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SYNTHESIS AND CHARACTERIZATION OF MFI MOLECULAR SIEVES MEMBRANES ON OPTICAL FIBER MICRO-RESONATORS SURFACE

Authors： Zheng Guolong, Cheng Hao, Zhou Lanying

Units： School of Mechanical, Beijing Institute Of Technology

KeyWords： template; zeolite molecular sieves; micro-resonator; sensors

ClassificationCode：O611.6

year,volume(issue):pagination： 2012,32(2):59-64

Abstract：

Preparation of MFI zeolite molecular sieve membranes on optical fiber micro-resonators by using TPAOH and NBA as templates was investigated by in situ hydrothermal crystallization. Crystal structure and surface morphology of the obtained membranes were characterized by XRD and SEM. It is showed that we can get good zeolite membranes by using TPAOH and NBA as templates. Crystals with the size of about 2 μm were synthesized by using TPAOH as template have regular coffin shape, while crystals with the size of about 500 nm were synthesized by using NBA as template have no regular shape. Furthermore, the MFI zeolite-LPFG sensor was tested for detection of 5% volume fraction acetone gas. The resonant wavelength of LPFG shifted about 2nm toward smaller wavelength. Upon loading analyte molecules, the refractive index of the MFI zeolite changes in the close of the fiber index where the micro-resonator has a large response to achieve high sensitivity.

Funds：

国家863计划（2008AA03Z301）;

AuthorIntro：

郑国龙（1984-），男，山东，硕士研究生，主要从事沸石镀膜研究，（Tel.15210501075 Email:zhengguolong10@163.com）

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