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Nitrogen-rich three-dimensional porous carbon mosaicked Na_(4)Ge_(9)O_(20)as anode material for high-performance lithium-ion batteries

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Rare Metals 2023年第2期42卷 438-448页

作者： Hao-Miao Zhang Jing chen Rou Lu Cong-Ge Lu shuang Zhou Zhi Chang An-qiang Pan School of Materials Science and Engineering Central South UniversityChangsha410083China School of Physics and Materials Nanchang UniversityNanchang330031China

Germanium-based material has attracted numerous attentions and been regarded as a promising anode material for lithium-ion batteries due to its high theoretical ***,drastic pulverization and rapid capacity fading caused by large volume variation during cycling limit its practical *** this work,three-dimensional N-doped carbon framework-wrapped Na_(4)Ge_(9)O_(20)nanoparticles(3D Na_(4)Ge_(9)O_(20)@N-C)have been synthesized via freeze-drying approach with NaCl as both template and sodium source for *** employment of NaCl has two special roles:on the one hand,the NaCl crystals act as template and facilitate the formation of 3D porous structure,while on the other hand,the NaCl crystals serving as sodium source and support the ion exchange between NaCl and GeO_(2)promote the formation of Na_(4)Ge_(9)O_(20).Benefiting from the unique method,the prepared 3D Na_(4)Ge_(9)O_(20)@N-C not only suppresses the volume change by using carbon as buffer layers but also demonstrates an improved electronic conductivity and a shortened ionic *** utilized as an anode material for LIBs,the 3D Na_(4)Ge_(9)O_(20)@N-C composites deliver high reversible capacity(896.2 mAh·g^(-1)at0.1 A·g^(-1)after 100 cycles),good cycling stability(520.8 mAh·g^(-1)at 2.0 A·g^(-1)after 400 cycles)and excellent rate performance(636.0 mAh·g^(-1)at 2.0 A·g^(-1)).This work provides a strategy to improve the electrochemical performance of germanium-based anode materials for lithium-ion batteries.

关键词： Germanium-based anode Na_(4)Ge_(9)O_(20) Ndoped carbon Porous nanostructure Lithium-ion batteries(LIBs)

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Surface molecular imprinting on g-C3N4 photooxidative nanozyme for improved colorimetric biosensing

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Chinese Chemical Letters 2019年第12期30卷 2186-2190页

作者： Yuanheng Wu qiang chen shuang Liu Hua Xiao Menglin Zhang Xinfeng Zhang College of Materials and Chemistry&Chemical Engineering Chengdu University of TechnologyChengdu 610059China College of Environment and Ecology Chengdu University of TechnologyChengdu 610059China

Graphitic carbon nitride(g-C3 N4),as a visible-light-active organic semiconductor,has attracted growing attentions in photocatalysis and photoluminescence-based ***,we demonstrated the intrinsic photooxidase activity of g-C3 N4 and then surface molecular imprinting on g-C3 N4 nanozymes was achieved for improved *** blue LED irradiation,the g-C3 N4 exhibited superior enzymatic activity for oxidation of chromogenic substrate like 3,3’,5,5’-tetramethylbenzidine(TMB)without destructive H2 *** oxidation was mainly ascribed to ·O2^-that was generated during light *** surface molecular imprinting on g-C3 N4 can lead to an over 1000-fold alleviation in matrix-interference from serum samples,4-fold improved enzymatic activity as well as enhanced substrate specificity comparing with bare g-C3 N4 during colorimetric ***,the MIP-g-C3 N4 possesses a high affinity to TMB with a Km value of only 22 μmol/L,much lower than other comment nanozymes like AuNPs,Fe3 O4 NPs,*** was successfully applied for detection of cysteine in serum sample with satisfactory recoveries.

关键词： Molecularly imprinted polymer Graphitic carbon nitride Nanoenzyme Colorimetry Biosensing

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A Multi-Objective Optimization Approach for Heat Exchanger Network in Process Industries

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China Petroleum Processing & Petrochemical Technology 2022年第2期24卷 101-111页

作者： Tan qiang chen Yuting Xu Yanyan Ye shuang Xiao Hao Huang Weiguang Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210 University of Chinese Academy of Sciences Beijing 100049 ShanghaiTech University Shanghai 201210 Dalian National Laboratory for Clean Energy Dalian 116023 Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190

To simultaneously improve the quantity and quality of heat recovery in a heat exchanger network(HEN),this study conducts a theory analysis based on the first and second laws of *** the premise of maximizing the heat recovery quantity of HEN,Ġdiss is used as an evaluation index to optimize the quality of heat ***,the total annual cost(TAC)is considered as another optimization objective to ensure the economic feasibility of the HEN.A superstructure-based multi-objective mixed integer non-linear programming approach is put forward to solve the trade-off between minimizingĠdiss and minimizing *** allows for the optimum HEN structure to be obtained.A well-studied example is solved to highlight the benefits of the proposed method.

关键词： heat exchanger network(HEN) heat recovery quantity heat recovery quality economic superstructure

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Design and synthesis of novel 1,3-diene bridged chiral atropoisomeric diphosphine ligands for asymmetric hydrogenation ofα-dehydro amino ketones

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Science China Chemistry 2023年第10期66卷 2847-2851页

作者： Xuefeng Tan shuang Gao Chunyan Yang Qiwei Lang Xiaobing Ding Gen-qiang chen Xumu Zhang Laboratory of Small Molecule Drug Discovery and Synthesis Department of ChemistrySouthern University of Science and TechnologyShenzhen 518055China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518000China Department of Chemistry City University of Hong KongHong Kong 999077China

A series of novel atropisomeric diphosphine ligands termed Tan Phos were designed and synthesized,which has a smaller bite angle compared with that of other ligands such as *** Phos showed high reactivity and enantioselectivity in the rhodiumcatalyzed asymmetric hydrogenation ofα-dehydro amino ketones,and up 99%yield and 99%ee were obtained for a wide range of chiralα-amino ketones.

关键词： diphosphine asymmetric hydrogenation chiral ligand

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Biochar-based materials and their applications in removal of organic contaminants from wastewater:state-of-the-art review

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Biochar 2019年第1期1卷 45-73页

作者： qiang Huang shuang Song Zhe chen Baowei Hu Jianrong chen Xiangke Wang MOE Key Lab of Resources and Environmental System Optimization College of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206People’s Republic of China School of Life Science Shaoxing UniversityHuancheng West Road 508Shaoxing 312000People’s Republic of China College of Geography and Environmental Science Zhejiang Normal UniversityJinhua 321004People’s Republic of China

As a class of famous carbon materials,biochars(BCs)and their derivative materials with excellent physicochemical properties and diversified functionalities present great potential in wastewater treatment *** review focuses on the latest development in reported biochar-based materials as superior adsorbents or catalysts for removing harmful organic contaminants from *** construction and properties of biochar-based materials are briefly introduced at the *** one of the major factors affecting the properties of BCs,the wide diversity of feedstocks,such as agricultural and forest residues,industrial by-products as well as municipal wastes,endows BCs different chemical compositions and *** and herbaceous BCs usually have higher carbon contents,larger surface areas and strong aromaticity,which is in favor of the organic contaminant *** by the desire of more cost-effective materials,several types of biochar-based hybrid materials,such as magnetic BC composites(MBC),nanometal/nanometallic oxides/hydroxide BC composites and layered nanomaterial-coated BCs,as well as physically/chemically activated BCs,have also been *** the help of foreign materials,these types of hybrid BCs have excellent capacities to remove a wide range of organic contaminants,including organic dyestuff,phenols and chemical intermediates,as well as pharmaceutically active compounds,from aquatic *** on the different types of biochar-based materials,organic contaminants can be removed by different mechanisms,such as physical adsorption,electrostatic interaction,π-πinteraction and Fenton process,as well as photocatalytic *** summary,the low cost,tunable surface chemistry and excellent physical-chemical properties of BCs allow it to be a potential material in organic contaminant *** combination of BCs with foreign materials endows BCs more functionalities and broader development *** the urge

关键词： Biochar-based materials Water purification Organic contaminants Catalytic degradation Adsorption

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Realizing Majorana fermion modes in the Kitaev model

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Chinese Physics B 2021年第11期30卷 117-130页

作者： Lu Yang Jia-Xing Zhang shuang Liang Wei chen qiang-Hua Wang National Laboratory of Solid State Microstructures and School of Physics Nanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China Institute of Physics Chinese Academy of SciencesBeijing 100190China

We study the possibility to realize a Majorana zero mode that is robust and may be easily manipulated for braiding in quantum computing in the ground state of the Kitaev model in this *** achieve this we first apply a uniform[111]magnetic field to the gapless Kitaev model and turn the Kitaev model to an effective p+ip topological superconductor of *** then study possible vortex binding in such system to a topologically trivial spot in the ground *** consider two cases in the system:one is a vacancy and the other is a fully polarized *** show that in both cases,the system binds a vortex with the defect and a robust Majorana zero mode in the ground state at a weak uniform[111]magnetic *** distribution and asymptotic behavior of these Majorana zero modes are *** Majorana zero modes in both cases decay exponentially in space,and are robust against local perturbations and other Majorana zero modes far away,which makes them promising candidates for braiding in topological quantum computing.

关键词： Kitaev model Majorana fermion modes topological quantum computing

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Comprehensive bibliometric analysis of pharmacotherapy for bipolar disorders:Present trends and future directions

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World Journal of Psychiatry 2025年第1期15卷 153-167页

作者： Bo-Fan chen Li Liu Fang-Zhen Lin Hai-Min Zeng Hai-qiang Huang Chun-Fang Zhang Cong-Cong Liu Xiang chen Jie Peng Yun-Fa Wang Zhi-Lin Wang Bin chen De-Le Liu Yun Liu Zheng-Zheng Li Xin-Xing Zeng The Second Affiliated Hospital Jiangxi Medical CollegeNanchang UniversityNanchang 330006Jiangxi ProvinceChina The Second Clinical Medical College Jiangxi Medical CollegeNanchang UniversityNanchang 330006Jiangxi ProvinceChina Department of Rehabilitation Medicine The Second Affiliated HospitalJiangxi Medical CollegeNanchang UniversityNanchang 330006Jiangxi ProvinceChina Jiangxi Provincial People’s Hospital The First Affiliated Hospital of Nanchang Medical CollegeNanchang 330006Jiangxi ProvinceChina Department of Psychiatry Jiangxi Mental HospitalHospital of Nanchang UniversityNanchang UniversityNanchang 330029Jiangxi ProvinceChina

BACKGROUND Bipolar disorder(BD)is a severe mental illness characterized by significant mood *** drug treatment modalities are crucial for managing *** To analyze the current status and future trends of global research on BD drug treatment over the last *** The Web of Science Core Collection database spanning from 2015 to 2024 was utilized to retrieve literature related to BD drug treatment.A total of 2624 articles were *** visualization and analysis were conducted using CiteSpace,VOSviewer,Pajek,Scimago Graphica,and R-studio bibliometrix to identify RESULTS The United States,China,and the United Kingdom have made the most significant contributions to research on BD drug treatment and formed notable research collaboration *** University of Pittsburgh,Massachusetts General Hospital,and the University of Michigan have been identified as the major research institutions in this *** Journal of Affective Disorders is the most influential journal.A keyword analysis revealed research hotspots related to clinical symptoms,drug efficacy,and genetic mechanisms.A citation analysis identified the management guidelines published by Yatham et al in 2018 as the most cited *** This study provides a detailed overview of the field of BD drug treatment,highlighting key contributors,research hotspots,and future *** study findings can be employed as a reference for future research and policymaking,which may enable further development and optimization of BD pharmacotherapy.

关键词： Bipolar disorder Drug treatment Bibliometric analysis Visualization Mental disorder

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Supersonic flow onto solid wedges, multidimensional shock waves and free boundary problems Dedicated to Professor LI Ta Tsien on the Occasion of His 80th Birthday

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Science China Mathematics 2017年第8期60卷 1353-1370页

作者： chen Gui-qiang School of Mathematical Sciences Fudan University Academy of Mathematics and Systems Science Chinese Academy of Sciences School of Mathematical Sciences University of Chinese Academy of Sciences Mathematical Institute University of Oxford

When an upstream steady uniform supersonic flow impinges onto a symmetric straight-sided wedge,governed by the Euler equations,there are two possible steady oblique shock configurations if the wedge angle is less than the detachment angle—the steady weak shock with supersonic or subsonic downstream flow(determined by the wedge angle that is less than or greater than the sonic angle)and the steady strong shock with subsonic downstream flow,both of which satisfy the entropy *** fundamental issue—whether one or both of the steady weak and strong shocks are physically admissible solutions—has been vigorously debated over the past eight *** this paper,we survey some recent developments on the stability analysis of the steady shock solutions in both the steady and dynamic *** the static stability,we first show how the stability problem can be formulated as an initial-boundary value type problem and then reformulate it into a free boundary problem when the perturbation of both the upstream steady supersonic flow and the wedge boundary are suitably regular and small,and we finally present some recent results on the static stability of the steady supersonic and transonic *** the dynamic stability for potential flow,we first show how the stability problem can be formulated as an initial-boundary value problem and then use the self-similarity of the problem to reduce it into a boundary value problem and further reformulate it into a free boundary problem,and we finally survey some recent developments in solving this free boundary problem for the existence of the PrandtlMeyer configurations that tend to the steady weak supersonic or transonic oblique shock solutions as time goes to *** further developments and mathematical challenges in this direction are also discussed.

关键词： shock wave free boundary wedge problem transonic mixed type Euler equations static stability dynamic stability

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Building a PEG-C@MoSe_(2)@CNT heterostructure via in-situ selenidation as highly reversible anodes for Na+batteries

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Science China Chemistry 2023年第2期66卷 475-491页

作者： Yincai Yang Feng Wang Youwen chen Changmiao chen Shiguo Zhang Zhen-qiang Yu Chak-Tong Au shuang-Feng Yin Renhua Qiu State Key Laboratory of Chemo/Biosensing and Chemometrics Advanced Catalytic Engineering Research Centre of the Ministry of EducationCollege of Chemistry and Chemical EngineeringSchool of Physics&ElectronicsCollege of Material Science and Chemical EngineeringHunan UniversityChangsha410082China College of Information and Mechatronic Engineering Hunan International Economics UniversityChangsha410082China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen518000China

Herein,we describe a simple and efficient method to build C@MoSe_(2)@CNT composites that exhibit good electrochemical performance as anode materials for sodium-ion *** protocol uses commercially available and cheap carbon nanotubes(CNT)as the conductive *** selenide(MoSe_(2)),in-situ-synthesized from Mo-ethylene glycol(poly(ethylene glycol)(PEG,M_(n)≈200))complexes,grows along the CNT with a discontinuous morphology,which creates multiple channels for the insertion of Na^(+).Meanwhile,PEG-C provides a thin carbon coating layer to increase *** PEG-200-2-C/MoSe_(2)/CNTat room temperature,the storage at 2 A g^(-1)is 426 m A h g^(-1)after 500 cycles and 212 m A h g^(-1)after 3,000 *** with pure MoSe_(2),density functional theory calculations indicate that the Na^(+)diffusion barrier in the MoSe_(2)of C@MoSe_(2)@CNT effectively decreases from 0.91 to 0.72 e V,hence promoting the reversibility of the Na^(+)storage.

关键词： sodium-ion batteries MoSe_(2) CNT

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Experimental study of a novel heat sink for distribution level static synchronous compensator cooling

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Science China(Technological Sciences) 2020年第9期63卷 1764-1775页

作者： chen Hao LI qiang MIIT Key Laboratory of Thermal Control of Electronic Equipment School of Energy and Power EingineringNanjing University of Sciene&TechnologyNanjing 210094China

In this paper, a novel heat sink which coupling natural convection and phase transition was designed to meet the cooling requirements of distribution level static synchronous compensator(DSTATCOM). The two inclined evaporation substrates can meet the requirements for the parallel operation of DSTATCOM and the working medium R245 fa was driven by gravity and buoyancy in the heat sink. The influence of filling ratio and heating power on the thermal performance of the heat sink was investigated experimentally and theoretically. The experimental results showed that the filling ratio and heating power had a significant influence on the thermal performance of the heat sink. At the ambient temperature of 25℃, the heat sink could start up successfully at different heating power and filling ratio. Meanwhile, the heat sink achieved good heat dissipation performance as the maximum temperature of two evaporation substrates were 60.14℃ and 67.85℃ while the heating power was 3000 Wand the filling ratio was 80%. The heat transfer resistance between two evaporation substrates and condensation substrates were6.6×10^-3℃/W and 1.2×10^-2℃/W at the same working condition. Additionally, the experimental results showed a good agreement with the calculated results.

关键词： natural convection phase transition thermal performance maximum temperature heat transfer resistance

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