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Solvothermal synthesis of a highly branched Ta-doped TiO2

Published online by Cambridge University Press:  23 September 2011

Shermin Arab ,
Dongsheng Li ,
Nichola Kinsinger ,
Francisco Zaera  and
David Kisailus
Shermin Arab
Affiliation:
Department of Electrical Engineering, University of California Riverside, Riverside, California 92521; and Materials Science and Engineering Program, University of California Riverside, Riverside, California 92521
Dongsheng Li
Affiliation:
Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, California 92521
Nichola Kinsinger
Affiliation:
Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, California 92521
Francisco Zaera
Affiliation:
Department of Chemistry, University of California Riverside, Riverside, California 92521
David Kisailus*
Affiliation:
Materials Science and Engineering Program, University of California Riverside, Riverside, California 92521; and Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, California 92521
*
a)Address all correspondence to this author. e-mail: david@engr.ucr.edu
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Abstract

We present a low-temperature, hydrothermal synthesis method for Ta-doped TiO2. Here, alkoxide-based precursors are mixed at low temperatures to suppress differential hydrolysis and phase separation. This method ensures homogeneous, molecular mixing of the Ta dopant with the native oxide up to a concentration of ∼2.5 at.%. X-ray diffraction and energy dispersive spectrometer analyses confirm a uniformly doped rutile TiO2. Scanning electron microscopy and transmission electron microscopy analyses reveal a highly branched structure. Optoelectronic properties of these structures were investigated using ultraviolet-visible spectroscopy and low-temperature photoluminescence.

Keywords

HydrothermalSol–gelCrystal growth
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 20 , 28 October 2011 , pp. 2653 - 2659
Copyright
Copyright © Materials Research Society 2011

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