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Photocatalytic properties of MIn(WO4)2 (M = Li, Na, and K)

Published online by Cambridge University Press:  03 March 2011

Zhaosheng Li ,
Jinhua Ye  and
Zhigang Zou
Zhaosheng Li
Affiliation:
Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures and Department of Materials Science and Technology, Nanjing University, Nanjing 210093, People’s Republic of China
Jinhua Ye
Affiliation:
Photocatalytic Ecomaterials Center, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0047, Japan
Zhigang Zou*
Affiliation:
Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected].
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Abstract

MIn(WO4)2 (M = Li, Na, and K) with InO6 and WO6 octahedra were synthesized via a conventional solid-state reaction method. The photophysical and photocatalytic properties were studied. Compared with WO3, which is unable to evolve H2 from an aqueous CH3OH solution under illumination, the three materials can evolve H2 and O2 from aqueous solutions with CH3OH and AgNO3 sacrificial reagents, respectively. The activity order of photocatalytic H2 evolution is NaIn(WO4)2 > LiIn(WO4)2 > KIn(WO4)2 under irradiation (λ > 200 nm). Under irradiation (λ > 300 nm), however, LiIn(WO4)2 has a high activity for photocatalytic H2 evolution over NaIn(WO4)2. It is also noteworthy that LiIn(WO4)2 and NaIn(WO4)2 exhibit the ability to split pure water. The results suggest that the bottoms of the conduction bands in these photocatalysts are raised to meet the potential requirements of photocatalytic H2 evolution.

Keywords

CatalyticPhotochemical
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 4 , April 2007 , pp. 958 - 964
Copyright
Copyright © Materials Research Society 2007

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