酸角壳基活性炭的制备及其吸附与电化学性能研究  

Research on preparation of tamarind shell-based activated carbon and its adsorption and electrochemical performance

作　　者：曾艳萍 杨菊芳 揭楚玉 周志明 李旭 张春浩 黄齐林 ZENG Yanping;YANG Jufang;JIE Chuyu;ZHOU Zhiming;LI Xu;ZHANG Chunhao;HUANG Qilin(School of Chemical Biology and Environment,Yuxi Normal University,Yuxi,Yunnan 653100,China;Yunnan Dianqing Environmental Technology Co.,Ltd.Yuxi,Yunnan 653100,China;Yunnan Provincial Key Laboratory of Forensic Science,Yunnan Police College,Kunming,Yunnan 650223,China)

机构地区：[1]玉溪师范学院化学生物与环境学院,云南玉溪653100 [2]云南滇清环境科技有限公司,云南玉溪653100 [3]云南警官学院云南省刑事科学技术重点实验室,云南昆明650223

出　　处：《贵州师范大学学报（自然科学版）》2024年第1期119-126,共8页Journal of Guizhou Normal University：Natural Sciences

基　　金：云南省地方本科高校基础研究联合专项项目(2017FH001-022,2018FH001-117);云南省教育厅科学研究基金项目(2019J0737,2023J0996);公安部重点实验室开放课题(2019DPKF02);大学生创新创业训练计划项目(202011390004、202111390037、202011390032、202011390033、2020B67、2021A022)。

摘　　要：以生物质废弃物酸角壳为原料,通过KOH活化制备酸角壳基活性炭(HHC),采用傅里叶变换红外光谱、扫描电子显微镜表征。酸角壳基活性炭吸附亚甲基蓝(MB)的研究表明:吸附是自发进行,吸热,增加混乱度有利于吸附进行;准二级吸附动力学方程及Langmuir等温吸附模型能较好拟合吸附过程。以3 mol/L KOH为电解液,在三电极体系下测定HHC制备的超级电容器电极的循环伏安、恒流充放电、循环性能和交流阻抗。结果显示,电流密度为5 A/g时,首次放电比电容为100 F/g,循环20次后容量保持率为100%,具有较好的循环性能,适合用作超级电容器电极材料。Tamarind shell-based activated carbon was prepared by KOH activation(HHC)and characterized by Fourier transform infrared spectroscopy and scanning electron microscope.The simulated adsorption of methylene blue(MB)wastewater by HHC shows that the adsorption is spontaneous,endothermic,and the increase of confusion is conducive to the adsorption.The quasi-second-order adsorption kinetics equation and Langmuir isothermal adsorption model can fit the adsorption process well.The cyclic voltammetry,constant current charge-discharge,cyclic performance and AC impedance of supercapacitor electrodes prepared by HHC were measured in a three-electrode system with 3 mol/L KOH as electrolyte.The results show that when the current density is 5 A/g,the specific capacitance of initial discharge is 100 F/g,and the capacity retention rate is 100%after 20 cycles,which has good cycle performance and is suitable for using as electrode material for supercapacitors.

关 键 词：生物质废弃物 亚甲基蓝 吸附机理 超级电容器 电化学性能 

分 类 号：X712[环境科学与工程—环境工程]