학술논문
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
Document Type
Academic Journal
Author
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
Source
贵州师范大学学报（自然科学版） / Journal of Guizhou Normal University(Natural Sciences). 42(1):119-126
Subject
Language
Chinese
ISSN
1004-5570
Abstract
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.
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.
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.