The characterization of supported mesoporous thin films -supercritical fluid extraction of surfactant templates

摘要：

Supercritical CO2 extraction (SFE) after modified with MeOH cosolvent was demonstrated to be efficient in removing templates from mesopores and micropores of surfactant-silica composite films, which were generated by Brij56 and P123 surfactant templating syntheses and characterized by FTIR, XRR (X-ray specular reflectivity) and Kr adsorption. Comparing with P123 film, the template-free Brij56 film of pore size =1.89 ~ 2.12 nm exhibits higher wall and film densities, and more ordered mesochannel packing. It is suggested that the presence of mesopores of average size = 4.24 ~ 4.63 nm as well as of micropores inside the silica wall is on P123 film.

作者: Kun-Chang Hsu Yen-Po Chang Kuei-Jung Chao

作者单位: Department of Chemistry, National Tsinghua University, Hsinchu

会议类型: 国际会议

会议名称: 第15届国际分子筛大会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-12（万方平台首次上网日期，不代表论文的发表时间）