化工进展 ›› 2022, Vol. 41 ›› Issue (5): 2537-2545.DOI: 10.16085/j.issn.1000-6613.2021-1280

• 材料科学与技术 • 上一篇    下一篇

吸附电活性染料的活性炭电极电化学性能

陈泳1,2(), 马妍楠1,2, 徐成1,2   

  1. 1.甘肃省低碳能源化工重点实验室,甘肃 兰州 730050
    2.兰州理工大学石油化工学院,甘肃 兰州 730050
  • 收稿日期:2021-06-18 修回日期:2021-10-22 出版日期:2022-05-05 发布日期:2022-05-24
  • 通讯作者: 陈泳
  • 作者简介:陈泳(1977—),女,博士,教授,硕士生导师,研究方向为绿色储能材料和污废水处理技术。E-mail: yongchen2003@126.com
  • 基金资助:
    国家自然科学基金(52163025);甘肃省自然科学基金(21JR7RA229)

Electrochemical performance of activated carbon electrode adsorbing electroactive dyes

CHEN Yong1,2(), MA Yannan1,2, XU Cheng1,2   

  1. 1.Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou 730050, Gansu, China
    2.School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, Gansu, China
  • Received:2021-06-18 Revised:2021-10-22 Online:2022-05-05 Published:2022-05-24
  • Contact: CHEN Yong

摘要:

采用商用活性炭(AC)吸附二元混合染料亚甲基蓝(MB)和胭脂红(AR18),制备得到AC/(MB+AR18)电极材料。比较单一活性炭(AC)和吸附不同浓度的二元混合染料后的活性炭[AC/(MB+AR18)]的电化学性能。三电极体系的测试结果表明:在1mol/L H2SO4电解液中,当电流密度为1A/g时,吸附了浓度为400mg/L污染物的AC/(MB+AR18)比电容为182F/g,高于单一AC的比电容(109F/g)。随后选用性能最优的AC/(MB+AR18)-400作为电极材料,组装对称超级电容器器件,发现工作电压窗口从只用AC组装的对称超级电容器的1.1V提高到1.5V,电流密度为0.75A/g时,功率密度为843.84W/kg,能量密度可达32.23W·h/kg,远远高于AC组装的超级电容器(4.74W·h/kg),说明MB和AR18不仅为AC提供额外的法拉第电容,同时有助于提高其工作电压窗口。

关键词: 活性炭, 吸附(作用), 亚甲基蓝, 胭脂红, 电化学

Abstract:

Commercial activated carbon (AC) was used to adsorb binary mixed dyes of methylene blue (MB) and Carmine (AR18) to prepare AC/(MB+AR18) electrode materials. The electrochemical performance of activated carbon (AC) and that adsorbed different concentration binary mixed dyes [AC/(MB+AR18)] was compared. The test results of the three-electrode system showed that, in 1mol/L H2SO4 electrolyte and under the current density of 1A/g, the specific capacitance of AC/(MB+AR18) after adsorbing in a concentration of 400mg/L pollutants was 182F/g, higher than that of the single AC (109F/g). Subsequently, AC/(MB+AR18)-400 with the best performance was selected as the electrode material to assemble a symmetrical supercapacitor device. It is found that the operating voltage window of AC/(MB+AR18) was increased to 1.5V, compared to 1.1V for the symmetrical supercapacitors assembled with AC only. When the current density was 0.75A/g, the power density was 843.84W/kg, and the energy density reached 32.23W·h/kg, higher than that of the supercapacitor assembled by activated carbon (4.74W·h/kg), which suggested that MB and AR18 not only provided additional Faraday capacitance for AC, but also helped to increase its operating voltage window.

Key words: activated carbon, adsorption, methylene blue, carmine, electrochemistry

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn