KOH改性活性炭涂层电极的电容去离子性能研究  

Research on the capacitive deionization performance of activated carbon-coated electrodes modified with KOH

作　　者：蒋绍阶[1] 马丹丹[1] 盛贵尚[1] 蒋世龙[1] 陈莽[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《工业水处理》2015年第9期53-56,共4页Industrial Water Treatment

基　　金：村镇饮用水安全保障重大科技工程(2012BAJ25B06-001);水体污染控制与治理科技重大专项(2009ZX07424-004)

摘　　要：用KOH对市售的粉末活性炭进行表面改性。采用BET分析改性前后活性炭的表面结构,并采用活性炭涂层电极构建电容去离子吸附装置,研究改性后电极的去离子效果。研究表明:经过KOH改性后,活性炭的比表面积从519.25 m2/g增加到975.07 m2/g,提高了87.78%,中孔孔容占总孔孔容的百分比提高了48.28%,改性后活性炭的孔隙结构和孔径的分布更有利于溶液中的Na+和Cl-通过,提高了电极的吸附速率。The surface modification has been made to the commercial activated carbon powder with KOH. The sur- face structure of activated carbon, before and after the modification are analyzed with BET. The capacitive deioniza- tion adsorption device is established with activated carbon-coated electrodes. The deionization effect of the modified electrode is researched. The research shows that after being modified with KOH, the specific surface area of activa- ted carbons is increased from 519.25 m^2/g to 975.07 m^2/g;it means that its increase in percentage is 87.78%. The percentage of medium-size pore volume is 48.28% higher than the total pore volume. The pore structure and pore-size distribution are more advantageous for Na＋ and Cl- to get through, raising the electrode adsorption rate.

关 键 词：活性炭 表面改性 电容去离子 

分 类 号：X703.1[环境科学与工程—环境工程]