高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (4): 733.

• 研究论文 • 上一篇    下一篇

贵金属负载光催化剂在丙炔光催化水解反应中的研究(Ⅲ)

张金龙1, 安保正一2   

  1. 1. 华东理工大学精细化工研究所, 上海 200237;
    2. 大阪府立大学工学部应用化学系, 日本大阪 59928531
  • 收稿日期:2003-01-21 出版日期:2004-04-24 发布日期:2004-04-24
  • 通讯作者: 张金龙(1964年出生),男,博士,教授,博士生导师,从事光催化和光化学研究.E-mail:jlzhang@ecust.edu.cn E-mail:jlzhang@ecust.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20073026);教育部科技重点项目;上海市教委曙光计划资助;上海市纳米发展与促进中心纳米专项资助

A Study of Loaded Photocatalysts with Precious Metal on the Photocatalytic Hydrolysis Reaction of Propyne(Ⅲ)

ZHANG Jin-Long1, Masakazu Anpo2   

  1. 1. Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China;
    2. Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japan
  • Received:2003-01-21 Online:2004-04-24 Published:2004-04-24

摘要: 利用三种不同负载方法制备了含有不同贵金属的TiO2光催化剂,通过测试其XPS和光催化活性和选择性发现,TiO2光催化剂在丙炔和水的光催化水解反应中,由于贵金属的存在,有利于促进发生加氢反应,导致丙烯的生成量增加.Pt,Ru,Rh,Pd和Ag负载在TiO2上,在紫外线照射下(λ>270nm),Pd负载的TiO2光催化剂表现出最高的光催化活性.光催化活性和负载贵金属所处的氧化状态有密切的关系,贵金属完全被还原到0价是提高光催化活性的必要条件.

关键词: 贵金属, 二氧化钛, 光催化剂, 乙炔

Abstract: Three different loaded methods were used to prepare photocatalysts with different precious metals. Their photocatalytic reactivities and selectivities were measured by XPS spectra. It was found from the experimental results that the precious metals existing on TiO2 photocatalysts could promote of hydrogenation reaction in photocatalytic hydrolysis of propyne, and made the yield of propene product increasing. Among the titanium oxides loaded with Pt, Ru, Rh, Pd and Ag, the photocatalyst loaded with Pd had the highest photocatalytic reactivities under UV light(λ>270 nm) irradiation. The photocatalytic reactivities are closely related to the oxidation state of precious metals and it is necessary to make the valence of precious metals be reduced to 0 valence for increasing photcatalytic reactivities.

Key words: Precious metal, Titanium oxide, Photocatalyst, Propyne

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