作者：
Fan-Ming Yang;Xue-Yi Long;Sheng Long;Guo-Wen He
期刊：
Journal of Industrial and Engineering Chemistry,2025年 ISSN：1226-086X
通讯作者：
Fan-Ming Yang<&wdkj&>Guo-Wen He
作者机构：
[Xue-Yi Long; Sheng Long] College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000 Hunan, China;Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000 Hunan, China;[Fan-Ming Yang; Guo-Wen He] College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000 Hunan, China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000 Hunan, China
通讯机构：
[Fan-Ming Yang; Guo-Wen He] C;College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000 Hunan, China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000 Hunan, China
摘要：
N-decorated porous SCP-N-n was prepared for excellent rate charge/discharge performance. The electrochemical performance was evaluated in H 2 SO 4 electrolyte and the mechanism was researched on the basis of the physical nature, the dynamic analysis data and the calculated results of density functional theory (DFT). The results show that SCP-N-n samples are amorphous porous carbon materials with plentiful N detects. Moreover, all SCP-N-n materials are dominated by mesopores and macropores. N defects exist in the form of pyridinic N, pyrrodic N, graphitized N and oxidized N. Among these defects, graphitized N and oxidized N could strengthen the conductivity and enhance the infiltration. Moreover, pyridinic N and pyrrodic N could react with H + , resulting in the generation of pseudocapacitance. In H 2 SO 4 electrolyte, both electric double-layer capacitance (EDLC) and pseudocapacitance are important components of total capacitance. When the sweep rate is 200 mV/s, the contribution ratios of EDLC and pseudocapacitance are 56.5 % and 43.5 % for SCP-N-800. When the current density is 0.5 A/g, the specific discharge capacity and energy density are 186.9F/g and 16.6 Wh/kg, respectively. At 40 A/g, the capacitance is 62.9 % of that at 0.5 A/g. After 10,000 cycles, the capacity retention of SCP-N-800 reaches 94.1 %. The excellent electrochemical feature has a significant connection with the amorphous feature, the existence of N defects, large surface area, high void space and an appropriate aperture distribution.
N-decorated porous SCP-N-n was prepared for excellent rate charge/discharge performance. The electrochemical performance was evaluated in H 2 SO 4 electrolyte and the mechanism was researched on the basis of the physical nature, the dynamic analysis data and the calculated results of density functional theory (DFT). The results show that SCP-N-n samples are amorphous porous carbon materials with plentiful N detects. Moreover, all SCP-N-n materials are dominated by mesopores and macropores. N defects exist in the form of pyridinic N, pyrrodic N, graphitized N and oxidized N. Among these defects, graphitized N and oxidized N could strengthen the conductivity and enhance the infiltration. Moreover, pyridinic N and pyrrodic N could react with H + , resulting in the generation of pseudocapacitance. In H 2 SO 4 electrolyte, both electric double-layer capacitance (EDLC) and pseudocapacitance are important components of total capacitance. When the sweep rate is 200 mV/s, the contribution ratios of EDLC and pseudocapacitance are 56.5 % and 43.5 % for SCP-N-800. When the current density is 0.5 A/g, the specific discharge capacity and energy density are 186.9F/g and 16.6 Wh/kg, respectively. At 40 A/g, the capacitance is 62.9 % of that at 0.5 A/g. After 10,000 cycles, the capacity retention of SCP-N-800 reaches 94.1 %. The excellent electrochemical feature has a significant connection with the amorphous feature, the existence of N defects, large surface area, high void space and an appropriate aperture distribution.
摘要：
Carbon is predominantly used in zinc-ion hybrid capacitors (ZIHCs) as an electrode material. Nitrogen doping and strategic design can enhance its electrochemical properties. Melamine formaldehyde resin, serving as a hard carbon precursor, synthesizes nitrogen-doped porous carbon after annealing. Incorporating transition metal catalysts like Ni, Co, and Fe alters the morphology, pore structure, graphitization degree, and nitrogen doping types/proportions. Electrochemical tests reveal a superior capacitance of 159.5 F g−1 at a scan rate of 1 mV s−1 and rate performance in Fe-catalyzed N-doped porous carbon (Fe-NDPC). Advanced analysis shows Fe-NDPC’s high graphitic nitrogen content and graphitization degree, boosting its electric double-layer capacitance (EDLC) and pseudocapacitance. Its abundant micro- and mesopores increase the surface area fourfold compared to non-catalyzed samples, favoring EDLC and fast electrolyte transport. This study guides catalyst application in carbon materials for supercapacitors, illuminating how catalysts influence nitrogen-doped porous carbon structure and performance.
作者机构：
[Decai Ouyang; Mengxiong Chen; Yang Fu; Heng Zou; Huiwen Xiong; Lei Zhang; Kechao Zhou] State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, China;[Dan Xie] College of Materials and Chemical Engineering, Hunan City University, Yiyang, Hunan, 413000, China
通讯机构：
[Huiwen Xiong] S;State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, China
摘要：
This study investigates the interfacial behavior between high-entropy (TiNbTaWMo)C carbides and transition metal systems to develop advanced high-entropy cermets. The wettability characteristics of pure metals (Co, Fe, Ni) and a CoCrNiFeMn binder system were systematically examined through high-temperature sintering. Among these, Co and CoCrNiFeMn displayed superior wettability, forming interfacial reaction layers measuring 710 μm and 484 μm in thickness, respectively. Microstructural characterization revealed the precipitation of (W, Mo)C sub-carbides and carbon-deficient transition phases at carbide/binder interfaces, governed by a dissolution-precipitation mechanism. Based on these interfacial findings, two high-entropy cermets - (TiNbTaWMo)C-Co and (TiNbTaWMo)C-CoCrNiFeMn - were fabricated at 1450 °C. The resulting materials achieved near-theoretical densities (97%) with homogeneous microstructure. Remarkably, the (TiNbTaWMo)C-Co cermet demonstrated synergistic mechanical properties: flexural strength of 900.9 ± 9.8 MPa, fracture toughness of 9.8 ± 0.5 MPa·m 0.5 , and Vickers hardness of 1481.7 ± 20.4 N/mm 2 . These results establish a microstructure-property correlation framework for the design of high-entropy cermets.
This study investigates the interfacial behavior between high-entropy (TiNbTaWMo)C carbides and transition metal systems to develop advanced high-entropy cermets. The wettability characteristics of pure metals (Co, Fe, Ni) and a CoCrNiFeMn binder system were systematically examined through high-temperature sintering. Among these, Co and CoCrNiFeMn displayed superior wettability, forming interfacial reaction layers measuring 710 μm and 484 μm in thickness, respectively. Microstructural characterization revealed the precipitation of (W, Mo)C sub-carbides and carbon-deficient transition phases at carbide/binder interfaces, governed by a dissolution-precipitation mechanism. Based on these interfacial findings, two high-entropy cermets - (TiNbTaWMo)C-Co and (TiNbTaWMo)C-CoCrNiFeMn - were fabricated at 1450 °C. The resulting materials achieved near-theoretical densities (97%) with homogeneous microstructure. Remarkably, the (TiNbTaWMo)C-Co cermet demonstrated synergistic mechanical properties: flexural strength of 900.9 ± 9.8 MPa, fracture toughness of 9.8 ± 0.5 MPa·m 0.5 , and Vickers hardness of 1481.7 ± 20.4 N/mm 2 . These results establish a microstructure-property correlation framework for the design of high-entropy cermets.
摘要：
Developing efficient strategies for the removal of organic dyes from aqueous systems remains crucial for environmental remediation. Metal-organic frameworks (MOFs), particularly UiO-66, show exceptional promise as adsorbents; however, they suffer from limited dye uptake capacity. This study addresses this limitation through strategic hybridization of UiO-66 with renewable carbohydrates (glucose and fructose), achieving enhanced performance while reducing costs. The optimized glucose/UiO-66 and fructose/UiO-66 composites demonstrated superior adsorption capacities compared to pristine UiO-66 across multiple dyes: methylene blue (76/69 mg/g), malachite green (73/67 mg/g), rhodamine B (50/59 mg/g), methyl orange (81/169 mg/g), and Congo red (99/198 mg/g). Adsorption efficiency correlated with dye molecular dimensions and the composite's phenolic hydroxyl content. Kinetic analysis revealed pseudo-second-order adsorption behavior dominated by chemisorption via electrostatic and π–π interactions. Notably, fructose-modified composites exhibited exceptional performance for anionic dyes (methyl orange and Congo red), suggesting charge-selective adsorption mechanisms. This work establishes carbohydrate-MOF hybridization as an effective strategy for designing multifunctional adsorbents, providing fundamental insights into structure-performance relationships for environmental applications.
Developing efficient strategies for the removal of organic dyes from aqueous systems remains crucial for environmental remediation. Metal-organic frameworks (MOFs), particularly UiO-66, show exceptional promise as adsorbents; however, they suffer from limited dye uptake capacity. This study addresses this limitation through strategic hybridization of UiO-66 with renewable carbohydrates (glucose and fructose), achieving enhanced performance while reducing costs. The optimized glucose/UiO-66 and fructose/UiO-66 composites demonstrated superior adsorption capacities compared to pristine UiO-66 across multiple dyes: methylene blue (76/69 mg/g), malachite green (73/67 mg/g), rhodamine B (50/59 mg/g), methyl orange (81/169 mg/g), and Congo red (99/198 mg/g). Adsorption efficiency correlated with dye molecular dimensions and the composite's phenolic hydroxyl content. Kinetic analysis revealed pseudo-second-order adsorption behavior dominated by chemisorption via electrostatic and π–π interactions. Notably, fructose-modified composites exhibited exceptional performance for anionic dyes (methyl orange and Congo red), suggesting charge-selective adsorption mechanisms. This work establishes carbohydrate-MOF hybridization as an effective strategy for designing multifunctional adsorbents, providing fundamental insights into structure-performance relationships for environmental applications.
摘要：
In this work, Cu-based metal-organic framework material (Cu-MOF) was combined with an electric field to construct a three-dimensional electrocatalytic synergistic activation of peroxymonosulfate sulfate (PMS) system (3D/Cu-MOF/EC/PMS) for the degradation of norfloxacin (NOR). The results show that the synergistic degradation efficiency of the Cu-MOF material with the electric field is enhanced by nearly 64 % relative to the degradation efficiency of the two alone. The quenching experimental and EPR characterization indicates that ROS plays an important role in the degradation process, with center dot O2- playing a dominant role. Finally, the degradation pathway of NOR was explored by DFT study and LC-MS tests, and the toxicity evaluation software (TEST) and CCK-8 cytotoxicity experimental studies demonstrated that the sewage after the degradation of NOR by this system would have little or no effect on human liver cells (L02). This study not only shows that the 3D/Cu-MOF/ EC/PMS system can treat the water containing higher concentrations of NOR into a state that is not harmful to the human body but also provides a new idea for the improvement of catalysts that do not have obvious catalytic degradation effects.
期刊：
Chemical Engineering Journal,2025年:166845 ISSN：1385-8947
通讯作者：
Guowen He
作者机构：
[Yun Li; Yanjing Yang; Zan Gong; Liuyue Xiao; Siyi Chen; Ping Chen; Yalan Tang] College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China;[Guowen He] College of Materials and Chemical Engineering, Hunan City University, Key laboratory of low carbon and environmental functional materials of college of Hunan province, Yiyang 413000, PR China;Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, the “Double-First Class” Application Characteristic Discipline of Hunan Province (Pharmaceutical Science), Changsha Medical University, Changsha 410219, PR China;[Shian Zhong] College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China<&wdkj&>Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, the “Double-First Class” Application Characteristic Discipline of Hunan Province (Pharmaceutical Science), Changsha Medical University, Changsha 410219, PR China
通讯机构：
[Guowen He] C;College of Materials and Chemical Engineering, Hunan City University, Key laboratory of low carbon and environmental functional materials of college of Hunan province, Yiyang 413000, PR China
摘要：
Sulfanilamide (SN), characterized by its structural stability and resistance in natural degradation, has emerged as a persistent organic pollutant of great concern in aquatic environments. To address the challenge of efficiently removing high concentrations of SN, this study developed a three-dimensional catalytic degradation system (Mo SACs -CoCO 3 /3D-EC/PMS). In this system, single-atom molybdenum (Mo) not only serves as a highly active catalytic center but also enhances the synergistic effect of the support through electronic modulation. Under the influence of an external electric field, the system effectively activated peroxymonosulfate (PMS) to generate singlet oxygen ( 1 O 2 ), thereby enabling a dual-pathway degradation process characterized by non-radical-dominated and radical-assisted. The optimal conditions of degradation were determined by optimizing the parameters such as catalyst dosage, initial pH, current density. The degradation rate of 40 mg/L SN reached 96.88 % in 60 min. Comprehensive toxicity evaluations, including Cell Counting Kit-8 (CCK-8) assays, zebrafish embryo development, wheat germination, and Escherichia coli ( E. coli ) viability tests, confirmed the excellent environmental safety of both the catalyst and its degradation products.
Sulfanilamide (SN), characterized by its structural stability and resistance in natural degradation, has emerged as a persistent organic pollutant of great concern in aquatic environments. To address the challenge of efficiently removing high concentrations of SN, this study developed a three-dimensional catalytic degradation system (Mo SACs -CoCO 3 /3D-EC/PMS). In this system, single-atom molybdenum (Mo) not only serves as a highly active catalytic center but also enhances the synergistic effect of the support through electronic modulation. Under the influence of an external electric field, the system effectively activated peroxymonosulfate (PMS) to generate singlet oxygen ( 1 O 2 ), thereby enabling a dual-pathway degradation process characterized by non-radical-dominated and radical-assisted. The optimal conditions of degradation were determined by optimizing the parameters such as catalyst dosage, initial pH, current density. The degradation rate of 40 mg/L SN reached 96.88 % in 60 min. Comprehensive toxicity evaluations, including Cell Counting Kit-8 (CCK-8) assays, zebrafish embryo development, wheat germination, and Escherichia coli ( E. coli ) viability tests, confirmed the excellent environmental safety of both the catalyst and its degradation products.
作者：
Lide Yang;Jiacheng Liang;Zheng Liu;Jianmin Yuan;Guowen He
期刊：
Journal of Applied Polymer Science,2025年:e57010 ISSN：0021-8995
通讯作者：
Jianmin Yuan<&wdkj&>Guowen He
作者机构：
College of Materials and Chemical Engineering, Hunan City University, Yiyang, People's Republic of China;Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang, People's Republic of China;[Jianmin Yuan] College of Materials Science and Engineering, Hunan University, Changsha, China;[Lide Yang; Jiacheng Liang; Zheng Liu; Guowen He] College of Materials and Chemical Engineering, Hunan City University, Yiyang, People's Republic of China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang, People's Republic of China
通讯机构：
[Jianmin Yuan; Guowen He] C;College of Materials and Chemical Engineering, Hunan City University, Yiyang, People's Republic of China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang, People's Republic of China<&wdkj&>College of Materials Science and Engineering, Hunan University, Changsha, China
关键词：
graphene and fullerenes;membranes;nanotubes;surfaces and interfaces
摘要：
The exploitation, transportation, and utilization of various oil products frequently generate substantial volumes of oily wastewater, making the development of efficient treatment methods imperative for addressing environmental pollution and water scarcity. In this study, sodium hypochlorite was first employed to oxidize and etch the surface of the nylon mesh separation membrane (NFM), resulting in a modified NFM (M-NFM) characterized by a unique honeycomb-like porous structure and an abundance of oxygen-containing functional groups. Subsequently, a hydrophilic and positively charged UiO-66-NH 2 particle layer is in situ synthesized on the NFM surface, capitalizing on the abundant nucleation sites offered by carboxyl groups within the honeycomb framework, yielding the composite membrane of M-NFM/UiO-66-NH 2 (M-NFMU). To further enhance the oil–water separation performance of this composite membrane, surface-functionalized cellulose nanocrystals (SF-CNC) and graphene oxide (GO) were sequentially adsorbed onto the surface of the M-NFMU membrane through a synergetic self-assembly strategy. This process led to the formation of a hierarchical micro-nano structure on the surface of the NFM, ultimately producing a composite membrane designated as M-NFM@UiO-66-NH 2 /SF-CNC/GO (M-NFMUCG). During the oil–water separation process, water molecules engage in hydrogen-bonding interactions with the amine, carboxyl, and hydroxyl functional groups present in the UiO-66-NH 2 , SF-CNC, and GO structures. This interaction effectively captures and stabilizes a water film on the surface of the M-NFMUCG membrane, preventing oil from coming into contact with it. As a result, the M-NFMUCG exhibits remarkable superhydrophilicity, exceptional oil resistance, and outstanding oil–water separation performance, achieving a permeate flux of up to 16,361 L m 2 h −1 and an oil rejection rate exceeding 99.9% under gravity. Moreover, the M-NFMUCG membranes exhibit excellent chemical stability and remarkable salt resistance, underscoring their significant potential for the treatment of oily wastewater.
期刊：
International Journal of Reasoning-based Intelligent Systems,2025年16(6):417-426 ISSN：1755-0556
作者机构：
[Wenzhen Ku] College of Materials and Chemical Engineering, Hunan City University, Yiyang, 413000, Hunan, China;[Xiyang Li] College of Fine Arts and Design, Hunan City University, Yiyang, 413000, Hunan, China
关键词：
fine arts and traditional Chinese painting works;image colour;pixel level;wavelet transform algorithm;high frequency component;Markov chain.
摘要：
Aiming at the problems of low colour correction accuracy and large colour space decomposition error in colour correction of fine arts and traditional Chinese painting works, a colour correction method based on colour space decomposition is designed. First, the linear weighting algorithm is used to fuse the colour pixel level of the fine arts and traditional Chinese painting image. The wavelet transform algorithm is introduced to complete the extraction of colour features, and then the colour features are pre-processed. Finally, the state of colour space is determined, through the decomposition of row and column pixels in colour space, the deviation probability with Markov chain is calculated, and colour correction research through the determination of state function is realised. The results show that the proposed method can improve the accuracy of colour correction of fine arts and traditional Chinese painting images, and the colour space decomposition error is low.
摘要：
Porous carbons with plentiful nitrogen and phosphorus heteroatoms (CMs-N/P-n) derived from rice hull powder and melamine polyphosphate are synthesized for superior charge/discharge performance. In the amorphous CMs-N/P-n materials, a part of carbon atoms are graphitized, and the I D /I G ratios are 1.09, 1.00, and 0.99. In CMs-N/P-n, N heteroatoms are dominated by pyridinic and pyrrodic N forms and P species dispersed in the skeleton as P C, P O, and PO species. In 6 M KOH, the optimized CMs-N/P-850 demonstrates a conspicuous specific discharge capacity that is composed of a remarkable pseudocapacitance and a double-layer capacitance (EDLC). At 0.5 A g −1 , the discharge value is 593.1 F g −1 . Under 20 A g −1 , the capacitance still remains 46.2%. The superior capacitive characteristics are closely linked with the high cavity space, unique aperture distribution, and co-action of N and P species, which are favorable conditions for the accommodation and fast migration of OH − , and the generation of pseudocapacitance.
摘要：
In the contribution, a novel chemometric coupling technique combined with high-performance liquid chromatography with diode array detector (HPLC-DAD) was developed for the rapid quantification and source apportionment of eight monoaromatic hydrocarbons (MACHs) in soil samples. The strategy was built on the three-dimensional calibration based on alternating trilinear decomposition coupling with the unsupervised classification using t-distributed stochastic neighbor embedding (named ATLD-t-SNE). Firstly, a validation set and a spiked soil set were used to investigate the quantitative performance of the developed method. The obtained average recoveries of eight MACHs in soil samples were between (95.0 ± 4.4)% and (111.9 ± 3.3)%, and the limits of detection ranged from 0.0041μg mL −1 to 1.85 μg mL −1 , which were better than the results of parallel factor analysis-alternating least squares (PARAFAC-ALS). Subsequently, the proposed approach was applied to analyze actual soil samples collected from tea plantations (7 samples) and industrial areas (60 samples), revealing the presence of ethylbenzene (EBZ) and (1,3,5)-trimethylbenzene (MTY) in both types of soil samples, could the absence of other six MACHs. Finally, ATLD-t-SNE was utilized to classify these soil samples and a comparison between the new strategy and ATLD combined with feature component analysis as well as principal component analysis (called ATLD-FCA and ATLD-PCA, respectively) was made. The finding indicated that ATLD-t-SNE provided better clustering than other two methods, indicating different sources of organic pollution of MACHs in soil samples.
In the contribution, a novel chemometric coupling technique combined with high-performance liquid chromatography with diode array detector (HPLC-DAD) was developed for the rapid quantification and source apportionment of eight monoaromatic hydrocarbons (MACHs) in soil samples. The strategy was built on the three-dimensional calibration based on alternating trilinear decomposition coupling with the unsupervised classification using t-distributed stochastic neighbor embedding (named ATLD-t-SNE). Firstly, a validation set and a spiked soil set were used to investigate the quantitative performance of the developed method. The obtained average recoveries of eight MACHs in soil samples were between (95.0 ± 4.4)% and (111.9 ± 3.3)%, and the limits of detection ranged from 0.0041μg mL −1 to 1.85 μg mL −1 , which were better than the results of parallel factor analysis-alternating least squares (PARAFAC-ALS). Subsequently, the proposed approach was applied to analyze actual soil samples collected from tea plantations (7 samples) and industrial areas (60 samples), revealing the presence of ethylbenzene (EBZ) and (1,3,5)-trimethylbenzene (MTY) in both types of soil samples, could the absence of other six MACHs. Finally, ATLD-t-SNE was utilized to classify these soil samples and a comparison between the new strategy and ATLD combined with feature component analysis as well as principal component analysis (called ATLD-FCA and ATLD-PCA, respectively) was made. The finding indicated that ATLD-t-SNE provided better clustering than other two methods, indicating different sources of organic pollution of MACHs in soil samples.
作者机构：
College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, Hunan, China;Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000, Hunan, China;[Yongshuang Hu; Guqing Xiao; Yi Sun; Qiudong Meng] College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, Hunan, China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000, Hunan, China
通讯机构：
[Guqing Xiao] C;College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, Hunan, China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000, Hunan, China
摘要：
Glyphosate, the most widespread organophosphorus herbicide, enters lakes, rivers and groundwater through rainwater and surface runoff. It is very important to remove glyphosate from neutral water bodies. A new strategy for the development of glyphosate adsorbent was implemented through in situ nanoconfinement of hydrated ferric oxide (Fe 2 O 3 ·nH 2 O) in an anion exchange resin D201 (D201/Fe 2 O 3 ·nH 2 O). Fe 2 O 3 ·nH 2 O was confined within the 12–140 nm pores of D201/Fe 2 O 3 ·nH 2 O, exhibiting uniform distribution, nanoscale and amorphous state. Benefiting from the cross-linked polystyrene network, D201/Fe 2 O 3 ·nH 2 O featured excellent chemical stability in weakly acidic (pH > 3), alkaline and salt solutions. Compared with its host D201, D201/Fe 2 O 3 ·nH 2 O exhibited larger rate constant k 1 , larger glyphosate capacity and superior selectivity at pH = 7.0 ± 0.05. Corresponding its bifunctional groups of -N + (CH 3 ) 3 and Fe 2 O 3 ·nH 2 O, D201/Fe 2 O 3 ·nH 2 O could adsorb glyphosate through the two mechanisms of the ligand exchange between glyphosate anion and hydroxyl group, as well as the anion exchange between Cl − and glyphosate anion. D201/Fe 2 O 3 ·nH 2 O showed the commendable reusability and maintained constant glyphosate adsorption capacities at 161.5–164.5 mg/g in five consecutive adsorption-regeneration cycles. At the injection glyphosate concentration of 1.1 mg/mL, the effective processing volumes of D201/Fe 2 O 3 ·nH 2 O were 3.81 and 3.21 times that of D201 at two breakthrough points.
Glyphosate, the most widespread organophosphorus herbicide, enters lakes, rivers and groundwater through rainwater and surface runoff. It is very important to remove glyphosate from neutral water bodies. A new strategy for the development of glyphosate adsorbent was implemented through in situ nanoconfinement of hydrated ferric oxide (Fe 2 O 3 ·nH 2 O) in an anion exchange resin D201 (D201/Fe 2 O 3 ·nH 2 O). Fe 2 O 3 ·nH 2 O was confined within the 12–140 nm pores of D201/Fe 2 O 3 ·nH 2 O, exhibiting uniform distribution, nanoscale and amorphous state. Benefiting from the cross-linked polystyrene network, D201/Fe 2 O 3 ·nH 2 O featured excellent chemical stability in weakly acidic (pH > 3), alkaline and salt solutions. Compared with its host D201, D201/Fe 2 O 3 ·nH 2 O exhibited larger rate constant k 1 , larger glyphosate capacity and superior selectivity at pH = 7.0 ± 0.05. Corresponding its bifunctional groups of -N + (CH 3 ) 3 and Fe 2 O 3 ·nH 2 O, D201/Fe 2 O 3 ·nH 2 O could adsorb glyphosate through the two mechanisms of the ligand exchange between glyphosate anion and hydroxyl group, as well as the anion exchange between Cl − and glyphosate anion. D201/Fe 2 O 3 ·nH 2 O showed the commendable reusability and maintained constant glyphosate adsorption capacities at 161.5–164.5 mg/g in five consecutive adsorption-regeneration cycles. At the injection glyphosate concentration of 1.1 mg/mL, the effective processing volumes of D201/Fe 2 O 3 ·nH 2 O were 3.81 and 3.21 times that of D201 at two breakthrough points.
摘要：
For achieving cost-effectiveness, the utilization of printable carbon-based conductive inks has emerged as a critical driver for the industrial advancement of flexible micro-supercapacitors (MSCs). However, the commercial application of carbon-based conductive ink is still limited by their low electrical conductivity and capacitance, attributed to the limited conductive pathways and pore structures resulting from the stacking of conductive materials. Herein, a carbon-based composite aqueous ink based on graphene, multi-walled carbon nanotubes, and conductive carbon black (GMC) is developed for scalable screen printing of MSCs. The integration of these carbon components forms a three-dimensional porous conductive network with exceptional flexibility. This network not only enhances electron transfer pathways but also increases the accessible surface area for electrolyte ions. Thanks to these advantages, the GMC-MSCs deliver high conductivity (10,843.62 S m −1 ), excellent energy storage performance (an areal capacitance of 12.94 mF cm −2 at a current density of 0.02 mA cm −2 ), and stable cycling life (102.4 % capacitance retention after 10,000 cycles). Furthermore, these devices exhibit outstanding flexibility with 150 % capacity retention after 9000 bending cycles, thus paving the way for the widespread application of flexible MSCs.
For achieving cost-effectiveness, the utilization of printable carbon-based conductive inks has emerged as a critical driver for the industrial advancement of flexible micro-supercapacitors (MSCs). However, the commercial application of carbon-based conductive ink is still limited by their low electrical conductivity and capacitance, attributed to the limited conductive pathways and pore structures resulting from the stacking of conductive materials. Herein, a carbon-based composite aqueous ink based on graphene, multi-walled carbon nanotubes, and conductive carbon black (GMC) is developed for scalable screen printing of MSCs. The integration of these carbon components forms a three-dimensional porous conductive network with exceptional flexibility. This network not only enhances electron transfer pathways but also increases the accessible surface area for electrolyte ions. Thanks to these advantages, the GMC-MSCs deliver high conductivity (10,843.62 S m −1 ), excellent energy storage performance (an areal capacitance of 12.94 mF cm −2 at a current density of 0.02 mA cm −2 ), and stable cycling life (102.4 % capacitance retention after 10,000 cycles). Furthermore, these devices exhibit outstanding flexibility with 150 % capacity retention after 9000 bending cycles, thus paving the way for the widespread application of flexible MSCs.
作者机构：
[Xiangdong Qing; Xinran Wu; Taoxiang Wang; Zhiyuan Hu; Xiaohong Zhou; Rong An] Hunan Provincial Key Laboratory of Dark Tea and Jin-hua, College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, PR China;[Xiaohua Zhang] Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, PR China;[Jie Luan] Hygienic Physicochemical Center, Yunnan Center for Disease Control and Prevention, Kunming 650022, PR China
通讯机构：
[Xiangdong Qing] H;Hunan Provincial Key Laboratory of Dark Tea and Jin-hua, College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, PR China
摘要：
In the work, a novel strategy was developed to characterize and classify Chinese dark tea based on alternating trilinear decomposition combined with uniform manifold approximation and projection (ATLD-UMAP). Firstly, nine active components as targeted analytes were selected to construct qualitative and quantitative models to investigate the performance of ATLD-UMAP analysis of 3D fluorescence data. Spiked sample sets demonstrated that satisfactory results were returned with their average recoveries ranging from (91.4 ± 9.7)% to (109.3 ± 1.5)%. Subsequently, ATLD-UMAP was employed to analyze the contents of analytes in 124 real dark tea samples, revealing the presence of eight active components other than tryptophan with their average contents ranging from 0.22 mg·g −1 to 57.69 mg·g −1 . Finally, ATLD-UMAP was applied to discriminate tea samples produced from different geographical origins and processing depths, and compared with the targeted-based feature component analysis (ATLD-FCA) and the nontargeted-based principal component analysis (ATLD-PCA). The research findings demonstrated that ATLD-UMAP achieved satisfactory classification results (100.0 % accuracy, sensitivity and specificity) in simultaneously identifying dark tea's geographical origin and processing depth. In contrast, ATLD-FCA and ATLD-PCA failed to distinguish them accurately with accuracies of only 68.5 % and 64.8 %, respectively. In a word, ATLD-UMAP provides a new method for rapid authenticity identification in the dark tea industry.
In the work, a novel strategy was developed to characterize and classify Chinese dark tea based on alternating trilinear decomposition combined with uniform manifold approximation and projection (ATLD-UMAP). Firstly, nine active components as targeted analytes were selected to construct qualitative and quantitative models to investigate the performance of ATLD-UMAP analysis of 3D fluorescence data. Spiked sample sets demonstrated that satisfactory results were returned with their average recoveries ranging from (91.4 ± 9.7)% to (109.3 ± 1.5)%. Subsequently, ATLD-UMAP was employed to analyze the contents of analytes in 124 real dark tea samples, revealing the presence of eight active components other than tryptophan with their average contents ranging from 0.22 mg·g −1 to 57.69 mg·g −1 . Finally, ATLD-UMAP was applied to discriminate tea samples produced from different geographical origins and processing depths, and compared with the targeted-based feature component analysis (ATLD-FCA) and the nontargeted-based principal component analysis (ATLD-PCA). The research findings demonstrated that ATLD-UMAP achieved satisfactory classification results (100.0 % accuracy, sensitivity and specificity) in simultaneously identifying dark tea's geographical origin and processing depth. In contrast, ATLD-FCA and ATLD-PCA failed to distinguish them accurately with accuracies of only 68.5 % and 64.8 %, respectively. In a word, ATLD-UMAP provides a new method for rapid authenticity identification in the dark tea industry.
通讯机构：
[Xiao, GQ ] H;Hunan City Univ, Coll Mat & Chem Engn, Yiyang 413000, Hunan, Peoples R China.
关键词：
Nanoconfinement;Adsorption;Bisphenol A
摘要：
Bisphenol A (BPA), as an estrogen and endocrine disruptor, has been extensively found in groundwater, surface water and even drinking water. Herein, the magnetic D201-Fe 3 O 4 nanocomposite was successfully fabricated through in situ confinement of Fe 3 O 4 nanocrystalline in millimeter-sized D201 anion exchange resin. EDS elemental mapping of Fe, TEM image, XRD pattern and VSM magnetization curve of D201-Fe 3 O 4 nanocomposite revealed that the confined Fe 3 O 4 particles exhibited uniform distribution, nanosize, highly crystalline nature and strong superparamagnetism. Benefiting from the synergism of the polymer skeleton and Fe 3 O 4 nanocrystalline, D201-Fe 3 O 4 nanocomposite featured satisfactory thermal stability and chemical stability. D201-Fe 3 O 4 nanocomposite showed the maximum BPA adsorption capacity of 246.9 mg/g, which exceeded most of the reported adsorbents in the literature. Within the wide pH range of 3.8–9.8, the adsorption capacities of BPA on D201-Fe 3 O 4 nanocomposite were basically unchanged. Compared with D201, the additional O Fe coordination bond made D201-Fe 3 O 4 nanocomposite exhibit 2.9 times of the first order rate constant k 1 and 1.4 times of the treatable volume when 0.7 mg/mL BPA solution was adsorbed. D201-Fe 3 O 4 nanocomposite could be easily refreshed using binary 80 % C 2 H 5 OH-1.5 % NaCl solution and featured excellent reusability after five adsorption-desorption cycles. D201-Fe 3 O 4 nanocomposite is promising for the removal of BPA in scaled-up application.
Bisphenol A (BPA), as an estrogen and endocrine disruptor, has been extensively found in groundwater, surface water and even drinking water. Herein, the magnetic D201-Fe 3 O 4 nanocomposite was successfully fabricated through in situ confinement of Fe 3 O 4 nanocrystalline in millimeter-sized D201 anion exchange resin. EDS elemental mapping of Fe, TEM image, XRD pattern and VSM magnetization curve of D201-Fe 3 O 4 nanocomposite revealed that the confined Fe 3 O 4 particles exhibited uniform distribution, nanosize, highly crystalline nature and strong superparamagnetism. Benefiting from the synergism of the polymer skeleton and Fe 3 O 4 nanocrystalline, D201-Fe 3 O 4 nanocomposite featured satisfactory thermal stability and chemical stability. D201-Fe 3 O 4 nanocomposite showed the maximum BPA adsorption capacity of 246.9 mg/g, which exceeded most of the reported adsorbents in the literature. Within the wide pH range of 3.8–9.8, the adsorption capacities of BPA on D201-Fe 3 O 4 nanocomposite were basically unchanged. Compared with D201, the additional O Fe coordination bond made D201-Fe 3 O 4 nanocomposite exhibit 2.9 times of the first order rate constant k 1 and 1.4 times of the treatable volume when 0.7 mg/mL BPA solution was adsorbed. D201-Fe 3 O 4 nanocomposite could be easily refreshed using binary 80 % C 2 H 5 OH-1.5 % NaCl solution and featured excellent reusability after five adsorption-desorption cycles. D201-Fe 3 O 4 nanocomposite is promising for the removal of BPA in scaled-up application.
作者机构：
College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, PR China;Key Laboratory of Low Carbon And Environmental Functional Materials of College of Hunan Province, Yiyang 413000, PR China;[Jianmin Yuan] College of Materials Science and Engineering, Hunan University, Changsha, PR China;[Lide Yang; Dandan Li; Jia Chen; Qian Yang; Huiying Wang; Zheng Liu; Guowen He] College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, PR China<&wdkj&>Key Laboratory of Low Carbon And Environmental Functional Materials of College of Hunan Province, Yiyang 413000, PR China
通讯机构：
[Jianmin Yuan] C;College of Materials Science and Engineering, Hunan University, Changsha, PR China
摘要：
With the increasing power density of electronic devices, flexible thermal interface materials face the challenge of reconciling thermal conductivity efficiency with mechanical compatibility, which restricts the reliability of high-density integrated systems. This study achieves oxygen-amine co-functionalization of nanodiamonds/boron nitride nanosheets via a two-step chemical process, and constructs a 3D thermal network in cellulose nanofibers by combining vacuum self-assembly with hot-pressing technology. The prepared film exhibits bidirectional thermal conductivities of 18.65/4.72 W·m −1 ·K −1 , a volume resistivity exceeding 10 12 Ω·cm, and retains 97 % of its thermal conductivity after 1000 folding cycles. In comparison to commercial silicon-based TIMs, our composite significantly enhances the cooling effect, achieving a substantial temperature reduction of 33 °C on the LED chip surface. The results indicate that functionalized nanofillers reduce phonon scattering through interfacial anchoring effects, and their synergistic interaction is the key to the performance breakthrough. This work realizes efficient thermal transport in a flexible insulating system for the first time, providing a new solution for thermal management in high-power flexible electronics and surpassing the limitations of existing materials in terms of stability and multifunctional integration.
With the increasing power density of electronic devices, flexible thermal interface materials face the challenge of reconciling thermal conductivity efficiency with mechanical compatibility, which restricts the reliability of high-density integrated systems. This study achieves oxygen-amine co-functionalization of nanodiamonds/boron nitride nanosheets via a two-step chemical process, and constructs a 3D thermal network in cellulose nanofibers by combining vacuum self-assembly with hot-pressing technology. The prepared film exhibits bidirectional thermal conductivities of 18.65/4.72 W·m −1 ·K −1 , a volume resistivity exceeding 10 12 Ω·cm, and retains 97 % of its thermal conductivity after 1000 folding cycles. In comparison to commercial silicon-based TIMs, our composite significantly enhances the cooling effect, achieving a substantial temperature reduction of 33 °C on the LED chip surface. The results indicate that functionalized nanofillers reduce phonon scattering through interfacial anchoring effects, and their synergistic interaction is the key to the performance breakthrough. This work realizes efficient thermal transport in a flexible insulating system for the first time, providing a new solution for thermal management in high-power flexible electronics and surpassing the limitations of existing materials in terms of stability and multifunctional integration.
摘要：
Extracting valuable physical and chemical information from massive hyperspectral imaging (HSI) data is a pressing challenge for food analysis. In this study, a new and intelligent strategy was developed to identify trace adulterants in the food matrix. The strategy was based on the hierarchical agglomerative clustering analysis of essential information selected by interesting features finder as well as uniform manifold approximation and projection from HSI data (named IFF-UMAP-HAC). Four Raman HSI datasets and four NIR HSI datasets were utilized to verify the accuracy and reliability of the new strategy, and a systematic comparison was conducted among the proposed method, UMAP-HAC, t-distributed stochastic neighborhood embedding with HAC (t-SNE-HAC) as well as IFF-t-SNE-HAC. When the adulterant with a high level was presented in food matrix (i.e. >= 0.1% mass melamine in milk powder), all methods enabled highly accurate identification and well separation of adulterants within HSI datasets. However, only IFF-UMAP-HAC provided satisfactory results for analysis of trace adulterants in food matrix such as samples adulterated with 0.014% melamine in milk powder, <= 0.05% melamine in wheat gluten and trace ternary adulterants in milk powder. Moreover, the new strategy did not require prior knowledge of HSI data structures and class information. In summary, the integration of HSI with IFF-UMAP-HAC proved feasible, offering sample preparation-free, nondestructive and green analysis while paving the way for the rapid detection of trace adulterants in food matrix.
期刊：
International Journal of Reasoning-based Intelligent Systems,2024年16(4):267-277 ISSN：1755-0556
作者机构：
[Wenzhen Ku] College of Materials and Chemical Engineering, Hunan City University, Yiyang, 413000, Hunan, China;[Xiyang Li] College of Fine Arts and Design, Hunan City University, Yiyang, 413000, Hunan, China
关键词：
deep learning;Chinese painting works;image reconstruction;Gaussian filtering;colour component;residual network.
摘要：
Aiming at the problems of large sparse decomposition error of pixel signal, low reconstruction accuracy and slow reconstruction speed in traditional Chinese painting image reconstruction, a method of traditional Chinese painting image reconstruction based on depth learning is proposed. The image signal of traditional Chinese painting works is decomposed sparsely by the dictionary. The traditional Chinese painting image is weighted according to the Gaussian filter, the impurities in the signal are removed by the bilateral filter method, and the edge of the traditional Chinese painting image is corrected by the colour component method. This is to build the depth learning model of the traditional Chinese painting image reconstruction and achieve accurate and efficient reconstruction. The results show that this method can reduce the sparse decomposition error of pixel signal, less than 0.15%, the reconstruction accuracy reaches 97%, and the reconstruction time is shortened, the maximum time is only 1.5 s, indicating that this method is feasible.
摘要：
通过对不同的课程设置、不同的师资培养手段、以及多层级平台支撑条件的研究,构建了一个“思政引领、分层培养、全过程、多维度”的培养育人模式。同时在课程设置上强化工程和实践类教学课程模块的设置,加大产教融合和校企合作,构建以实...展开更多 通过对不同的课程设置、不同的师资培养手段、以及多层级平台支撑条件的研究,构建了一个“思政引领、分层培养、全过程、多维度”的培养育人模式。同时在课程设置上强化工程和实践类教学课程模块的设置,加大产教融合和校企合作,构建以实践技能为核心的课程体系,突出实践技能培养,全方位、多角度进行人才培养。进而实现思政引领“六位一体”的思创融合新路径,达到思创的深度融合。最后通过组织保障和评价体系的研究结果修订完善课程体系、培养模式和保障机制,有效提升大学生的双创能力。Through the study of different curriculum settings, different means of teacher training, and multi-level platform supporting conditions, an “ideological and political guidance, the whole process, multi-dimensional, hierarchical training” training mode is constructed. At the same time, this paper strengthens the setting of the course module of engineering and practice teaching, strengthens the integration of production and teaching and the cooperation between schools and enterprises, constructs the course system with practice skills as the core, and emphasizes the training of practice skills, all-round, multi-angle personnel training. And then to achieve the ideological and political leadership of the “six in one” new ways of creative integration, creative integration to achieve a deep integration. Finally, through the research results of organizational security and evaluation system, revise and improve the curriculum system, training mode and guarantee mechanism to enhance students’ ability of double Innovation.收起
摘要：
Axillary bud outgrowth, a key factor in ratoon rice yield formation, is regulated by several phytohormone signals. The regulatory mechanism of key genes underlying ratoon buds in response to phytohormones in ratoon rice has been less reported. In this study, GR24 (a strigolactone analogue) was used to analyze the ratooning characteristics in rice cultivar Huanghuazhan (HHZ). Results show that the elongation of the axillary buds in the first seasonal rice was significantly inhibited and the ratoon rate was reduced at most by up to 40% with GR24 treatment. Compared with the control, a significant reduction in the content of auxin and cytokinin in the second bud from the upper spike could be detected after GR24 treatment, especially 3 days after treatment. Transcriptome analysis suggested that there were at least 742 and 2877 differentially expressed genes (DEGs) within 6 h of GR24 treatment and 12 h of GR24 treatment, respectively. Further bioinformatics analysis revealed that GR24 treatment had a significant effect on the homeostasis and signal transduction of cytokinin and auxin. It is noteworthy that the gene expression levels of OsCKX1, OsCKX2, OsGH3.6, and OsGH3.8, which are involved in cytokinin or auxin metabolism, were enhanced by the 12 h GR24 treatment. Taken overall, this study showed the gene regulatory network of auxin and cytokinin homeostasis to be regulated by strigolactone in the axillary bud outgrowth of ratoon rice, which highlights the importance of these biological pathways in the regulation of axillary bud outgrowth in ratoon rice and would provide theoretical support for the molecular breeding of ratoon rice.
作者机构：
[Ma, Dechong; Pan, Sai; Chen, Yuli; Ma, DC; He, Guowen] Hunan City Univ, Coll Mat & Chem Engn, Yiyang 413000, Peoples R China.;[Ma, Dechong; Ma, DC; He, Guowen] Hunan City Univ, Coll Hunan Prov, Key Lab Low Carbon & Environm Funct Mat, Yiyang 413000, Peoples R China.
通讯机构：
[Ma, DC ] H;Hunan City Univ, Coll Mat & Chem Engn, Yiyang 413000, Peoples R China.;Hunan City Univ, Coll Hunan Prov, Key Lab Low Carbon & Environm Funct Mat, Yiyang 413000, Peoples R China.
关键词：
active species;fusiform Bi;different pH values;photocatalytic mechanism;degradation pathway
摘要：
In this study, fusiform bismuth (Bi) was synthesized, and its photocatalytic performance, degradation mechanism, and pathways for removing rhodamine B (RhB) at different pH levels were investigated. Additionally, the morphologies, structural characteristics, surface electronic states, optical properties, active species, and potential degradation pathways of RhB over the fusiform Bi were analyzed. The comparison of the results before and after RhB degradation using the fusiform Bi revealed the formation of a Bi/BiOCl heterojunction photocatalyst. At pH 2.0, 3.0, 5.0, 7.0, and 9.0, the heterojunction exhibited excellent photocatalytic activity, with RhB removal efficiencies of similar to 97%, 96.7%, 72.6%, 53.5%, and 27.6%, respectively. Moreover, total organic carbon and chemical oxygen demand analyses were performed to evaluate the mineralization rates of RhB with the fusiform Bi at pH 3.0 and 7.0. Furthermore, the effects of catalyst content, initial RhB concentration, light source distance, inorganic anions, and reactant temperature on the photocatalytic performance of the fusiform Bi were investigated. Additionally, the types of active species and potential photocatalytic mechanisms for RhB degradation over the fusiform Bi at different pH levels (3.0 and 7.0) were elucidated. The appropriate degradation pathways were identified via liquid chromatography-mass spectrometry at pH 3.0 and 7.0.
