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Sol-Gel Synthesis and Characterization of Neodymium-Ion Doped Nanostructured Titania Thin Films

Published online by Cambridge University Press:  15 March 2011

Andrew Burns ,
W. Li ,
C. Baker  and
S.I. Shah
Andrew Burns
Affiliation:
Department of Material Science and Engineering, University of Delaware, Newark, DE 19716
W. Li
Affiliation:
Department of Material Science and Engineering, University of Delaware, Newark, DE 19716
C. Baker
Affiliation:
Department of Material Science and Engineering, University of Delaware, Newark, DE 19716
S.I. Shah
Affiliation:
Department of Material Science and Engineering, University of Delaware, Newark, DE 19716 Department of Physics and AstronomyUniversity of Delaware, Newark, DE 19716
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Abstract

Nd doped TiO2 nanostructured thin films were prepared by sol-gel technique on quartz and Si substrates using TiCl4 precursor. As-deposited amorphous films were annealed to form anatase phase in the thin films. The film grain size increased with annealing temperature. Above 800°C, rutile began to segregate and the grain size decreased slightly.

The photodegradation of 2-chlorophenol (2-CP) was studied. Doping TiO2 with Nd+3 reduced the photodegradation time. The difference in the ionic radii of Nd+3 and Ti+4 and the oxygen affinities of Nd and Ti were responsible for this effect. These differences help promote electron trapping, thereby increasing the lifetime of the holes which are responsible for the oxidation of 2-CP.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 703: Symposia U/V – Nanophase and Nanocomposite Materials IV , 2001 , V5.2
Copyright
Copyright © Materials Research Society 2002

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References

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