铜掺杂TiO_2的制备、表征及光催化产氢性能

Preparation,Characterization and Photocatalytic H_2 Production Activity of Copper Doped TiO_2

研究制备了高活性的铜掺杂二氧化钛光催化剂,并采用X射线衍射(XRD)和紫外-可见漫反射光谱(UV-Vis DRS)对其进行了表征。以葡萄糖为电子供体,系统地研究了铜掺杂量、煅烧温度、葡萄糖初始浓度对二氧化钛光催化产氢性能的影响。结果表明:少量铜离子掺杂对二氧化钛的晶相无影响,但能显著地改善其光吸收性能。最佳的铜掺杂量为3%,该催化剂4 h的产氢量达25 mL,是纯二氧化钛产氢量的近2倍。

Degradation of organic substance and simultaneous recovery of hydrogen gas as renewable energy can proceed via photocatalytic technology with the use of TiO2.The copper doped TiO2 photocatalyst with high activity is prepared and characterized by XRD and UV-Vis DRS in this study.Using glucose as electron donor,effects of copper loading,calcination temperature and glucose initial concentration on photocatalytic-H2 production activity are systematically studied.Experimental results show that the phase structure of TiO2 makes no change after doping with small amount of copper.At the same time,the light-absorption ability of copper doped TiO2 can be greatly improved.The optimum dosage of copper is 3%.Hydrogen production over copper doped TiO2（optimum dosage=3%）under 4 h irradiation is 25 mL,about two times longer than that of pure TiO2.