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Tuning mixed-phase Nb-doped titania films for high-performance photocatalysts with enhanced whole-spectrum light absorption

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Abstract

Recently, the use of TiO2 under visible (vis) light to degrade pollutants has attracted increasing attention. In our previous study, conductive anatase Nb-doped titania (NTO) thin films were demonstrated as a novel strategy to achieve good photocatalytic performance under visible light. However, the photocatalytic properties of conductive rutile NTO films are not yet known. In this study, a simple, controllable and effective method with a high deposition rate was developed to form NTO thin films with tunerable phases. By introducing a seed layer combined with suitable sputtering conditions, e.g. sputtering power, small crystalline clusters with rutile phase could be well controlled in the as-grown films and become a key factor to form NTO thin films with different phases. Interestingly, the NTO thin film with mixed anatase and rutile phases shows excellent photocatalytic performance due to its better absorption, more effective separation of photo-generated holes and electrons and high charge transfer. This result could bring new insight and promising application of NTO thin films in both conductive films and photocatalytic applications, particularly self-cleaning windows.

Graphical abstract: Tuning mixed-phase Nb-doped titania films for high-performance photocatalysts with enhanced whole-spectrum light absorption

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Publication details

The article was received on 18 Apr 2019, accepted on 17 Sep 2019 and first published on 23 Sep 2019


Article type: Paper
DOI: 10.1039/C9CY00745H
Catal. Sci. Technol., 2019, Advance Article

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    Tuning mixed-phase Nb-doped titania films for high-performance photocatalysts with enhanced whole-spectrum light absorption

    Y. Min, X. Yang, D. Wang, K. Yang, S. Zheng, S. Li, H. Chen, J. Liang and F. Pan, Catal. Sci. Technol., 2019, Advance Article , DOI: 10.1039/C9CY00745H

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