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.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2016年第3期277-286,共10页
New Carbon Materials
基金
Cooperative Project JST-M OST(2011DFA50430,2008DFA51410)~~
关键词
多孔炭纳米纤维
NO脱除
织构可控
催化氧化
Porous carbon nanofibers （PCNFs）
NO removal
Controllable texture
Catalytic oxidation
