Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 17    No. 4    August 2007

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Influence of calcination atmosphere on photocatalytic reactivity of K2La2Ti3O10 for water splitting
YANG Ya-hui(杨亚辉)1, 2, QIU Guan-zhou(邱冠周)2,
CHEN Qi-yuan(陈启元)1, FENG Qi-ming(冯其明)2, YIN Zhou-lan(尹周澜)1

1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
2. School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China

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.

 

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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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