摘要
采用晶种浸渍和二次水热法制备了Silicalite-1/ACF复合催化材料,采用扫描电子显微镜(SEM)、X射线衍射(XRD)和N2吸附和脱附等手段进行样品表征。结果表明,炭纤维表面清晰可见Silicalite-1包覆层,Silicalite-1/ACF复合材料的BET比表面积为826 m^2·g^(-1),孔体积为0.42 cm^3·g-1,平均孔径约为0.64 nm。在室温下研究了Silicalite-1/ACF复合催化材料对NO催化氧化NO_2的催化活性,相对湿度高于25%时,NO催化转化率超过38%,Silicalite-1/ACF复合催化材料具有良好的抗水汽性能和催化活性,主要是由于包覆的Silicalite-1具有良好的疏水性能。
A silicalite/activated carbon fiber （ACF） composite was prepared by a two-step method, in which nitric acid oxidationwas used to incorporate hydrophilic groups to improve crystal seed impregnation and a hydrothermal process was used to grow sili- calite on the ACFs. The samples were characterized by SEM, XRD and N2 adsorption. Results showed that the surface o f the ACFs was covered with a silicalite layer, and the specific surface area, pore volume and average pore size of the composite were 826 m^2·g^-1, 0.42 cm^3·g^-1 and 0.64 nm, respectively. The catalytic activity of the ACFs for NO oxidation to NO 2 was h ig h e r than that of a composite loaded with 10 wt% silicalite under dry conditions. However,the latter had a much better resistance to vapor and exhibited a more stable catalytic activity than the ACFs under moist conditions.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2017年第1期35-40,共6页
New Carbon Materials
基金
Major Program of Science and Technology of Shanxi Province(20111101013)~~
