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Photophysical and photocatalytic properties of Li2M(WO4)2 (M = Co and Ni)

Published online by Cambridge University Press:  31 January 2011

Jun Lv ,
Yupeng Yuan ,
Xianli Huang ,
Haifeng Shi ,
Hanmin Tian ,
Zhaosheng Li ,
Tao Yu ,
Jinhua Ye  and
Zhigang Zou
Jun Lv
Affiliation:
Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures, Nanjing 210093, China; and Department of Materials Science and Technology, Nanjing University, Nanjing 210093, China
Yupeng Yuan
Affiliation:
Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures, Nanjing 210093, China; and Department of Materials Science and Technology, Nanjing University, Nanjing 210093, China
Xianli Huang
Affiliation:
Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures, Nanjing 210093, China; and Department of Physics, Nanjing University, Nanjing 210093, China
Haifeng Shi
Affiliation:
Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures, Nanjing 210093, China; and Department of Materials Science and Technology, Nanjing University, Nanjing 210093, China
Hanmin Tian
Affiliation:
Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures, Nanjing 210093, China; and Department of Materials Science and Technology, Nanjing University, Nanjing 210093, China
Zhaosheng Li
Affiliation:
Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures, Nanjing 210093, China; and Department of Materials Science and Technology, Nanjing University, Nanjing 210093, China
Tao Yu
Affiliation:
Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures, Nanjing 210093, China; and Department of Physics, Nanjing University, Nanjing 210093, China
Jinhua Ye
Affiliation:
Photocatalytic Materials Center, National Institute for Materials Science (NIMS), Ibaraki 305-0047, Japan
Zhigang Zou*
Affiliation:
Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures, Nanjing 210093, China; and Department of Physics, Nanjing University, Nanjing 210093, China
*
a)Address all correspondence to this author. e-mail: zgzou@nju.edu.cn
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Abstract

Li2M(WO4)2 (M = Co and Ni) were synthesized by a conventional solid-state reaction method and characterized by powder x-ray diffraction, Brunauer-Emmet-Teller (BET) measurement, ultraviolet-visible (UV-vis) diffuse reflectance spectra, Raman spectroscopy, and photocatalytic evaluation measurements. Photocatalytic water splitting results showed that Li2M(WO4)2 (M = Co and Ni) exhibited abilities for H2 evolution with Pt cocatalyst from an aqueous methanol solution and for O2 evolution from an aqueous AgNO3 solution under UV light irradiation. Theoretical calculation, absorbance analysis, and photocatalytic H2 evolution experiment revealed that the position of W 5d level shifted to the negative side with respect to the reduced potential of H+/H2. The photocatalytic H2 evolution over Li2M(WO4)2 is discussed from the view of crystal and electronic structure point.

Keywords

AbsorptionCatalyticOxide
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 12: Biomimetic and Bio-enabled Materials Science and Engineering , December 2008 , pp. 3309 - 3315
Copyright
Copyright © Materials Research Society 2008

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References

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