Co-doped ZnO nanopowders: location of cobalt and reduction in photocatalytic activity

He, Rongliang, Hocking, Rosalie K., and Tsuzuki, Takuya (2012) Co-doped ZnO nanopowders: location of cobalt and reduction in photocatalytic activity. Materials Chemistry and Physics, 132 (2-3). pp. 1035-1040.

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Abstract

The location of dopant ions and the effect of doping level on the photocatalytic activity have been investigated on Co-doped ZnO nanopowders. A co-precipitation method was used to prepare ZnO nanoparticles of <50 nm in diameter doped with up to 5 at% of Co. The crystal structure of nanoparticles and local atomic arrangements around dopant ions were analysed by X-ray diffraction and extended X-ray absorption fine structure spectroscopy using synchrotron radiation. The results showed the Co ions substituted the Zn ions in ZnO crystal lattice and induced lattice shrinkage. The photocatalytic activity under simulated sunlight irradiation was characterised by the decomposition of Rhodamine B dye molecules, which revealed the successful reduction of photocatalytic activity by Co-doping.

Item ID: 28907
Item Type: Article (Research - C1)
ISSN: 1879-3312
Keywords: nanostructures, sol-gel growth, XAFS (EXAFS and XANES), Co-doped ZnO, EXAFS, photocatalysis
Date Deposited: 21 Aug 2013 09:22
FoR Codes: 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030207 Transition Metal Chemistry @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 50%
85 ENERGY > 8505 Renewable Energy > 850504 Solar-Photovoltaic Energy @ 50%
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