Issue 11, 2013
From the journal:

Nanoscale

Synthesis of uniformly dispersed anatase nanoparticles inside mesoporous silica thin films via controlled breakup and crystallization of amorphous TiO2 deposited using atomic layer deposition

Sreeprasanth Pulinthanathu Sree,a   Jolien Dendooven,b   Kasper Masschaele,a   Heidari M. Hamed,c   Shaoren Deng,b   Sara Bals,c   Christophe Detavernierb  and  Johan A. Martens*a  

* Corresponding authors

a Centre for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg 23, Leuven B-3001, Belgium
E-mail: Johan.Martens@biw.kuleuven.be
Fax: +32 16321998
Tel: +32 16321637

b Department of Solid-State Physics, Ghent University, Krijgslaan 281/S1, B-9000 Gent, Belgium

c EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium

Abstract

Amorphous titanium dioxide was introduced into the pores of mesoporous silica thin films with 75% porosity and 12 nm average pore diameter via Atomic Layer Deposition (ALD) using alternating pulses of tetrakis(dimethylamino)titanium and water. Calcination provoked fragmentation of the deposited amorphous TiO2 phase and its crystallization into anatase nanoparticles inside the nanoporous film. The narrow particle size distribution of 4 ± 2 nm and the uniform dispersion of the particles over the mesoporous silica support were uniquely revealed using electron tomography. These anatase nanoparticle bearing films showed photocatalytic activity in methylene blue degradation. This new synthesis procedure of the anatase nanophase in mesoporous silica films using ALD is a convenient fabrication method of photocatalytic coatings amenable to application on very small as well as very large surfaces.

Graphical abstract: Synthesis of uniformly dispersed anatase nanoparticles inside mesoporous silica thin films via controlled breakup and crystallization of amorphous TiO2 deposited using atomic layer deposition

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Article information

DOI
https://doi.org/10.1039/C3NR00594A
Article type
Paper
Submitted
01 Feb 2013
Accepted
03 Apr 2013
First published
09 Apr 2013

Nanoscale, 2013,5, 5001-5008

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Synthesis of uniformly dispersed anatase nanoparticles inside mesoporous silica thin films via controlled breakup and crystallization of amorphous TiO2 deposited using atomic layer deposition

S. P. Sree, J. Dendooven, K. Masschaele, H. M. Hamed, S. Deng, S. Bals, C. Detavernier and J. A. Martens, Nanoscale, 2013, 5, 5001 DOI: 10.1039/C3NR00594A

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