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Acta Phys. -Chim. Sin.  2009, Vol. 25 Issue (06): 1107-1110    DOI: 10.3866/PKU.WHXB20090624
Article     
Effect of Fe3+ Doping on Photocatalytic Activity of K2La2Ti3O10 for Water Decomposition to Hydrogen under Visible Light
CHEN Wei, DONG Xin-Fa, CHEN Zhi-Shan, CHEN Sheng-Zhou, LIN Wei-Ming
Guangdong Provincial Laboratory of Green Chemical Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China|School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
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Abstract  

Undoped K2La2Ti3O10 and Fe3 + doped K2La2Ti3O10 samples were prepared by the sol-gel method and characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectra (DRS) and X-ray photoelectron spectroscopy (XPS). The effects of Fe3+ doping quantity on the properties and photocatalytic activity for hydrogen evolution were investigated. Results showed that Fe-doped K2La2Ti3O10 showed stronger absorption in the 400-650 nm range and this expanded to the visible light (λ>400 nm). Doping with Fe3+ raised the photocatalytic activity for hydrogen generation and the optimumamount of Fe3+ doping was found to be nFe/nTi=0.04. At this ratio and under visible light the rate of hydrogen evolution of Fe-K2La2Ti3O10 was 1.92 μmol·h-1 and this was 4 times higher than that of undoped K2La2Ti3O10 when 120 mL of reactive liquid (CH3OH(30 mL)+H2O(90 mL)) containing 0.1 g photocatalyst was used.



Key wordsPhotocatalysis      Fe3+-doped      K2La2Ti3O10      Visible light      Water decomposition      Hydrogen     
Received: 20 February 2009      Published: 10 April 2009
MSC2000:  O643  
Corresponding Authors: DONG Xin-Fa     E-mail: cexfdong@scut.edu.cn
Cite this article:

CHEN Wei, DONG Xin-Fa, CHEN Zhi-Shan, CHEN Sheng-Zhou, LIN Wei-Ming. Effect of Fe3+ Doping on Photocatalytic Activity of K2La2Ti3O10 for Water Decomposition to Hydrogen under Visible Light. Acta Phys. -Chim. Sin., 2009, 25(06): 1107-1110.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20090624     OR     http://www.whxb.pku.edu.cn/Y2009/V25/I06/1107

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