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Chinese Journal of Chemical Engineering 2024年第3期67卷 78-88页

作者： Ming Zhou Mengrong Wu Haiwei Yu Xiangjun Zheng Kuan Shen xingmei guo Yuanjun Liu Fu Cao Hongxing Gu Qinghong Kong Junhao Zhang School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Jiangsu Hengshen Co. LtdZhenjiang 212314China School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013China

To address the low conductivity and easy agglomeration of transition metal sulfide nanoparticles,FeCoS_(4) nanoparticles embedded in S-doped hollow carbon(FeCoS_(4)@S-HC)composites were successfully fabricated through a combination of hydrothermal processes and sulfidation *** unique bowlshaped FeCoS_(4)/S-HC composites exhibit excellent structural stability with a high specific surface area of 303.7 m^(2)·g^(-1) and a pore volume of 0.93 cm^(3)·g^(-1).When applied as anode material for lithium-ion batteries,the FeCoS_(4)@S-HC anode exhibits efficient lithium storage with high reversible specific capacity(970.2 mA·h·g^(-1) at 100 mA·g^(-1))and enhanced cycling stability(574 mA·h·g^(-1) at 0.2 A·g^(-1) after 350 cycles,a capacity retention of 84%).The excellent lithium storage is attributed to the fact that the bimetallic FeCoS_(4) nanoparticles with abundant active sites can accelerate the electrochemical reaction kinetics,and the bowl-shaped S-HC structure can provide a stable mechanical structure to suppress volume expansion.

关键词： Bimetallic sulfides Bowl-shaped hollow carbon S doping Buffering volume expand Lithium-ion batteries

F127 assisted fabrication of Ge/r GO/CNTs nanocomposites with three-dimensional network structure for efficient lithium storage

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Chinese Chemical Letters 2024年第9期35卷 447-451页

作者： Hui Gu Mingyue Gao Kuan Shen Tianli Zhang Junhao Zhang Xiangjun Zheng xingmei guo Yuanjun Liu Fu Cao Hongxing Gu Qinghong Kong Shenglin Xiong School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Key Laboratory of the Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJi’nan 250100China Jiangsu Hengshen Co. Ltd.Zhenjiang 212314China School of the Environment and Safety engineering Jiangsu UniversityZhenjiang 212013China

To solve the volume expansion and poor electrical conductivity of germanium-based anode materials,Ge/rGO/CNTs nanocomposites with three-dimensional network structure are fabricated through the dispersion of polyethylene-polypropylene glycol(F127)and reduction of *** interesting phenomenon is discovered that F127 can break GeO_(2)polycrystalline microparticles into 100 nm nanoparticles by only physical interaction,which promotes the uniform dispersion of GeO_(2)in a carbon network structure composed of graphene(rGO)and carbon nanotubes(CNTs).As evaluated as anode material of Lithium-ion batteries,Ge/rGO/CNTs nanocomposites exhibit excellent lithium storage *** initial specific capacity is high to 1549.7 mAh/g at 0.2 A/g,and the reversible capacity still retains972.4 mAh/g after 100 *** improved lithium storage performance is attributed to that Ge nanoparticles can effectively slow down the volume expansion during charge and discharge processes,and threedimensional carbon networks can improve electrical conductivity and accelerate lithium-ion transfer of anode materials.

关键词： F127 assisted fabrication Ge/rGO/CNTs nanocomposites Three-dimensional carbon network Lithium-ion batteries Cycle stability

Recent progress on preparation and applications of layered double hydroxides

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Chinese Chemical Letters 2022年第10期33卷 4428-4436页

作者： Mengting Duan Shanjing Liu Qiming Jiang xingmei guo Junhao Zhang Shenglin Xiong School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Key Laboratory of Colloid and Interface Chemistry Ministry of Educationand School of Chemistry and Chemical EngineeringShandong UniversityJi'nan 250100China

The properties of layered double hydroxides(LDHs),including the adjustability of cations in host layers,exchangeability of anions between layers,and tunability of the crystal structure,render them unique characteristics in preparation and *** to the structural characteristics of LDHs,this work analyzes the research status,advantages and disadvantages of the synthetic methods for LDHs,including hydrothermal,electrodeposition,co-precipitation and anion exchange *** addition,the application status and prospects are reviewed,such as photo/electrocatalysis,electrochemical energy storage,magnetic materials,pollutant adsorption,and other ***,the critical issues and solutions in the developing process of LDHs are analyzed and proposed.

关键词： Layered double hydroxides Anion exchangeability Structural adjustability Performance tunability

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“六位一体”学科竞赛教学体系的构建与实践

化工高等教育 2024年第4期41卷 16-20,57页

作者：李旭凯郭杏妹曾丽璇华南师范大学环境学院广东广州510006

学科竞赛已成为培养大学生实践创新能力的重要抓手,如何依托学科竞赛提高大学生的实践创新能力,是高校实践教学研究的重要课题。高校学科竞赛取得了长足的发展,但也存在一些现实问题。本文以华南师范大学的环境学科为例,分析学科竞赛存... 详细信息

学科竞赛已成为培养大学生实践创新能力的重要抓手,如何依托学科竞赛提高大学生的实践创新能力,是高校实践教学研究的重要课题。高校学科竞赛取得了长足的发展,但也存在一些现实问题。本文以华南师范大学的环境学科为例,分析学科竞赛存在的主要问题,并从教学体系融合、竞赛平台建设、赛前培训强化、教师技能提升、反馈机制建设、文化氛围营造等六个方面构建了“六位一体”的学科竞赛教学体系,切实提高了大学生的实践创新能力。

关键词：学科竞赛教学体系 “六位一体” 环境学科

High N-doped hierarchical porous carbon networks with expanded interlayers for efficient sodium storage

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Nano Research 2020年第10期13卷 2862-2868页

作者： Dongqin Su Man Huang Junhao Zhang xingmei guo Jiale Chen Yanchun Xue Aihua Yuan Qinghong Kong School of Envronmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013China

Sodium-ion batteries (SIBs) have been attracting considerable attention as a promising candidate for large-scale energy storage because of the abundance and low-cost of sodium resources. However, lack of appropriate anode materials impedes further applications. Herein, a novel self-template strategy is designed to synthesize uniform flowerlike N-doped hierarchical porous carbon networks (NHPCN) with high content of N (15.31 at.%) assembled by ultrathin nanosheets via a self-synthesized single precursor and subsequent thermal annealing. Relying on the synergetic coordination of benzimidazole and 2-methylimidazole with metal ions to produce a flowerlike network, a self-formed single precursor can be harvested. Due to the structural and compositional advantages, including the high N doping, the expanded interlayer spacing, the ultrathin two-dimensional nano-sized subunits, and the three-dimensional porous network structure, these unique NHPCN flowers deliver ultrahigh reversible capacities of 453.7 mAh·g^−1 at 0.1 A·g^−1 and 242.5 mAh·g^−1 at 1 A·g^−1 for 2,500 cycles with exceptional rate capability of 5 A·g^−1 with reversible capacities of 201.2 mAh·g^−1. The greatly improved sodium storage performance of NHPCN confirms the importance of reasonable engineering and synthesis of hierarchical carbon with unique structures.

关键词： hierarchical porous carbon networks high N doping expanded interlayer spacing anode sodium-ion batteries

KOH-assisted aqueous synthesis of bimetallic metal-organic frameworks and their derived selenide composites for efficient lithium storage

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矿物冶金与材料学报：英文版 2023年第4期30卷 601-610页

作者： Shuya Zhang Yanchun Xue Yutang Zhang Chengxing Zhu xingmei guo Fu Cao Xiangjun Zheng Qinghong Kong Junhao Zhang Tongxiang Fan School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Materials Science and Engineering Shanghai Jiaotong UniversityShanghai 200240China School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013China Foshan(Southern China)Institute for New Materials Foshan 528200China

To solve low efficiency,environmental pollution,and toxicity for synthesizing zeolitic imidazolate frameworks(ZIFs)in organic solvents,a KOH-assisted aqueous strategy is proposed to synthesize bimetallic ZIFs polyhedrons,which are used as precursors to prepare bimetallic selenide and N-doped carbon(NC)*** them,Fe–Co–Se/NC retains the three-dimensional(3D)polyhedrons with mesoporous structure,and Fe–Co–Se nanoparticles are uniform in size and evenly *** assessed as anode material for lithium-ion batteries,Fe–Co–Se/NC achieves an excellent initial specific capacity of 1165.9 m Ah·g^(-1)at 1.0 A·g^(-1),and the reversible capacity of Fe–Co–Se/NC anode is 1247.4 m Ah·g^(-1)after 550 *** is attributed to that the uniform composite of bimetallic selenides and N-doped carbon can effectively tune redox active sites,the stable 3D structure of Fe–Co–Se/NCs guarantees the structural stability and wettability of the electrolyte,and the uniform distribution of Fe–Co–S nanoparticles in size esuppresses the volume expansion and accelerates the electrochemical reaction kinetics.

关键词： potassium hydroxide assisted aqueous strategy bimetallic zeolitic imidazolate frameworks bimetallic selenide lithium-ion batteries long cycle performance

A channel-confined strategy for synthesizing CoN-CoO_(x)/C as efficient oxygen reduction electrocatalyst for advanced zinc-air batteries

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Nano Research 2022年第3期15卷 2092-2103页

作者： xingmei guo Wei Zhang Jing Shi Mengting Duan Shanjing Liu Junhao Zhang Yuanjun Liu Shenglin Xiong Qinghong Kong School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Key Laboratory of Colloid and Interface Chemistry Ministry of Educationand School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013China

Designing hybrid transition metal compounds with optimized electronic structure and firmly dispersing them on a matrix to avoid aggregation and shedding is of great significance for achieving high electrocatalytic ***,an adsorption-complexation-calcination strategy based on channel confining effect is explored to obtain CoN-CoO_(x)hybrid nanoparticles uniformly dispersed in mesoporous *** CoN-CoO_(x)/C composite exhibits excellent electrocatalytic behavior for oxygen reduction reaction(ORR).The half-wave potential and durability are comparable or superior to those of Pt/*** applying as cathode catalyst for a primary zinc-air battery,the open-circuit voltage and peak power density reach up to 1.394 V and 109.8 mW·cm^(−2),respectively.A high gravimetric energy density of 950.3 Wh·kgZn^(−1) is delivered at 10 mA·cm^(−2) with good rate capability and *** functional theory(DFT)calculation demonstrates the favorable ORR intermediate adsorbability and metallic characteristics of CoN grains with oxide hybridization to optimize the electronic *** work provides a facile adjustable approach for obtaining highly dispersed nanoparticles with controllable hybrid composition on a substrate,which is important for future design and optimization of high-performance electrocatalysts.

关键词： channel-confined complexation CoN-CoO_(x) mesoporous carbon oxygen reduction reaction zinc-air battery

Ultralong nitrogen/sulfur Co-doped carbon nano-hollowsphere chains with encapsulated cobalt nanoparticles for highly efficient oxygen electrocatalysis

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Carbon Energy 2023年第8期5卷 15-30页

作者： Wei Zhang xingmei guo Cong Li Jiang-Yan Xue Wan-Ying Xu Zheng Niu Hongwei Gu Carl Redshaw Jian-Ping Lang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhouChina State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghaiChina College of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiangChina Department of Chemistry University of HullHullUK

The development of simple and effective strategies to prepare electrocatalysts,which possess unique and stable structures comprised of metal/nonmetallic atoms for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),is currently an urgent ***,an efficient bifunctional electrocatalyst featured by ultralong N,S-doped carbon nano-hollow-sphere chains about 1300 nm with encapsulated Co nanoparticles(Co-CNHSCs)is *** multifunctional catalytic properties of Co together with the heteroatom-induced charge redistribution(i.e.,modulating the electronic structure of the active site)result in superior catalytic activities toward OER and ORR in alkaline *** optimized catalyst Co-CNHSC-3 displays an outstanding electrocatalytic ability for ORR and OER,a high specific capacity of 1023.6 mAh gZn^(-1),and excellent reversibility after 80 h at 10mA cm^(-2)in a Zn-air battery *** work presents a new strategy for the design and synthesis of efficient multifunctional carbon-based catalysts for energy storage and conversion devices.

关键词： Co nanoparticles N S co-doping oxygen electrocatalysts rechargeable Zn-air batteries ultralong carbon nano-hollow-sphere chains

KOH-assisted aqueous synthesis of ZIF-67 with high-yield and its derived cobalt selenide/carbon composites for high-performance Li-ion batteries

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Chinese Journal of Chemical Engineering 2023年第5期57卷 214-223页

作者： Kai Xue Yanchun Xue Jing Wang Shuya Zhang xingmei guo Xiangjun Zheng Fu Cao Qinghong Kong Junhao Zhang Zhong Jin School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China MOE Key Laboratory of Mesoscopic Chemistry MOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key Laboratory of Advanced Organic MaterialsSuzhou Tierui New Energy Technology Co.LtdSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013China

To solve the environmental pollution and low yield during the sythesis of zeolitic imidazolate frameworks(ZIFs)and their derived materials,a KOH-assisted aqueous strategy is proposed to synthesize cobalt zeolitic imidazolate framework(ZIF-67)polyhedrons,which are used as precursors to prepare cobalt selenide/carbon composites with different crystal phases(Co_(0.85)Se,CoSe_2).When evaluated as anode material for lithium ion batteries,Co_(0.85)Se/C composites deliver a reversible capacity of 758.7 m A·h·g^(-1)with a capacity retention rate of 90.5%at 1.0 A·g^(-1)after 500 cycles,and the superior rate capability is 620 m A·h·g^(-1)at 2.0 A·g^(-1).The addition of KOH accelerates the production of ZIF-67 crystals by boosting deprotonation of dimethylimidazole,resulting in rapid growth and structures transition from two-dimensional to three-dimensional of ZIF-67 in aqueous solution,which greatly promotes the application of MOFs in the field of energy storage and conversion.

关键词： KOH-assisted strategy Synthesis Aqueous solution Nanostructure Lithium-ion batteries Long cycle performance

Cobalt-based multicomponent nanoparticles supported on N-doped graphene as advanced cathodic catalyst for zinc-air batteries

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International Journal of Minerals,Metallurgy and Materials 2022年第12期29卷 2212-2220页

作者： Shanjing Liu Xiaohan Wan Yue Sun Shiqi Li xingmei guo Ming Li Rui Yin Qinghong Kong Jing Kong Junhao Zhang School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013China China Aerospace Components Engineering Center China Academy of Space TechnologyBeijing 100094China

To improve the efficiency of cathodic oxygen reduction reaction(ORR)in zinc-air batteries(ZABs),an adsorption-complexation-calcination method was proposed to generate cobalt-based multicomponent nanoparticles comprising Co,Co_(3)O_(4)and CoN,as well as numerous N heteroatoms,on graphene nanosheets(Co/Co_(3)O_(4)/CoN/NG).The Co/Co_(3)O_(4)/CoN nanoparticles with the size of less than 50 nm are homogeneously dispersed on N-doped graphene(NG)substrate,which greatly improve the catalytic behaviors for *** results show that the half-wave potential is as high as 0.80 V *** and the limiting current density is 4.60 mA·cm^(−2),which are close to those of commercially available platinum/carbon(Pt/C)*** as cathodic catalyst for ZABs,the battery shows large specific capacity and open circuit voltage of 843.0 mAh∙g^(−1) and 1.41 V,*** excellent performance is attributed to the efficient two-dimensional structure with high accessible surface area and the numerous multiple active sites provided by highly scattered Co/Co_(3)O_(4)/CoN particles and doped nitrogen on the carbon matrix.

关键词： adsorption-complexation-calcination cobalt-based multicomponent nanoparticles N-doped graphene oxygen reduction reaction zinc-air batteries