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.
期刊：
Separation and Purification Technology,2025年356:129945 ISSN：1383-5866
通讯作者：
Guowen He
作者机构：
[Yun Li; Yirui Sun; Zihan Huang; Xiuhao Zhu; Shang Li; Ping Chen; Yalan Tang] College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China;[Jiaqi Bu] Hunan Haili Chemical Industry Co., Ltd., Changsha 410007, 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：
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.
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.
摘要：
Tea waste contains various substances with phenolic hydroxyl groups, including lignin, tannins, tea polyphenols, etc., which are rarely utilized. In this study, tea waste was directly dispersed with graphene oxide to prepare tea waste/reduced graphene oxide (TW/rGO) hydrogel through a one-step hydrothermal method. The prepared hydrogel presented a continuous three-dimensional porous structure and exhibited good mechanical properties with a compressive strength of 53.4 ± 4.0 kPa. It also showed excellent electrochemical performance as an electrode material. Its specific capacitance reached 434.7 F g(-1) at a current density of 1 A g(-1), and its capacitance retention was 55.8% when the current density was increased to 100 A g(-1). In addition, an TW/rGO assembled all-solid-state supercapacitor demonstrated a superior specific capacitance of 372.8 F g(-1) and a competitive energy density of 12.9 Wh kg(-1) at 1 A g(-1).
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.
关键词：
Deep eutectic solvents;Three-phase partitioning;Edible liquid oil;Speciation analysis of Chromium;Liquid -liquid microextraction
摘要：
In this paper, a novelty ternary deep eutectic solvents was prepared with choline chloride , ethylene glycol and glycerol. The pH value was adjust to develop three-phase for speciation of Cr (Ⅲ) and Cr (Ⅵ) extract and separate in ganoderma lucidum spore oil based on ternary deep eutectic solvents. The results show that DES-4 has a good extraction of Cr (III) and Cr (VI), the sample-extraction ratio was 3:1, Cr (III) was protected by EDTA, all chromium ions in ganoderma lucidum spore oil was extracted by near 100 % in 2 times, Cr (III) and Cr (VI) was well separated by saturated buffer solution of KH 2 PO 4 /H 3 PO 4 (pH = 4.5). The LOD is 0.031 mg/kg. The RSD is 4.1 %. The recovery between 85.2 % and 111.5 %. This method was successfully applied to detect speciation chromium in other edible liquid oil.
In this paper, a novelty ternary deep eutectic solvents was prepared with choline chloride , ethylene glycol and glycerol. The pH value was adjust to develop three-phase for speciation of Cr (Ⅲ) and Cr (Ⅵ) extract and separate in ganoderma lucidum spore oil based on ternary deep eutectic solvents. The results show that DES-4 has a good extraction of Cr (III) and Cr (VI), the sample-extraction ratio was 3:1, Cr (III) was protected by EDTA, all chromium ions in ganoderma lucidum spore oil was extracted by near 100 % in 2 times, Cr (III) and Cr (VI) was well separated by saturated buffer solution of KH 2 PO 4 /H 3 PO 4 (pH = 4.5). The LOD is 0.031 mg/kg. The RSD is 4.1 %. The recovery between 85.2 % and 111.5 %. This method was successfully applied to detect speciation chromium in other edible liquid oil.
摘要：
The efficient synthesis of sulfonated naphthols was realized by dehydroaromatization of (3-tetralones with sodium sulfinates under metal-free conditions. Iodine-containing reagents played an important role in this oxidative coupling process. Sodium sulfinates served as a stable and readily available sulfur source, providing sulfones in good to excellent yields. A wide range of functional groups were well tolerated in this reaction.
摘要：
Single-atom catalysts have wide application prospects in peroxydisulfate (PDS)-based advanced oxidation process to degrade organic pollutants, but its catalytic performance is limited due to its cost, Metal-N coordination number, and single-atom loading amount. Herein, a novel nitrogen doped algal-based carbon confined singleatom copper catalyst (Cu-N/C-SAC((S))) was synthesized using molten salt assisted pyrolysis and coupling with PDS to degrade tetracycline (TC). AC-HAADF-STEM and XAFS analysis proved that single atom Cu was loaded (Content 1.9 %) successfully and coordinated with two N and two C. XPS and XANES spectra analysis suggested that Cu atoms mainly existed in a positive divalent state in Cu-N/C-SAC(S). When the catalyst dosage of Cu-N/CSAC((S)) was 0.1 g/L, TC was almost completely removed. Moreover, Cu-N/C-SAC(S) had a broad pH adaptation range and strong ability against interference. Singlet oxygen (O-1(2)), superoxide radicals (center dot O-2(-)), and electron transfer had an important contribution for TC removal. DFT calculations confirmed that the activation process of Cu-N/C-SAC((S)) producing SO4 center dot- was easier than the nitrogen doped blue-green algal-based carbon (N-BGAC). In addition, Cu-N/C-SAC((S)) possessed good recyclability and stability. The main degradation pathways of TC were analyzed, and the toxicity of the intermediates was calculated. This study provides a new solution strategy for the resource utilization of waste biomass, and provides technical support and theoretical guidance for the efficient application of single-atom catalysts in organic wastewater.
作者机构：
[Chen, Xiaohua; Liu, Zhixiao; Hu, Aiping; Chang, Ge; Yang, Yujie; Qian, Yang; Tang, Qunli; Chen, Xingzhu; Huang, Cong] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China.;[Yang, Yujie] Zhengzhou Univ Light Ind, Coll New Energy, Zhengzhou 450002, Peoples R China.;[Liu, Zheng] Hunan City Univ, Coll Mat & Chem Engn, Coll Hunan Prov, Key Lab Low Carbon & Environm Funct Mat, R China, Yiyang 413000, Peoples R China.
通讯机构：
[Hu, AP; Chen, XH ] H;Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China.
摘要：
The application of sodium anodes is essential for developing high-energy density, low-cost, and high-security solid-state sodium–metal batteries (SSSMBs) to replace commercial lithium ion batteries. However, poor interface contact, high resistance, and dendrite growth between the sodium anode and solid-state electrolyte (SSE) have hampered the application of SSSMBs. Herein, an ultrastable composite sodium anode with gradient ion-electron conductive phases was constructed through the in situ conversion and alloying reaction between SbF 3 and sodium. The tightly contacted solid–solid interface between the composite anode and sodium superionic conductor oxide SSE is enriched with NaF and inside the anode is enriched with Na 3 Sb, which can inhibit the growth of sodium dendrites and accelerate the transport of bulk-phase sodium to the interface. Benefiting from these advantages, both symmetric and full cells assembled with such composite electrodes display excellent electrochemical performance. These results offer a novel composite anode design for the practical application of SSSMBs.
作者：
Sun, Yi;Xiao, Guqing;Liu, Zijun;Wu, Dan;Xia, Li
期刊：
Reactive and Functional Polymers,2024年204:106031 ISSN：1381-5148
通讯作者：
Xiao, GQ
作者机构：
[Xiao, Guqing; Liu, Zijun; Xia, Li; Sun, Yi; Wu, Dan] Hunan City Univ, Coll Mat & Chem Engn, Yiyang 413000, Hunan, Peoples R China.;[Liu, Zijun; Xiao, Guqing; Xia, Li; Sun, Yi; Wu, Dan] Key Lab low carbon & Environm funct Mat Coll Hunan, Yiyang 413000, Hunan, Peoples R China.
通讯机构：
[Xiao, GQ ] H;Hunan City Univ, Coll Mat & Chem Engn, Yiyang 413000, Hunan, Peoples R China.
关键词：
Fe3+in-situ loaded on D113;Glyphosate;Salt tolerance;Coordination adsorption
摘要：
There are inorganic salts in glyphosate production liquor and natural water bodies coexisting with glyphosate. It is imperative to develop a salt-tolerant adsorbent for glyphosate in water. Industrial D113 resin undergone two-step transformation to optimize the preparation of D113 in-situ loaded with Fe3+ (D113-Fe3+) as salt-resistance glyphosate adsorbent. The loading amount of Fe3+ on D113-Fe3+ is 3.5 mmol/g. The adsorption mechanism revealed that Fe3+ in D113-Fe3+ formed Fe-O-P bond with the phosphonate group of glyphosate. At 293 K, the maximum complex ratio of the adsorbed glyphosate to Fe3+ in D113-Fe3+ was 2.4:1. At 293 K, the remarkable saturated glyphosate adsorption capacity of D113-Fe3+ reached 1420.2 mg/g. In pK2 state of glyphosate, D113-Fe3+ featured its maximum adsorption capacity at the zero charge point 2.43 of D113-Fe3+ and 293 K. In glyphosate solution coexisting 0–16 % NaCl, D113-Fe3+ exhibited stable glyphosate adsorption capacity and salt-resistance compared with D201, D301 and 330 resin. The endothermic and spontaneous adsorption of glyphosate on D113-Fe3+ can fit Freundlich model and pseudo-second-order model. 2 mol/L NH3·H2O, 2 mol/L FeCl3 and 2 mol/L H2SO4 could all regenerate D113-Fe3+. The characteristics of salt-resistance and the remarkable saturated adsorption capacity made D113-Fe3+ comparable to all reported glyphosate adsorbents.
There are inorganic salts in glyphosate production liquor and natural water bodies coexisting with glyphosate. It is imperative to develop a salt-tolerant adsorbent for glyphosate in water. Industrial D113 resin undergone two-step transformation to optimize the preparation of D113 in-situ loaded with Fe3+ (D113-Fe3+) as salt-resistance glyphosate adsorbent. The loading amount of Fe3+ on D113-Fe3+ is 3.5 mmol/g. The adsorption mechanism revealed that Fe3+ in D113-Fe3+ formed Fe-O-P bond with the phosphonate group of glyphosate. At 293 K, the maximum complex ratio of the adsorbed glyphosate to Fe3+ in D113-Fe3+ was 2.4:1. At 293 K, the remarkable saturated glyphosate adsorption capacity of D113-Fe3+ reached 1420.2 mg/g. In pK2 state of glyphosate, D113-Fe3+ featured its maximum adsorption capacity at the zero charge point 2.43 of D113-Fe3+ and 293 K. In glyphosate solution coexisting 0–16 % NaCl, D113-Fe3+ exhibited stable glyphosate adsorption capacity and salt-resistance compared with D201, D301 and 330 resin. The endothermic and spontaneous adsorption of glyphosate on D113-Fe3+ can fit Freundlich model and pseudo-second-order model. 2 mol/L NH3·H2O, 2 mol/L FeCl3 and 2 mol/L H2SO4 could all regenerate D113-Fe3+. The characteristics of salt-resistance and the remarkable saturated adsorption capacity made D113-Fe3+ comparable to all reported glyphosate adsorbents.
摘要：
Based on the chemical modifications of the few-layer boron nitride nanosheets (BNNSs) prepared by ball milling, several BNNS/polyurethane (PU) composite films (non-laminated films) were prepared by solution blending. It showed that the modified BNNSs (M-BNNSs) in PU matrices assembled into boron nitride (BN) micro-flakes and mildly orientated along the film planes. Then, an approach of multi-folding and multi-laminating further pro-moted the orientation, stacking and connection of BN micro-flakes, by which a three-dimensional (3D) BN network composed of lamellar BN skeleton and a small number of BN linkers was in-situ constructed in the PU composite films (laminated films). For the existence of a continuous heat conductive channel based on the 3D BN network, the thermal conductivities (TCs) of the laminated films were obviously enhanced compared to the corresponding non-laminated films. The incorporation of M-BNNSs further improved the electrical insulation of the laminated films. When the M-BNNS content was 50 wt%, the in-plane TC of the laminated film reached 23.80 W/m & sdot;K. The laminated film with M-BNNS content of 30 wt% showed high TC, good flexibility, and outstanding electrical insulation, who is a promising candidate for the flexible thermal management materials.
