废弃烟头衍生多孔碳的制备及其电容吸附去离子电极的盐水淡化性能  

Porous Carbon Derived from Wasted Cigarette Filters for Water Desalination Based on Capacitive Deionization

作　　者：徐城 李宇焓 金亦凡 闫志杰 张原源 钱敏 林功伟[1] 龚尚庆[1] XU Cheng;LI Yuhan;JIN Yifan;YAN Zhijie;ZHANG Yuanyuan;QIAN Min;LIN Gongwei;GONG Shangqing(Department of Physics,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学物理系,上海200237

出　　处：《华东理工大学学报（自然科学版）》2021年第3期361-369,共9页Journal of East China University of Science and Technology

基　　金：大学生创新创业训练计划国家级资助项目(201910251087)。

摘　　要：利用常压化学气相沉积,以KOH作为活化剂,在500~700℃制备了废弃烟头(WCFs)衍生多孔碳(MMCs)。比表面实验测试表明,废弃烟头衍生多孔碳的比表面积随着活化温度的升高而增加。当活化温度为700℃时,废弃烟头衍生多孔碳(MMC700)呈现微孔主导结构(孔径<2 nm),表面积为928 m^(2)/g。利用MMC700作为电容吸附去离子电极,在初始浓度为5 mmol/L的NaCl水溶液中,当MMC700正负电极两端电压为1.2 V时,电极表现出8.66 mg/g的离子吸附能力。MMC700较初始废弃烟头具有约4.9%(质量分数)的碳产量,X射线光电子能谱分析表明MMC700具有92.87%(摩尔分数)的高碳含量。较低活化温度(700℃)时的KOH蒸气压较低,有利于环境保护。Porous carbon derived from wasted cigarette filters(WCFs)were synthesized using an atmospheric-pressure chemical vapor deposition,using KOH as an activator at 500—700℃.Brunauer-Emmett-Teller test showed that the surface area of porous carbon derived from WCFs increased with activation temperature.Micro-and meso-porous carbon(MMC)derived from WCFs at 700℃(MMC700)exhibited a micro-pore dominant structure(pore size<2 nm),with a surface area of 928 m^(2)/g.MMC700 powder was made into electrodes for capacitive deionization and,with an initial NaCl concentration of 5 mmol/L,and the MMC700 electrode showed an ion adsorption capacity of 8.66 mg/g upon a bias of 1.2 V.MMC700 showed a carbon yield of 4.9%from its original WCFs.XPS showed that MMC700 contained a carbon content of 92.87%.700℃is a relative low activation temperature which provides a low vapor pressure of KOH,benefiting the environment.This work suggests a facile method of converting WCFs into porous carbon,and its application in water desalination based on capacitive deionization.

关 键 词：常压化学气相沉积 废弃烟头 微孔碳 电容吸附去离子 

分 类 号：X705[环境科学与工程—环境工程] TQ352.4[化学工程]