摘要：采用溶剂热法制备TiO₂-CuO复合颗粒,表征了复合颗粒的形貌、结构并研究其模拟太阳光下光催化还原CO₂生成甲醇的性能,探讨了TiO₂-CuO光催化还原CO₂的机理。结果表明:TiO₂-CuO复合颗粒为平均粒径约为4.5μm的空心球形颗粒,硫酸铜在复合颗粒的制备过程中具有模板剂和金属源的作用。CuO质量分数为8%的TiO₂-CuO复合颗粒具有较高的光催化还原效率,在异丙醇作用下,甲醇产量达127.8μmol/g;CuO复合及异丙醇的添加能够促进电子和空穴的分离,提高光催化还原CO₂效率。

关键词：复合颗粒；溶剂热法；光催化

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