织构可控多孔炭纳米纤维的制备及其室温脱除低浓度氮氧化物（英文）  

Preparation of porous carbon nanofibers with controllable pore structures for low-concentration NO removal at room temperature

作　　者：王明玺[1,2] 郭泽宇[2,3] 黄正宏[2] 康飞宇[2] 

机构地区：[1]武汉工程大学化学与环境工程学院,绿色化工过程教育部重点实验室,湖北武汉430074 [2]清华大学材料学院,北京100084 [3]内蒙古农业大学材料科学与艺术设计学院,内蒙古呼和浩特010010

出　　处：《新型炭材料》2016年第3期277-286,共10页New Carbon Materials

基　　金：Cooperative Project JST-M OST(2011DFA50430,2008DFA51410)~~

摘　　要：采用静电纺丝法制备聚丙烯腈纤维,经预氧化、炭化和活化,得到具有孔径发达和比表面积大的多孔炭纳米纤维。控制纺丝液的浓度和活化条件,可制得织构可控的多孔炭纳米纤维。将所制备的纤维用于室温低浓度NO(20 ppm)的脱除,脱除效果主要基于吸附和催化氧化作用。纤维的织构影响其脱除NO的性能,直径越小、微孔越丰富、比表面积越大,对NO的吸附与催化氧化效果越好。当NO进口浓度为20 ppm时,在900℃下活化的平均直径为175 nm的多孔炭纳米纤维脱除NO率可高达29.7%。Porous carbon nanofibers （PCNFs） with controllable pore structures for removing low-concentrations of NO at roomtemperature were prepared from electrospun polyacrylonitrile nanofibersby oxidative stabilization,carbonization and steam activa-tion. The PCNFs had high surface areas and abundant micropores, which were favorable for the adsorption and catalytic oxidation of NO at ambient temperature. The diameter of the fibers and their pore structure were tailored by adjusting the concentrations of poly- acrylonitrile, and the spinning and activation parameters. Their performance in the removal of low-concentration NO was strongly dependent on their pore structure and fiber diameter. The highest NO removal ratio for PCNFs activated at 900 益 , which had an av-erage diameter of 175 nm,reached 29. 7% when the inlet NO concentration was 20 ppm.

关 键 词：多孔炭纳米纤维 NO脱除 织构可控 催化氧化 

分 类 号：TQ342.742[化学工程—化纤工业]