Comparative investigation on photocatalytic hydrogen evolution over Cu-, Pd-, and Au-loaded mesoporous TiO2 photocatalysts
Comparative investigation on photocatalytic hydrogen evolution over Cu-, Pd-, and Au-loaded mesoporous TiO2 photocatalysts
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DOI：
10.1016/j.catcom.2005.06.004
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发表时间：
2005-10
影响因子：
3.7
通讯作者：
T. Sreethawong;S. Yoshikawa
中科院分区：
文献类型：
--
作者：
T. Sreethawong;S. Yoshikawa
以甲醇为空穴捕获剂，采用表面活性剂为模板剂，采用一步溶胶-凝胶（SSSG）法制备了不同Cu、Pd和Au助催化剂负载量的介孔TiO 2光催化剂，并对催化剂的光催化活性进行了比较研究。采用X射线衍射（XRD）、N2吸附-脱附、BET比表面积、BJH孔径分布、扫描电镜（SEM）和能谱仪（EDS）对催化剂进行了表征。重点研究了介孔TiO 2上助催化剂最佳负载量的比较。在光催化剂中，介孔TiO 2负载2 wt% Au的光催化析氢活性最高。
Photocatalytic activity for hydrogen evolution from water using methanol as hole scavenger was comparatively investigated over mesoporous TiO2photocatalysts with various contents of Cu, Pd, and Au cocatalyst loadings prepared by single-step sol–gel (SSSG) process with surfactant template. The photocatalysts were analytically characterized by X-ray diffraction (XRD), N2adsorption–desorption, Brunauer–Emmett–Teller (BET) surface area, Barrett–Joyner–Halenda (BJH) pore size distribution, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) analyses. The comparison of optimum loading contents of the cocatalysts was chiefly studied on the mesoporous TiO2. Among photocatalysts, 2 wt% Au supported on mesoporous TiO2exhibited the highest photocatalytic H2evolution activity.