Preparation and Properties of Modified Sol-Gel Sensing Membrane for Fiber Optic Oxygen Sensor

Modified sensing membranes based on fluorescence quenching were prepared by the sol-gel method, using formamide as the doing control chemical additive, tetraethoxysilane as the main material, Ru( phen)3 Cl2 as the indicator. The membrane with the optimum thickness of 20-50μm is uniform and crack-fre...

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Bibliographic Details
Published in:Journal of Wuhan University of Technology. Materials science edition 2004-03, Vol.19 (1), p.19-22
Main Authors: Huang, Jun, Han, Yun, Zhang, Tian-Hua, Jiang, De-Sheng, Yue, Fang-Yu
Format: Article
Language:English
Subjects:
Fiber optics
Membranes
Oxygen
Oxygen probes
Sensors
Sol-gel processes
Tetraethyl orthosilicate
制备方法
溶胶-凝胶传感膜
甲酰胺
纤维光学氧气传感器
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Summary:Modified sensing membranes based on fluorescence quenching were prepared by the sol-gel method, using formamide as the doing control chemical additive, tetraethoxysilane as the main material, Ru( phen)3 Cl2 as the indicator. The membrane with the optimum thickness of 20-50μm is uniform and crack-free,in which the indicator has a very small leaking rate. The membrane is immersed in water for 50h, the membrane sensing parameter M decreases by less than 5% . The fiber optic oxygen sensor with the sensing membrane has a detection limit of 5×10^-6 M( ppm ), a response time of less than 30s, excellent reproducibility and stability.
ISSN:1000-2413
1993-0437
DOI:10.1007/bf02838354