TiO2 and TiO2-SiO2 thin films and powders by one-step soft-solution method: Synthesis and characterizations

A. Ennaoui, B. R. Sankapal, V. Skryshevsky, M. Ch Lux-Steiner

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53 Citations (Scopus)

Abstract

Simple soft-solution method has been developed to synthesize films and powders of TiO2 and mixed TiO2-SiO2 at relatively low temperatures. This method is simple and inexpensive. Furthermore, reactor can be designed for large-scale applications as well as to produce large quantities of composite powders in a single step. For the preparation of TiO2, we used aqueous acidic medium containing TiOSO4 and H2O2, which results in a peroxo-titanium precursor while colloidal SiO2 has been added to the precursor for the formation of TiO2-SiO2. Post annealing at 500 °C is necessary to have anatase structure. Resulting films and powders were characterized by different techniques. TiO2 (anatase) phase with (1 0 1) preferred orientation has been obtained. Also in TiO2-SiO2 mixed films and powders, TiO2 (anatase) phase was found. Fourier transform infrared spectroscopy (FTIR) results for TiO2 and mixed TiO 2-SiO2 films have been presented and discussed. The method developed in this paper allowed obtaining compact and homogeneous TiO 2 films. These compact films are highly photoactive when TiO 2 is used as photo anode in an photoelectrochemical cell. Nanoporous morphology is obtained when SiO2 colloids are added into the solution.

Original languageEnglish
Pages (from-to)1533-1541
Number of pages9
JournalSolar Energy Materials and Solar Cells
Volume90
Issue number10
DOIs
Publication statusPublished - 15 Jun 2006
Externally publishedYes

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Keywords

  • Characterizations
  • Photoactive
  • Synthesis
  • TiO
  • TiO-SiO

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films

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