摘要
以固态Sb_(2)S_(3)/碳纳米管(carbon nanotubes,CNTs)为阴极,石墨为阳极,在氯化胆碱-乙二醇低共熔溶剂中直接电解制备Sb/CNTs.采用循环伏安法研究了固态Sb_(2)S_(3)的电化学还原行为,并系统研究了电解电压、电解时间及温度对固态Sb_(2)S_(3)电脱硫的影响.循环伏安法结果表明,低共熔溶剂中固态Sb_(2)S_(3)可被直接电化学还原为金属Sb且固态Sb_(2)S_(3)被电化学还原为金属Sb的反应是一步还原过程.XRD,EDS结果表明,电解电压越大,电解时间越长,固态Sb_(2)S_(3)的电脱硫越彻底.353 K温度下2.4 V电压电解6 h后固态Sb_(2)S_(3)/CNTs可被完全电化学还原为Sb/CNTs.SEM结果表明,电解电压越大,电解产物颗粒越小,表面孔隙越大.所得结果可为低温甚至室温直接电化学还原固态硫化物制备金属提供一种新路径.
Sb/CNTs(carbon nanotubes)nanotubes were prepared by electrolysis in choline chloride-ethylene glycol eutectic solvent using solid Sb_(2)S_(3)/CNTs as cathode and graphite as anode.The electrochemical reduction behavior of solid Sb_(2)S_(3) was studied by cyclic voltammetry and the effects of electrolysis voltage,electrolysis time and temperature on the electrodesulfurization of solid-state Sb_(2)S_(3) were systematically investigated.The cyclic voltammetry results show that solid-state Sb_(2)S_(3) can be directly electrochemically reduced metallic Sb in the deep eutectic solvent,and the electrochemical reduction of solid-state Sb_(2)S_(3) to metallic Sb is a one-step reduction process.The XRD and EDS results indicate that increasing the electrolysis voltage and extending the electrolysis time lead to more comprehensive electro-desulfurization of solid-state Sb_(2)S_(3).After electrolysis at a voltage of 2.4 V for 6 h at 353 K,solid-state Sb_(2)S_(3)/CNTs can be completely electrochemically reduced to Sb/CNTs.SEM results indicate that as the electrolysis voltage increases,the particles of the electrolysis product become smaller and the surface porosity increases.The findings provide a novel pathway for the direct electrochemical reduction of solid sulfides to metals at low temperatures and even at room temperature.
作者
邓逸凡
李敏
薛伟健
高炳亮
DENG Yi-fan;LI Min;XUE Wei-jian;GAO Bing-liang(Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Northeastern University,Shenyang 110819,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)
出处
《东北大学学报(自然科学版)》
北大核心
2025年第2期50-56,共7页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51904068)
中央高校基本科研业务费专项资金资助项目(N2325023)
辽宁省自然科学基金资助项目(2023-MSBA-091)
关键词
低共熔溶剂(DES)
硫化锑
锑
电化学还原
deep eutectic solvent(DES)
antimony sulfide
antimony
electrochemical reduction
作者简介
邓逸凡(1998-),男,江西宜春人,东北大学硕士研究生;高炳亮(1974-),男,新疆阜康人,东北大学教授,博士生导师.
