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30.03.2010


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Solid State Sciences
Volume 12, Issue 4, April 2010, Pages 490-497













doi:10.1016/j.solidstatesciences.2009.12.013 | How to Cite or Link Using DOI
Copyright © 2009 Elsevier Masson SAS All rights reserved.
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Mesoporous TiO2−xAy (A = N, S) as a visible-light-response photocatalyst





Jinshu WangCorresponding Author Contact Information, a, E-mail The Corresponding Author, Hui Lia, Hongyi Lia and Chen Zoua






a College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, People's Republic of China





Received 19 October 2009; 


revised 4 December 2009; 


accepted 14 December 2009. 


Available online 23 December 2009.







Abstract


Mesoporous TiO2−xAy (A = N, S) thin films were fabricated using thiourea as a doping resource by a combination of sol-gel and evaporation-induced self-assembly (EISA) processes. The results showed that thiourea could serve two functions of co-doping nitrogen and sulfur and changing the mesoporous structure of TiO2 thin films. The resultant mesoporous TiO2−xAy (A = N, S) exhibited anatase framework with a high porosity and a narrow pore distribution. The formation of the O–Ti–N and O–Ti–S bonds in the mesoporous TiO2−xAy (A = N, S) were substantiated by the XPS spectra. A new bandgap in visible light region (520 nm) corresponding to 2.38 eV could be formed by the co-doping. After being illuminated for 3 h, methyl orange could be degraded nearly completely by the co-doped sample under both ultraviolet irradiation and visible light illumination. While pure mesoporous TiO2 could only degrade 60% methyl orange under UV illumination and showed negligible photodegradation capability in the visible light range. Furthermore, the photo-induced hydrophilic activity of TiO2 film was improved by the co-doping. The mesoporous microstructure and high visible light absorption could be attributed to their good photocatalytic acitivity and hydrophilicity.







Graphical abstract



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Keywords: Mesoporous film; TiO2−xAy (A = N, S); Visible-light-response; Photocatalyst





Article Outline



1. Introduction
2. Experimental section

2.1. Catalyst synthesis
2.2. Characterization
2.3. Photocatalytic activity testing
2.4. Photo-induced hydrophilicity study

3. Results and discussion

3.1. Composition of the samples
3.2. Morphology and pore size of the samples
3.3. Light absorption capability
3.4. Photocatalytic activity of the samples
3.5. Hydrophilicity of the samples

4. Conclusions
Acknowledgements
References
























































































Corresponding author. Tel./fax: +86 10 67391101.












Solid State Sciences
Volume 12, Issue 4, April 2010, Pages 490-497




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  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

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