Abstract ： TiO₂ -CuO composite particles were synthesized using solvothermal method. The structure and morphologies of the composite particles were characterized and their photocatalytic property for methanol productions from the photoreduction of CO₂ under simulated sun-light were tested and the mechanism was discussed. The experimental results suggested that TiO₂-CuO composite particles were hollow particles with a mean diameter of about 4.5 μm. Copper sulfate acts both as the templates and the metal source during the synthetic process. The photocatalytic results indicates that TiO₂-CuO composite particles with mass fraction of 8% of CuO own the best photocatalytic activity. The methanol production reached 127.8 μmol/g with isopropanol as the hole scavenger. The modification of CuO and the adding of isopropanol are found to promote the separation of holes and electrons and the efficiencies for photoreduction of CO₂ are improved.

Keywords: composite particles; solvothermal method; photocatalysis

中图分类号：TQ203          文献标志码：A

文章编号：1008-5548（2014）05-0048-05

DOI:10.13732/j.issn.1008-5548.2014.05.012

收稿日期：2014-04-19， 修回日期：2014-05-05，在线出版时间：2014-10-11。

基金项目：国家自然科学基金项目，编号：21076021，21376025。

第一作者简介：王倩（1986—），女，博士研究生，从事 TiO2 及其复合材料的制备及光催化应用方面的研究。 E-mail:wangqian_854@126.com。

通信作者简介：毋伟（1966—），男，博士，教授，主要从事纳米粉体的制备、改性及应用研究。 E-mail:wuwei@mail.buct.edu.cn。