石墨烯-银电极上乙腈中电还原CO_(2)合成碳酸二甲酯  

Synthesis of Dimethyl Carbonate by Electroreduction of Carbon Dioxide inAcetonitrile on Graphene-Silver Electrode

作　　者：匡勇斌 喻淅 杨淼 冯秋菊 KUANG Yongbin;YU Xi;YANG Miao;FENG Qiuju(College of Pharmacy,Jishou University,Jishou 416000,Hunan China)

机构地区：[1]吉首大学药学院,湖南吉首416000

出　　处：《吉首大学学报（自然科学版）》2023年第4期69-74,共6页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(21402063);湖南省自然科学基金资助项目(2015JJ6091);大学生研究性创新实验项目(JDCX2021554)。

摘　　要：采用改进的Hummers法制备氧化石墨烯.在常温常压下,用电化学沉积法,将石墨烯和银沉积在导电玻璃上,制备出石墨烯-银复合材料.在乙腈溶液中,以石墨烯-银电极为阴极,电化学还原CO_(2)结合CH3OH和CH3I合成碳酸二甲酯(DMC).在此基础上,探讨了氧化石墨烯不同体积、分散剂不同类型及浓度对石墨烯-银复合材料形貌的影响,不同电解时间对DMC产率的影响.结果表明,当氧化石墨烯添加体积为10 mL,分散剂为PVP且分散剂浓度为0.5 mol/L时,制备的石墨烯-银复合材料形貌较好;当电解电位为-2.0 V,温度为25℃,支持盐浓度为0.1 mol/L,电解时间为10 h时,DMC产率为36.8%,此为最佳实验条件.In this paper,the improved Hummers method was used to prepare graphene oxide(GO).Electrochemical deposition method was used to deposit graphene and silver on conductive glass at room temperature and pressure to prepare graphene-silver composites.Dimethyl carbonate(DMC)was synthesized by electrochemical reduction of carbon dioxide combined with methanol(CH 3OH)and iodide methane(CH 3I)in acetonitrile solution with graphene-silver electrode as cathode.On this basis,the effects of different GO volumes,dispersant types and concentrations on the morphology of graphene-silver composites were discussed,and the effects of different electrolytic time on the DMC yield were also discussed.The results showed that the graphene-silver composites had good morphology when the GO volume was 10 mL,dispersant was PVP and dispersant concentration was 0.5 mol/L.When the electrolytic potential was-2.0 V,the temperature was 25℃,the supporting salt concentration was 0.1 mol/L,and the electrolytic time was 10 h,the yield of DMC was 36.8%,which was the best experimental conditions.

关 键 词：石墨烯 CO_(2) 电化学还原 碳酸二甲酯 

分 类 号：O623.662[理学—有机化学]