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Cadmium- and indium-doped zinc oxide by combustion synthesis using dopant chloride precursors

Published online by Cambridge University Press:  03 March 2011

G. Yogeeswaran ,
C.R. Chenthamarakshan ,
N.R. de Tacconi  and
K. Rajeshwar
G. Yogeeswaran
Affiliation:
Materials Science and Engineering Program, The University of Texas, Arlington, Texas 76019-0065
C.R. Chenthamarakshan
Affiliation:
Center for Renewable Energy Science and Technology, Department of Chemistry and Biochemistry, The University of Texas, Arlington, Texas 76019-0065
N.R. de Tacconi
Affiliation:
Center for Renewable Energy Science and Technology, Department of Chemistry and Biochemistry, The University of Texas, Arlington, Texas 76019-0065
K. Rajeshwar*
Affiliation:
Center for Renewable Energy Science and Technology, Department of Chemistry and Biochemistry, The University of Texas, Arlington, Texas 76019-0065
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

Cadmium-doped ZnO was prepared for the first time by combustion synthesis using CdCl2 as a dopant precursor, with zinc nitrate and urea as the combustion mixture. Unlike previous studies of combustion synthesis of ZnO in the presence of an indium nitrate precursor, which resulted in (ZnO)mIn2O3 (m = 3 or 4) compound formation, In-doped ZnO was prepared by combustion synthesis in this study using an InCl3 precursor. The doped samples were compared and contrasted with undoped ZnO using scanning electron microscopy, x-ray powder diffraction, energy-dispersive x-ray analyses, and x-ray photoelectron spectroscopy. Diffuse reflectance spectroscopy showed the optical band gap of ZnO to shrink from 3.14 to 3.07 eV and 3.02 eV on Cd and In doping, respectively. Finally, the doped samples showed an improved photoelectrochemical response relative to undoped ZnO over the wavelength range from ∼300 to ∼450 nm.

Keywords

Combustion synthesisDopant
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 12 , December 2006 , pp. 3234 - 3241
Copyright
Copyright © Materials Research Society 2006

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