ZHANG Chuanzhao, CHEN Wei, LI Caolong, HE Xuezhi, YUAN Jian1), SHANGGUAN Wenfeng
(Research Center for Combustion and Environment Technology, Shanghai JiaoTong University, Shanghai 200240, China)
Abstract: Titanate nanotube (TiNT) was made from commercial titanium dioxide powder (P25, Degussa) through hydrothermal- ultrasonic method. Then CdS combined TiNT was prepared via simple ion exchange. Co-catalyst Pt or Cu was loaded by wet impregnation method. The photocatalytic reduction of CO2 and H2O vapor on the catalysts was investigated at room temperature and atmospheric pressure. The morphology, crystal structure, photon absorption property and surface area of synthesized samples were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-Vis DRS and BET, etc. The experiment result shows that the specific surface area of titanate nanotube is 274.6m2/g, which is 4 times more than that of P25. The main photocatalytic products on CdS/TiNT are carbon monoxide and methane. After loaded with Pt or Cu, the yield of carbon monoxide(0.32 umol•h-1•gTi-1) is almost 1.5 times of the yield of CdS/TiNT and the yield of methane(0.13 umol•h-1•gTi-1) is increased about 3 times compared with that of samples without Pt or Cu loading.
Key words: photocatalysis, carbon dioxide, methane, titanate nanotubes
E-mail: janeyuan@sjtu.edu.cn
Journal of Molecular Catalysis, Vol. 25, Issue 6, 2011, 563-568
