title: Comparative Study of Two Different TiO₂ Film Sensors on Response to H₂ under UV Light and Room Temperature.
abstract: An anatase TiO₂ film sensor was prepared by a facile in-situ method on the interdigitated Au electrode deposited on the alumina substrate. The structure, morphology and the optical properties of the in-situ TiO₂ film sensor were characterized by X-ray diffraction, Scanning Electron Microscopy, and UV-vis diffuse reflectance spectra. The photo-assisted gas sensitivities of the prepared film towards H₂ gas were evaluated at room temperature in N₂ and synthetic air atmospheres. As compared to TiO₂ film sensor prepared by drop-coating method, this in-situ TiO₂ film sensor exhibited a more compact structure composed of uniform TiO₂ microspheres as well as a better gas sensitivity towards H₂ under UV irradiation, especially in synthetic air. The photo-electrochemical measurements suggest that these improvements may be associated with the efficient charge transfer in the TiO₂ interface induced by the TiO₂ microsphere structure. This study might offer a feasible approach to develop photo-assisted gas sensors at ambient temperature.
authors: State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China. n130420102@fzu.edu.cn.|College of Chemistry, Fuzhou University, Fuzhou 350108, China. n130420102@fzu.edu.cn.
authors: Xiaoying
authors: X
authors: Peng
authors: State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China. n141320126@fzu.edu.cn.|College of Chemistry, Fuzhou University, Fuzhou 350108, China. n141320126@fzu.edu.cn.
authors: Zhongming
authors: Z
authors: Wang
authors: College of Chemistry, Fuzhou University, Fuzhou 350108, China. n130420085@fzu.edu.cn.
authors: Pan
authors: P
authors: Huang
authors: State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China. chenxun@fzu.edu.cn.|College of Chemistry, Fuzhou University, Fuzhou 350108, China. chenxun@fzu.edu.cn.
authors: Xun
authors: X
authors: Chen
authors: State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China. xzfu@fzu.edu.cn.|College of Chemistry, Fuzhou University, Fuzhou 350108, China. xzfu@fzu.edu.cn.
authors: Xianzhi
authors: X
authors: Fu
authors: State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China. daiwenxin@fzu.edu.cn.|College of Chemistry, Fuzhou University, Fuzhou 350108, China. daiwenxin@fzu.edu.cn.
authors: Wenxin
authors: W
authors: Dai
keywords: electron transfer; in-situ fabrication; photo-electrochemical measurement; photo-response; semiconductor gas sensor