Title of article :
Co-doped ZnO nanopowders: Location of cobalt and reduction in photocatalytic activity
Author/Authors :
Rongliang He، نويسنده , , Rosalie K. Hocking، نويسنده , , Takuya Tsuzuki and Paul G. McCormick، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2012
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.
Keywords :
Nanostructures , Sol-gel growth , XAFS (EXAFS and XANES) , Co-doped ZnO , EXAFS , Photocatalysis
Journal title :
Materials Chemistry and Physics
Journal title :
Materials Chemistry and Physics