影像科学与光化学 ›› 2006, Vol. 24 ›› Issue (5): 366-376.DOI: 10.7517/j.issn.1674-0475.2006.05.366

• 研究简报 • 上一篇    下一篇

铜锡改性纳米二氧化钛光催化氧化还原性能的研究

吴树新1,2,3, 尹燕华1, 马智2, 秦永宁2   

  1. 1. 中船重工集团公司, 第七一八研究所, 河北, 邯郸, 056027;
    2. 天津大学, 化工学院, 天津, 300072;
    3. 唐山师范学院, 新型催化技术研究所, 河北, 唐山, 063000
  • 收稿日期:2006-02-23 修回日期:2006-04-07 出版日期:2006-09-23 发布日期:2006-09-23
  • 通讯作者: 尹燕华,E-mail:hdwushx@yahoo.com.cn.

Photocatalytic Redox Performance of Copper Modified TiO2 Coupling with SnO2

WU Shu-xin1,2,3, YIN Yan-hua1, MA Zhi2, QIN Yong-ning2   

  1. 1. The 718th Research Institute of the 7th Academy of China Shipbuilding Industrial Corporation, Handan 056027, Hebei, P. R. China;
    2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China;
    3. Institute of Advanced Catalysis and Technology, Tangshan Teacher’s College, Tangshan 063000, Hebei, P. R. China
  • Received:2006-02-23 Revised:2006-04-07 Online:2006-09-23 Published:2006-09-23

摘要: 在复合半导体基础上,采用超声浸渍法对催化剂表面作进一步铜改性,制备了铜锡改性的纳米二氧化钛光催化剂CuOx-SnO2/TiO2,考察了表面铜改性、二氧化锡复合对催化剂光催化氧化还原性能的影响.结果表明,表面铜改性和复合都有利于提高催化剂光催化氧化还原能力,二者间表现出相互增强的作用.结合XRD、XPS、TEM等催化剂表征结果,对铜锡改性纳米二氧化钛光激发机制进行了讨论,提出了二氧化碳光催化还原的可能机制.

关键词: 复合半导体, 光催化氧化还原, 铜表面改性, 甲醛, 乙酸, 二氧化碳

Abstract: TiO2 coupling with SnO2 was modified by impregnation method with aqueous solution of Cu(NO3)2 under ultrasonic irradiation,followed by calcinations at 450 ℃.The photocatalytic activity of the catalysts was evaluated using the reaction of photocatalytic oxidation of acetic acid as well as formaldehyde,and photocatalytic reduction of CO2.The results show that the photocatalytic activity of TiO2 can be improved either by copper modified or coupling with SnO2.One of the two improvement methods is enhanced by the other.The catalysts were characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM).The mechanism for the improvement of CuOx-SnO2/TiO2 state was discussed and the possible route of photocatalytic reduction of CO2 was proposed.

Key words: coupled semiconductor, photocatalytic redox, acetic acid, copper modified, formaldehyde, carbon dioxide

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