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：
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.
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).
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 KH2PO4/H3PO4 (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.
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 SbF3 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 Na3Sb, 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.
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.
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.
摘要：
随着专业认证和“双碳”战略的推进,化工领域对于可持续发展的要求越来越高。在此背景下,本校的《化工热力学》教学改革从理论教学和实验教学两方面出发,采取案例教学、创新实验、多元评价等举措,将理论知识与工程实践紧密结合,以此培...展开更多 随着专业认证和“双碳”战略的推进,化工领域对于可持续发展的要求越来越高。在此背景下,本校的《化工热力学》教学改革从理论教学和实验教学两方面出发,采取案例教学、创新实验、多元评价等举措,将理论知识与工程实践紧密结合,以此培养学生的绿色发展意识和创新能力,提升专业素养、实际操作和解决复杂问题的能力,从而为“双碳”战略的实施提供人才支持,为培养适应未来化工行业发展需求的优秀人才作出贡献。With the advancement of professional certifications and the implementation of the “dual carbon” strategy, the chemical industry is placing increasing demands on sustainable development. Under the background, our school’s reform in teaching “Chemical Thermodynamics” focuses on both theoretical and experimental teaching. It incorporates case studies, innovative experiments, and diverse assessments, closely linking theoretical knowledge with engineering practice. This approach aims to cultivate students’ awareness of green development and innovation capabilities, and enhance their professional competence, practical skills, and problem-solving abilities. Ultimately, it aims to support the implementation of the “dual carbon” strategy by nurturing talent and contributing to the development of excellent professionals who can meet the future needs of the chemical industry.收起
摘要：
N-doped porous carbons of C(N)-n were prepared for remarkable rate capacitive properties and excellent CO2 capture performance using Chitosan as both carbon and nitrogen sources. At the edge of amorphous C(N)-n materials, a part of atoms are arranged ordered on account of the graphitization. Besides, the optimal ID/IG ratio is 1.02. In the optimized sample of C(N)-700, N element exists in the framework as pyridinic N, pyrrodic N, quaternary N, oxidized N and the proportion is 7.3%. Moreover, the specific surface area and pore volume reach 243 m2/g and 0.633 cm3/g, respectively. In 6 M KOH, the C(N)-700 material generates a pseudocapacitance along with the double-layer capacitance (EDLC). When the current density is 0.2 A/g, the discharge capacity and energy density are 502 F/g and 6.5 Wh/kg, respectively. Compared with the discharge capacity at 0.2 A/g, it still keeps 61.7% at 40 A/g. The superior electrochemical performance has a closely connection with the huge pore volume, surface area and the doping of N species, which afford rapid ions migration, abundant residence sites and outstanding pseudocapacitance properties. CO2 capture behavior on the N-doped carbons complie with Bangham mode. When the system temperature is 25 degrees C, the C(N)-700 material achieves an appreciable capture amount of 4.25 mmol/g in a stream of 40 mL/min. At room temperature, the adsorption capacity ratios of CO2/ N2 and CO2/O2 are 2.6 and 3.7, respectively. The superior CO2 adsorption performance is also closely in connection with the unique pore structure and plentiful N affinity places.
