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Issue 14, 2010
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Photocatalytic performances of mesoporous TiO2 films doped with gold clusters

Jinjin Zhao,a  Sébastien Sallard,*b  Bernd M. Smarsly,b  Silvia Gross,c  Massimo Bertino,d  Cédric Boissière,e  Hangrong Chena  and  Jianlin Shi*a 
Author affiliations

* Corresponding authors

a Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi Road 1295, Shanghai, P. R. (China)
E-mail: jlshi@sunm.shcnc.ac.cn
Fax: +0086 21 52413122
Tel: +0086 21 52412712

b Justus-Liebig Universität Giessen, Institute of Physical Chemistry, Heinrich-Buff-Ring 58, Giessen, Germany
E-mail: sebastien.sallard@phys.chemie.uni-giessen.de
Fax: +0049 641994509
Tel: +0049 641 9934585

c CNR–ISTM, Dipartimento di Scienze Chimiche, Universitá degli Studi di Padova and INSTM UdR, Padova, via Marzolo, 1, Padova, Italy

d Department of Physics, Virginia Commonwealth University, 701 West Grace Street, Richmond, USA

e Laboratoire de Chimie de la Matière Condensée de Paris, Université Pierre et Marie Curie-Paris 6, CNRS, 4 place Jussieu, Paris cedex 05, France

Abstract

We report on the single-pot fabrication of ordered mesoporous crystallized titania films doped with gold. Au is incorporated in TiO2 films by adding to the coating solution precursors such as AuCl3 or monodisperse Au113+ nanoclusters, and Au nanoparticles are formed by calcination. A systematic study is performed to correlate structure, Au doping and photocatalytic activity of such films. Two-dimensional small angle X-ray scattering (2D-SAXS), transmission electronic microscopy (TEM), scanning electronic microscopy (SEM) and porosimetry–ellipsometry show that the films retain their mesoporous order even for doping levels as high as 1% Au : Ti atomic ratio. Wide angle X-ray scattering (WAXS), and cyclovoltammetry (CV) show that Au113+ nanoclusters promote the formation of the TiO2 (B) phase in competition with the anatase phase. AuCl3 stabilizes instead only the anatase phase. The highest photocatalytic activity is exhibited by films where Au113+ is employed as a precursor, which we attribute to the combination of the mixed anatase/TiO2 (B) phase, of Au nanoparticle doping and of a well-ordered mesoporous TiO2 matrix.

Graphical abstract: Photocatalytic performances of mesoporous TiO2 films doped with gold clusters

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Publication details

The article was received on 18 Sep 2009, accepted on 21 Dec 2009 and first published on 10 Feb 2010


Article type: Paper
DOI: 10.1039/B919536J
Citation: J. Mater. Chem., 2010,20, 2831-2839
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    Photocatalytic performances of mesoporous TiO2 films doped with gold clusters

    J. Zhao, S. Sallard, B. M. Smarsly, S. Gross, M. Bertino, C. Boissière, H. Chen and J. Shi, J. Mater. Chem., 2010, 20, 2831
    DOI: 10.1039/B919536J

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