Photoelectrochemical study of oxygen deficient TiO2 nanowire arrays with CdS quantum dot sensitization

Hanyu Wang; Gongming Wang; Yichuan Ling; Marion Lepert; Changchun Wang; Jin Z. Zhang; Yat Li

doi:10.1039/C2NR11278G

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Photoelectrochemical study of oxygen deficient TiO₂nanowire arrays with CdS quantum dot sensitization†‡

Hanyu Wang,^a Gongming Wang,^a Yichuan Ling,^a Marion Lepert,^a Changchun Wang,^b Jin Z. Zhang^a and Yat Li*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry and Biochemistry, University of California, Santa Cruz, California, USA
E-mail: yli@chemistry.ucsc.edu

^b Key Laboratory of Molecular Engineering of Polymer (Minister of Education), Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai, People's Republic of China

Abstract

Oxygen-deficient TiO₂ nanowires show substantially increased donor density due to an increase in oxygen vacancies introduced intentionally by thermal treatment in ammonia, vacuum, or hydrogen. By coupling oxygen-deficient TiO₂ nanowires with CdS quantum dots, a significant enhancement in their photoactivities was observed in the entire wavelength region from 350 to 550 nm. These new nanocomposites hold great promise for solar hydrogen generation.

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Article information

DOI: https://doi.org/10.1039/C2NR11278G
Article type: Communication
Submitted: 10 Sep 2011
Accepted: 29 Dec 2011
First published: 27 Jan 2012

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Nanoscale, 2012,4, 1463-1466

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Photoelectrochemical study of oxygen deficient TiO₂ nanowire arrays with CdS quantum dot sensitization

H. Wang, G. Wang, Y. Ling, M. Lepert, C. Wang, J. Z. Zhang and Y. Li, Nanoscale, 2012, 4, 1463 DOI: 10.1039/C2NR11278G

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