吸附电活性染料的活性炭电极电化学性能  

Electrochemical performance of activated carbon electrode adsorbing electroactive dyes

作　　者：陈泳 马妍楠[1,2] 徐成 CHEN Yong;MA Yannan;XU Cheng(Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province,Lanzhou 730050,Gansu,China;School of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050,Gansu,China)

机构地区：[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

出　　处：《化工进展》2022年第5期2537-2545,共9页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(52163025,51763015,51503092);甘肃省自然科学基金(21JR7RA229)。

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 H_(2)SO_(4)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(10^(9)F/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。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 H_(2)SO_(4)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(10^(9)F/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.

关 键 词：活性炭 吸附(作用) 亚甲基蓝 胭脂红 电化学 

分 类 号：TQ15[化学工程—电化学工业]