阴离子对电化学剥离制备氧化石墨烯的影响  

Effect of anions on the preparation of graphene oxide by electrochemical exfoliation

作　　者：张玉莹 杨晓峰[1] 王高[2] 朱鹏强 赵艳茹 吴锐 Zhang Yuying;Yang Xiaofeng;Wang Gao;Zhu Pengqiang;Zhao Yanru;Wu Rui(School of Chemistry and Chemical Engineering,North University of China,Taiyuan 030051;School of Information and Communication Engineering,North University of China,Taiyuan 030051)

机构地区：[1]中北大学化学与化工学院,太原030051 [2]中北大学信息与通信工程学院,太原030051

出　　处：《化工新型材料》2025年第1期184-188,共5页New Chemical Materials

基　　金：山西省自然科学基金项目(201901D111138);山西省回国留学人员科研资助项目(HGKY2019069);中北大学第十九届研究生科技立项项目(自然科学项目)(20231922)。

摘　　要：以不同阴离子酸作为氧化步骤电解液,采用电化学剥离法制备氧化石墨烯。结果表明:SO_(4)^(2-)、NO_(3)^(-)和PO_(4)^(3-)这3种阴离子存在下均可制得氧化石墨烯。相同工艺条件下,当以硫酸为电解液时,SO_(4)^(2-)可通过促进生成·OH和降低石墨插层化合物表面张力生成氧化程度较高的氧化石墨烯。氧化石墨烯的氧化程度与其电容性能、循环稳定性和阻抗均呈正相关。硫酸作为电解液时制得的氧化石墨烯,在0.5A/g电流密度下比电容为30.5F/g,循环500圈后循环保持率为83%。Different anionic acids were employed as the electrolyte in the oxidation process to produce graphene oxide by electrochemical exfoliation method.The results indicated that graphene oxide could be successfully obtained in the presence of SO_(4)^(2-),NO_(3)^(-)and PO_(4)^(3-)ions.When sulfuric acid was used as the electrolyte,SO_(4)^(2-)promoted the generation of·OH radicals and reduced the surface tension of graphite intercalation compounds,resulting in the formation of graphene oxide with higher oxidation degree under identical process conditions.Furthermore,the oxidation degree of graphene oxide was positively correlated with its capacitance performance,cycle stability,and impedance.Specifically,the graphene oxide prepared with sulfuric acid as the electrolyte exhibited a specific capacitance of 30.5F/g at a current density of 0.5A/g and maintained 83%of its initial capacitance after 500 cycles.

关 键 词：阴离子 氧化石墨烯 氧化程度 电性能 

分 类 号：O613.71[理学—无机化学]