Photosplitting water under visible light with a series of composite photocatalysts

作     者：Liejin Guo, Wei Yan, Honghui Yang, Yiliang Liu, Hongtan Liu, Liang Zhao State Key Laboratory of Multiphase Flow in Power Engineering (SKLMF), Xi’an Jiaotong University, Xi’an, 710049, P. R. ChinaQuesting honor Professor in SKLMF of Xi’an Jiaotong University Director of Dorgan Solar Energy and Fuel Cell Laboratory, University of Miami, Florida, USA. 

会议名称：《2004年国际氢能大会》

会议日期：2004年

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

关 键 词：composite photocatalyst TiO2 hydrogen production visible light 

摘      要：正We synthesized a series of composite photocatalyst M-TiO2-xNx-WO3 （M=Pt, Pd） by the method of template. The band-gap energies for Pd-TiO2-xNx-WO3 （2.07 eV） and ***-WO3 （1.65 eV） are lower than rutile （3.00 eV） and the best reported photocatalyst, the chemically modified n-TiO2 （2.32 eV）. The maximum absorption edge was red-shifted to 600nm for Pd-TiO2-xNx-WO3, and 750nm for Pt-TiO2-xNx-WO3, so they can absorb most of the visible as well as the U V part of the solar spectrum. These photocatalysts have good thermal stability since the noble metals （Pt or Pd） are located inside the compound particles. Under the irradiation to ultraviolet and visible light, the catalysts showed good performance of photosplitting water to hydrogen with Na2S/Na2SO3 solution as sacrificial agents.