Preparation of Zeolites Supported on Optical Microfibers

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• 作者：Ajit R. Pradhan ; Megan A. Macnaughtan ; and Daniel Raftery
• 刊名：Chemistry of Materials
• 出版年：2002
• 出版时间：July 2002
• 年：2002
• 卷：14
• 期：7
• 页码：3022 - 3027
• 全文大小：473K
• 年卷期：v.14,no.7(July 2002)
• ISSN：1520-5002

文摘

Samples of zeolites supported on optical microfibers were prepared with tetraethylorthosilicate (TEOS) as a binding agent using sol-gel methods. A slower rate of TEOShydrolysis in the sol-gel relative to the rate of silanol condensation was observed to becrucial for successful support of the zeolite particles on the optical fibers. The amount ofwater and the pH of the reaction gel were varied to control and optimize the rates ofhydrolysis and condensation. Scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area measurements, and thermogravimetric analysis (TGA) were usedto characterize the zeolite particles on the optical microfibers. The zeolite adhesion obtainedwas robust as the particles sustained spinning at 2000 Hz and suspension in flowing waterfor 12 h. The zeolite-supported optical fibers provide an improved catalyst system for theintroduction of light into zeolite pores.