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Journal of Advanced Ceramics 2024年第5期13卷 641-651页

作者： Xi Yan Hongjiang Pan Yixin Zhang Tianyu Yang Yangwei Wang Kun Huang Chongyu Wang Jing Feng Zhenhua Ge Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China

In situ phase separation precipitates play an important role in enhancing the thermoelectric properties of copper sulfides by suppressing phonon *** this study,Cu1.8S composites were fabricated by melting reactions and spark plasma *** complex structures,namely,micron-PbS,Sb_(2)S_(3),nano-FeS,and multiscale pores,originate from the introduction of FePb_(4)Sb_(6)S_(14)into the Cu1.8S *** effective element(Fe)doping and multiscale precipitates,the Cu_(1.8)S+0.5 wt%FePb_(4)Sb_(6)S_(14)bulk composite reached a high dimensionless figure of merit(ZT)value of 1.1 at 773 ***,the modulus obtained for this sample was approximately 40.27 GPa,which was higher than that of the pristine *** study provides a novel strategy for realizing heterovalent doping while forming various precipitates via in situ phase separation by natural minerals,which has been proven to be effective in improving the thermoelectric and mechanical performance of copper sulfides and is worth promoting in other thermoelectric systems.

关键词： in situ precipitates jamesonite natural mineral thermoelectric copper sulfides

copper diffusion related phase change and voltage decay in CuS cathode

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Nano Research 2023年第6期16卷 8497-8503页

作者： Jian Zou Zhenrui Wu Ruilin Tang Zhenzhen Ren Xiaobin Niu Liping Wang School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China School of Engineering Faculty of Applied ScienceThe University of British ColumbiaKelowna V1V 1V7Canada

copper sulfide(CuS)is a promising cathode for lithium-ion batteries(LIBs)due to its impeccable theoretical energy density(~1015 Wh·kg^(−1) and 4743 Wh·L^(−1)).However,it suffers from voltage decay leaded energy density loss and low energy efficiency,which hinders its *** this work,with combined ex-situ/in-situ X-ray diffraction(XRD)and electrochemical analysis,we explore detailed degradation *** the voltage decay,it is attributed to a spontaneous reaction between CuS cathode and copper current collector(Cu CC).This reaction leads to energy density loss and active materials degradation(CuS→Cu_(1.81)S).As for energy efficiency,CuS undergoes a series of phase *** main phase transition processes are CuS→α-LiCuS→Li_(2−x)Cu_(x)S+Cu→Li_(2)S+Cu for discharge;Li_(2)S+Cu→Li_(2−x)Cu_(x)S→β-LiCuS→CuS for ***,α-LiCuS,β-LiCuS,and Li_(2−x)CuxS are newly identified *** phase changes are driven by topotactic-reaction-related copper diffusion and *** work demonstrates the significance of transition-metal diffusion in the intermediates formation and phase change in conversion-type materials.

关键词： copper sulfides conversion-type materials copper diffusion Li-free cathode lithium metal battery

Chalcocite(bio)hydrometallurgy-current state,mechanism,and future directions:A review

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Chinese Journal of Chemical Engineering 2022年第1期35卷 109-120页

作者： Shichao Yu Rui Liao Baojun Yang Chaojun Fang Zhentang Wang Yuling Liu Baiqiang Wu Jun Wang Guanzhou Qiu School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083China Key Lab of Biohydrometallurgy of Ministry of Education Changsha 410083China College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454000China Wanbao Mining Ltd. Beijing 100053China

There has been a strong interest in technologies suited for mining and processing of low-grade ores because of the rapid depletion of mineral resources in the *** most cases,the extraction of copper from such raw materials is achieved by applying the leaching ***,its low extraction efficiency and the long extraction period limit its large-scale commercial applications in copper recovery,even though bioleaching has been widely employed commercially for heap and dump bioleaching of secondary copper sulfide *** the technical challenges requires a better understanding of leaching kinetics and on-site microbial ***,this paper reviews the current status of main commercial biomining operations around the world,identifies factors that affect chalcocite dissolution both in chemical leaching and bioleaching,summarizes the related kinetic research,and concludes with a discussion of two on-site chalcocite heap leaching ***,the challenges and innovations for the future development of chalcocite hydrometallurgy are presented in the end.

关键词： Chalcocite Bioleaching Heap leaching Kinetics copper sulfides Hydrometallurgy

High area-capacity Mg batteries enabled by sulfur/copper integrated cathode design

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Journal of Energy Chemistry 2022年第9期31卷 370-378,I0011页

作者： Zhenfang Zhou Aobing Du Weijie Kong Zhuang Chen Zhonghua Zhang Bingbing Chen Yitao He Shanmu Dong Zhenjiang Li Guicun Li Guanglei Cui College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101ShandongChina Department of Energy Science and Engineering Nanjing Tech UniversityNanjing 211816JiangsuChina Department of Physics Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

Rechargeable Mg batteries potentially display lower cost and competitive energy density compared with their Li-ion ***,the practical implementation of high area-capacity cathodes still remains a formidably challenging *** work presents the sulfur/copper integrated cathodes fabricated by the conventional blade-coating process and slurry-dipping *** sulfur/copper foil integrated cathodes deliver a high area-capacity of 2.6 mAh cm^(-2)after 40 cycles,while the sulfur/copperfoam integrated cathode exhibits an ultrahigh area-capacity of 35.4 mAh cm^(-2),corresponding to 743.1 Wh L^(-1)at the electrode level(1.5 times higher than the LiCoO_(2)-graphite system).The in-situ formed copper sulfide intermediates with sufficient cation defects can act as functional intermediates to regulate the sulfur electrochemistry during the first discharge *** subsequent cycles are operated by the reversible displacement reaction between Mg-ions and copper sulfide active *** particular,the copper ions prefer to extrude along the[001]direction in copper sulfides lattice and simultaneously the rock-salt MgS crystals are ***,the nonuniform surface topography of the cycled Mgmetal anode,caused by the spatial inhomogeneity in current distribution,is demonstrated to lead to the battery performance degradation for high area-capacity Mg batteries.

关键词： Magnesium batteries Sulfur cathode Displacement reaction copper sulfides

Multiscale architectures boosting thermoelectric performance of copper sulfide compound

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Rare Metals 2021年第8期40卷 2017-2025页

作者： Xin-Qi Chen Sheng-Jie Fan Chao Han Tian Wu Lian-Jun Wang Wan Jiang Wei Dai Jian-Ping Yang School of Physics and Mechanical and Electrical Engineering Hubei Engineering Technology Research Center of Environmental Purification MaterialsInstitute of Materials Research and EngineeringHubei University of EducationWuhan430205China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China Institute for Superconducting and Electronic Materials University of WollongongNorth WollongongNSW2500Australia

Owing to their high performance and earth abundance,copper sulfides(Cu_(2-x)S)have attracted wide attention as a promising medium-temperature thermoelectric *** and grain-boundary engineering are explored to tune the electrical transport and phonon scattering of Cu_(2-x)S based on the liquid-like copper *** multiscale architecture-engineered Cu_(2-x)S are fabricated by a room-temperature wet chemical synthesis combining mechanical mixing and spark plasma *** observed electrical conductivity in the multiscale architecture-engineered Cu_(2-x)S is four times as much as that of the Cu_(2-x)S sample at 800 K,which is attributed to the potential energy filtering effect at the new grain ***,the multiscale architecture in the sintered Cu_(2-x)S increases phonon scattering and results in a reduced lattice thermal conductivity of 0.2 W·m^(-1)·K^(-1) and figure of merit(zT)of 1.0 at 800 *** a zT value is one of the record values in copper sulfide produced by chemical *** results suggest that the introduction of nanostructure and formation of new interface are effective strategies for the enhancement of thermoelectric material properties.

关键词： Thermoelectric properties copper sulfides Room-temperature synthesis Nanostructure Semiconductor

Precise phase adjustment and antibacterial property of copper sulfide particles in confined mesoporous silica nanoreactor

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Particuology 2024年第2期85卷 113-121页

作者： Shiyu Xu Jinyong Wu Zhongzhen Ren Dechao Niu Low Dimensional Materials Chemistry Laboratory Key Laboratory for Ultrafine Materials of Ministry of EducationFrontier Science Center of the Materials Biology and Dynamic ChemistryShanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

Bacteria-caused wound infection greatly threatens human health,thus developing an efficient and safe antibacterial agent without drug resistance is still a great ***,a confined vulcanization strategy is proposed to construct copper sulfides-loaded dual-mesoporous silica nanospheres(Cux-Sy@DMSNs)with various crystal phases for reactive oxygen species(ROS)-mediated and photothermal antibacterial *** the pore confinement of DMSNs,the crystal phases of copper sulfides including CuS,Cu_(9)S_(5)and Cui.96S can be easily controlled by changing the vulcanization *** relationships between the crystal phases and photothermal properties as well as peroxidase-like activity of copper sulfides were systematically *** show that the obtained CuS@DMSNs exhibited higher photothermal ability with remarkable photothermal conversion efficiency of 36.86%in the second near-infrared region(NIR-II)and better peroxidase-like activity,compared to those of Cu_(9)S_(5)@DMSNs and Cu_(1.96)S@*** a result,the in vitro experiments showed the good antibacterial effect against both gram-negative *** and gram-positive *** under 1064 nm laser irradiation and the presence of H_(2)O_(2).Besides,the CCK-8 assay indicated that CuS@p-DMSNs have minimal cytotoxicity against normal human umbilical vein endothelial cells at the ranged ***,the resultant CuS@p-DMSNs could act as a promising antibacterial agent for deep wound bacterial infection treatment.

关键词： copper sulfides Mesoporous silica Photothermal Reactive oxygen species Antibacterial agent

Smart CU1.75S nanocapsules with high and stable photothermal efficiency for NIR photo-triggered drug release

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Nano Research 2015年第12期8卷 4038-4047页

作者： Sheng Huang Jing Liu Qian He Hongli Chen Jiabin Cui Suying Xu Yuliang Zhao Chunying Chen Leyu Wang State Key Laboratory of Chemical Resource Engineering Beijing Key Laboratory of Environmentally Harmful Chemical Analysis Beijing University of Chemical Technology Beijing 100029 China CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety National Center for Nanoscience and Technology of China and Institute of High Energy Physics Chinese Academy of Sciences Beijing 100190 China

Thermosensitive drug delivery systems （DDSs） face major challenges, such as remote and repeatable control of in vivo temperature, although these can increase the therapeutic efficacy of drugs. To address this issue, we coated near- infrared （NIR） photothermal Cu175S nanocrystals with pH/thermos-sensitive polymer by in situ polymerization. The doxorubicine （DOX） loading content was up to 40 wt.%, with less than 8.2 wt.% of DOX being leaked under normal physiological conditions （pH = 7.4, 37 ~C） for almost 48 h in the absence of NIR light. These nanocapsules demonstrate excellent photothermal stability by continuous long- term NIR irradiation. Based on the stable and high photothermal efficiency （55.8%）, pre-loaded drugs were released as desired using 808-nm light as a trigger. Both in vitro and in vivo antitumor therapy results demonstrated that this smart nanoplatform is an effective agent for synergistic hyperthermia-based chemotherapy of cancer, demonstratin~ remote and noninvasive control.

关键词： copper sulfides near infrared light phothermal therapy drug release

Electrochemical Characteristics of Natural Mineral Covellite

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Open Journal of Metal 2012年第3期2卷 60-67页

作者： Mirjana Rajcic-Vujasinovic Zoran Stevic Sanja Bugarinovic Technical Faculty in Bor University of BelgradeBorSerbia Mining and Metallurgy Institute Zeleni BulevarBorSerbia

Electrochemical characteristics of covellite (CuS) are of importance from flotation and metallurgical point of view, as well as due to its potential application in solid state solar cells and in photocatalytic reactions. Also, the compound CuS appears as an intermediary product or a final product in electrochemical oxidation reactions of chalcocite (Cu2S) which exhibits supercapacitor characteristics. Natural copper mineral covellite has been investigated in inorganic sulfate acid electrolytes, as well as in strong alkaline electrolyte. Physical properties of covellite were characterized by X-ray diffraction (XRD) and the active surface was examined by optical and electron microscopy (EM) before and after oxidation in galvanostatic regime. Different electrochemical methods (galvanostatic, potentiostatic, cyclic voltammetry and electrochemical impedance spectroscopy - EIS) have been used. The capacitance of around 21 Fcm-2 (geometric area), serial resistance of about 90 Ωcm2 and leakage resistance of about 1200 Ωcm2 have been measured in 1 M H2SO4. The addition of cupric ions in sulfate electrolyte leads to the significant increasing of the capacitance, but having the increase of self-discharge as a negative side phenomenon. The capacitance of around 6.7 Fcm-2 (geometric area), serial resistance of about 80 Ωcm2 and leakage resistance of about 380 Ωcm2 have been measured in 6 M KOH.

关键词： Covellite Capacitance copper sulfides Electrochemical Characterization Solar Cells