会议专题

Modified colloidal silicalite-1 crystals and their use for preparation of Langmuir-Blodgett films

Purified colloidal Silicalite-1 crystals with a size of 100 nm were modified by centrifugation and re-dispersion in methanol, ethanol, 2-propanol or 1-butanol followed by sonication for two hours. After centrifugation and re-dispersion in fresh solvents, the alcohol suspensions of modified hydrophobic Silicalite-1 were spread at the air-water interface in a Langmuir- Blodgett trough and pressure-area isotherms were recorded. The floating monolayers were successfully transferred to Si wafers. The interaction between Silicalite-1 and methanol was studied in detail by collecting ATR-IR spectra of a Silicalite-1 suspension in methanol upon in situ methanol evaporation and during exposure to air. The increased hydrophobicity of the methanol modified Silicalite-1 was attributed to esterification of the surface of the zeolite nanocrystals. The modification procedure was also applied to micron-sized Silicalite-1 and corresponding Langmuir-Blodgett films were prepared.

L. Tosheva L. H. Wee Z. Wang B. Mihailova C. Vasilev A. M. Doyle

Advanced Materials Group, Division of Chemistry and Materials, Manchester Metropolitan University, C Universitat Hamburg, Grindelallee 48, Mineralogisch-Petrographisches Institut, D-20146 Hamburg, Germ Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, United Kingdom Advanced Materials Group, Division of Chemistry and Materials, Manchester Metropolitan University, C

国际会议

第15届国际分子筛大会

北京

英文

2007-08-12(万方平台首次上网日期,不代表论文的发表时间)