Influence of calcination atmosphere on photocatalytic reactivity of K₂La₂Ti₃O₁₀ for water splitting

来源期刊：中国有色金属学报(英文版)2007年第4期

论文作者：杨亚辉 邱冠周 陈启元 冯其明 尹周澜

文章页码：836 - 836

Key words：K₂La₂Ti₃O₁₀; calcination atmosphere; photocatalytic activity; hydrogen

Abstract: The layered perovskite type oxide K₂La₂Ti₃O₁₀ powders were prepared under air, Ar and H₂ calcination atmospheres by sol-gel method and characterized by X-ray diffractometry, UV-Vis diffuse reflectance and X-ray photoelectron spectroscopy. The influence of the calcination atmosphere on the photocatalytic reactivity of K₂La₂Ti₃O₁₀ for hydrogen production was investigated. The photocatalytic reactivity of K₂La₂Ti₃O₁₀ prepared under air, Ar and H₂ atmospheres was compared with that prepared under ultraviolet and visible light radiation using I^- as electronic donor. The results show that K₂La₂Ti₃O₁₀ prepared under Ar and H₂ atmospheres has higher photocatalytic activity for hydrogen production than that prepared under air atmosphere. The hydrogen production rates under ultraviolet irradiation are 127.5, 81.3 and 57.0 μmol/(L？h) and those under visible light irradiation are 40.2, 30.2 and 16.5 μmol/(L？h) respectively when K₂La₂Ti₃O₁₀ is prepared under Ar, H₂ and air atmospheres.

基金信息：the National High-Tech Research and Development Program of China