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Transparent Nb-doped TiO2 Film with [001] Preferred Orientation for Efficient Photocatalytic Oxidation Performance

Abstract

Doping and tailoring crystal orientation are two main strategies to improve the photocatalytic properties of TiO2 film. Herein, we introduce a novel route of obtaining Nb-doped TiO2 anatase film with [001] preferred orientation by thermal oxidation of the magnetron-sputtering-prepared [100]-oriented Nb-doped TiN film. Comprehensive analyses with X-ray diffraction, Raman scattering, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy indicate that the proportion of high-energy (001) facets of the Nb-doped TiO2 film is more than 90% and the Nb5+ ion is successfully doped into the film without destroying the crystallinity and orientation. Moreover, the Nb5+ ion doping significantly restrains the growth of the TiO2 grains and increases the surface roughness, and consequently increases the surface-reactive sites. Therefore, the as-fabricated Nb-doped TiO2 film exhibits efficient photocatalytic oxidation performance for acetaldehyde and oleic acid decomposition under simulated solar light irradiation. Such Nb-doped TiO2 anatase film with high-reactivity (001) facets exposure may find applications in photocatalysis and solar energy conversion fields.

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Publication details

The article was received on 17 Aug 2017, accepted on 09 Oct 2017 and first published on 09 Oct 2017


Article type: Paper
DOI: 10.1039/C7DT03057F
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Transparent Nb-doped TiO2 Film with [001] Preferred Orientation for Efficient Photocatalytic Oxidation Performance

    L. Kong, C. Wang, F. Wan, L. Li, X. Zhang and Y. Liu, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT03057F

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