LIU Xing, LI Yuexiang
Department of Chemistry, Nanchang University, Nanchang 330031, China
Abstract: An efficient visible-light active photocatalyst of multilayer-EosinY-sensitized TiO2 was prepared through linkage of Al3+ to form 3-dimensional polymeric dye structure. The performance of the as-prepared photocatalyst was compared with multilayer-Eosin Y-sensitized TiO2 via Fe3+ coupling. The activity and stability of multilayer-dye-sensitized photocatalyst were investigated in water and methanol reaction system using triethanolamine as electron donor under visible light irradiation (l>420 nm). The effects of water content in methanol and Pt loading content were studied. In methanol reaction system, the photocatalyst exhibited high activity and stability when water content was 0.5% (volume fraction) and Pt loading content was 1.0 wt%. Its average apparent quantum yield for hydrogen evolution was 20.5% in 20 h with 220 turnover number. The high activity and stability could be attributed to that hydrolysis of Al3+ is lower than that of Fe3+, and 3-dimensional polymeric dye structure with Al3+ in methanol system is more stable than in water system. The further studies are in progress.
Keywords: Multilayer-Eosin Y; TiO2; Hydrogen evolution; Al3+; Methanol system
E-mail: liyx@ncu.edu.cn
Journal of Molecular Catalysis, Vol. 24, Issue 1, 2010, 71~76
