Fiber optic hydrogen sensors with sol-gel WO₃ coatings

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• 作者：Minghong Yang ; ^{Minghong.Yang@gmx.de}&#xA0 ; [Author Vitae] ; Zhi Yang&#xA0 ; [Author Vitae] ; Jixiang Dai&#xA0 ; [Author Vitae] ; Dongsheng Zhang&#xA0 ; [Author Vitae]
• 关键词：Hydrogen sensor ; Optical fiber ; Pt-loaded WO3 coating ; Sol&ndash ; gel
• 刊名：Sensors and Actuators B ; Chemical
• 出版年：2012
• 期刊代码：161_09254005
• 类别：et
• 出版时间：20 May, 2012
• 卷：166-167
• 期：Complete
• 页码：632-636
• 文件大小：879 K

摘要

Fiber-optic hydrogen gas sensor using Pt catalyzed tungsten trioxide (WO₃) was proposed and characterized in this paper. Pt-loaded WO₃ coatings prepared with sol-gel method were deposited on Bragg fibers. Shift of fiber Bragg wavelength is observed with different hydrogen concentration. Experimental results showed that highest sensitivity existed when the weight ratio of Pt was 6.5%in the Pt-loaded WO₃ coating. The response time of the hydrogen sensor was about 10 s.