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
曾艳萍 1杨菊芳 1揭楚玉 1周志明 2李旭 1张春浩 1黄齐林3
作者信息
- 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
- 折叠
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5A/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.
Abstract
Tamarind shell-based activated carbon was prepared by KOH activation(HHC)and char-acterized 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,en-dothermic,and the increase of confusion is conducive to the adsorption.The quasi-second-order adsorp-tion 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 su-percapacitor 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Key words
biomass waste/methylene blue/adsorption mechanism/supercapacitor/electrochemical performance引用本文复制引用
基金项目
云南省地方本科高等学校基础研究联合专项(2017FH001-022)
云南省地方本科高等学校基础研究联合专项(2018FH001-117)
云南省教育厅科研项目(2019J0737)
云南省教育厅科研项目(2023J0996)
公安部重点实验室开放基金(2019DPKF02)
大学生创新创业训练计划(202011390004)
大学生创新创业训练计划(202111390037)
大学生创新创业训练计划(202011390032)
大学生创新创业训练计划(202011390033)
大学生创新创业训练计划(2020B67)
大学生创新创业训练计划(2021A022)
出版年
2024
NETL
NSTL
维普
万方数据