Porkodi, P. and Yegnaraman, V. and Jeyakumar, D. (2006) Polyol mediated synthesis of tungsten trioxide and Ti doped tungsten trioxide Part 1: Synthesis and characterisation of the precursor material. Materials Research Bulletin, 41 (8). pp. 1476-1486. ISSN 0025-5408

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Abstract

Polyol mediated synthesis for the preparation of tungsten trioxide and titanium doped tungsten trioxide has been reported. The reaction was carried out using chlorides of tungsten and titanium in diethylene glycol medium and water as the reagent for hydrolysis at 190 8C. Formation of a blue coloured dimensionally stable suspension of the precursor materials was observed during the course of the reaction. The particle sizes of the precursor materials were observed to be around 100 nm. The precursor materials were annealed to give tungsten trioxide and titanium doped tungsten trioxide. The precursor materials were characterised using TGA/DTA, FT-IR, optical spectra, SEM, TEM and powder XRD methods. It was observed that the doping of titanium could be effected at least up to 10% of Ti in WO3. The TGA/DTA studies indicated that WO3xH2O is the dominant material that formed during the polyol mediated synthesis. The XRD data of the annealed samples revealed that the crystalline phase could be manipulated by varying the extent of titanium doping in the tungsten trioxide matrix.

Item Type:	Article
Uncontrolled Keywords:	Oxides; Semiconductors; Infrared spectroscopy; Thermogravimetric analysis; X-ray diffraction
Subjects:	Functional Materials
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	06 Apr 2012 04:16
Last Modified:	06 Apr 2012 04:16
URI:	http://cecri.csircentral.net/id/eprint/777

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