光子学报, 2012, 41 (9): 1036, 网络出版: 2012-08-31
溶胶凝胶法制备Pt/WO3氢气敏感材料的研究
Characteristics of Pt/WO3 Hydrogen Sensitive Material Prepared by Solgel Method
摘要
采用溶胶凝胶法制备纳米级WO3, 掺杂不同含量的氯铂酸并混合搅拌均匀, 再进行热处理, 将所得粉体均匀涂覆在光纤光栅周围, 制备出具有氢敏特性的光纤光栅传感器.实验中, 通过改变氯铂酸掺杂量和热处理温度并进行XRD物相分析得:随着Pt∶W的降低以及热处理温度的升高, WO3的结晶度不断提高;通入不同浓度的氢气对传感器进行氢敏性能测试发现, 经过300℃热处理, Pt∶W为1∶9时, 对4%浓度的氢气能达到15 s的响应速度, 最高有140 pm的中心波长变化, 多次重复通氢气, 重复性良好;当热处理温度达到500℃时, 材料对氢气已经不敏感.
Abstract
Nanostructured WO3 mixed with chloroplatinic acid was prepared by solgel method. Fiber Bragg grating was coated with the hybrid material. The asprepared powder was mixed with different ratio of chloroplatinic acid and annealed at different temperatures and their structures were characterized by Xray diffraction. The results show that the crystallinity of WO3 increases with the decrease of chloroplatinic acid and the increase of thermal treating temperature. The experiment demonstrates that after being annealed under 30℃ with the Pt∶W ratio of 1∶9, the sensor has good repeatability, can reach the response speed of 15 s to 4% Hz, and has 140 pm central wavelength change. The sensor shows no sensibility with further increase of temperature up to 500℃.
杨志, 杨明红, 代吉祥, 曹坤, 廖汉生, 张鹏程. 溶胶凝胶法制备Pt/WO3氢气敏感材料的研究[J]. 光子学报, 2012, 41(9): 1036. YANG Zhi, YANG Minghong, DAI Jixiang, CAO Kun, LIAO Hansheng, ZHANG Pengcheng. Characteristics of Pt/WO3 Hydrogen Sensitive Material Prepared by Solgel Method[J]. ACTA PHOTONICA SINICA, 2012, 41(9): 1036.