氯化锌处理活性炭电极及电容去离子研究  

ACTIVATED CARBON TREATED BY ZnCl_2 FOR CAPACITIVE DEIONIZATION

作　　者：程健[1] 王世平[1] 蔡文姝[1] 熊祝标 刘建允[1] 

机构地区：[1]东华大学环境科学与工程学院,国家环境保护纺织污染防治工程技术中心,上海201620

出　　处：《水处理技术》2015年第11期34-38,共5页Technology of Water Treatment

基　　金：国家自然科学基金(21105009);中央高校基本科研业务费专项资金(13D111305)

摘　　要：进一步提高活性炭的电化学电容,采用氯化锌为活化剂对活性炭进行活化处理以提高比表面积,改善孔径分布。N2吸脱附测试表明,氯化锌活化后活性炭的比表面积及孔容均有提高,傅里叶变换红外-拉曼光谱(FTIR-Raman)分析了活化后活性炭表面结构成分的变化。以氯化锌活化活性炭制备电极用于电容器去离子,其脱盐容量比活化前有明显改善。研究了活化温度对比表面积及电化学性能的影响,结果发现,随着活化温度升高,比表面积逐渐降低,但电极比电容及对应的电容脱盐量增加。800℃时活化电极的电容脱盐量比未活化碳电极提高1.3倍,达到10.5 mg/g。活化电极的循环稳定性好,步骤简单,易于批量生产。Activated carbon（AC） was treated by Zn Cl2 to increase the specific surface area and improve suitable pore size distribution for further improving the electrochemical capacitance property. Brunauer-Emmett-Teller（BET） results indicated that both the specific surface area and pore size distribution of AC after Zn Cl2 activation treatment improved. Fourier Transform Infrared-Raman Spectroscopy（FTIR-Raman） was used to analyze the composition and structure of AC after Zn Cl2 treatment. Electrochemical measurements on the AC electrode based capacitor demonstrated that the salt removal capacity of AC electrode enhanced obviously. Activation treatment temperature was studied on the effect of specific surface area and electrochemical performance.The results showed that the specific surface area generally decreased with the increasing of activation temperature, while electrode specific capacitance and the responding capacitance salt removal increased. When AC activated electrode was treated at 800 ℃, its capacitance salt removal increased 1.3 times than that of unactivated carbon electrode and its salt removal reached 10.5 mg/g. Cycle stability of activated electrode is good with simple treatment measurement and easy for batch production.

关 键 词：活性炭 氯化锌 电容去离子 

分 类 号：TQ028.74[化学工程]