Photocatalytic activities for hydrogen evolution of new layered compound series HLaTa(x/3)Nb2-x/3O(7)/Pt (x=0, 2, 3, 4, and 6).
HLaTa(x/3)Nb(2-x/3)O(7) were synthesized by successive reactions of conventional solid-state reaction followed by ion exchange reaction. They were characterized by power X-ray diffraction, UV-vis diffusive reflectance and scan electron microscope. The effect of substitution of Ta for Nb in HLaNb(2)O(7) has been studied on the photocatalytic decomposition of water under UV light irradiation with methanol as electron donor and Pt as promoter catalyst. The x value in HLaTa(x/3)Nb(2-x/3)O(7) had an important effect on the photocatalytic activity of the catalyst. When x=2, HLaTa(2/3)Nb(4/3)O(7)/Pt shows a photocatalytic activity of 136 cm(3)g(-1)h(-1) hydrogen evolution in rate 10 vol.% methanol aqueous solution under irradiation with wavelength more than 290 nm from a 100-W mercury lamp.
Li
Yibin
Y
The Key Laboratory for College of Materials Science and Engineering, Huaqiao University of Fujian Higher Education, Institute of Materials Physical Chemistry, Huaqiao University, Quanzhou 362021, China.
Huang
Yunfang
Y
Wu
Jihuai
J
Huang
Miaoling
M
Lin
Jianming
J
D002384:Catalysis; D006859:Hydrogen / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry*; D009556:Niobium / Q000737:chemistry*; D055668:Photochemical Processes; D013635:Tantalum; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry*
D009556:Niobium; D014867:Water; D013635:Tantalum; D007811:Lanthanum; D006859:Hydrogen