Verma, Amita and Goyal, Anshu and Sharma, R. K. (2008) Microstructural, photocatalysis and electrochemical investigations on CeTi2O6 thin films. Thin Solid Films, 516 (15). pp. 4925-4933. ISSN 0040-6090

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Abstract

The properties of sol–gel derived CeTi2O6 thin films deposited using a solution of cerium chloride heptahydrate and titanium propoxide in ethanol are discussed. The effect of annealing temperature on structural, optical, photoluminescence, photocatalysis and electrochemical characteristics has been examined. Lowest annealing temperature for the formation of crystalline CeTi2O6 phase in these samples is identified as 580 °C. The optical transmittance of the films is observed to be independent of the annealing temperature. The optical energy bandgap of the 600 °C annealed film for indirect transition is influenced by the presence of anatase phase of TiO2 in its structure. Fourier transform infrared spectroscopy investigations have evidenced increased bond strength of the Ti–O–Ti network in the films as a function of annealing temperature. The photoluminescence intensity of the films has shown dependence on the annealing temperature with the films fired at 450 °C exhibiting the maximum photoluminescence activity. The decomposition of methyl orange and eosin (yellow) under UV–visible light irradiation in the presence of crystalline CeTi2O6 films shows the presence of photoactivity in these films. The photocatalytic response of CeTi2O6 films is found to be superior to the TiO2 films. In comparison to crystalline films, the amorphous films have shown superior electrochemical characteristics. The 500 °C annealed amorphous films have exhibited the most appropriate properties for incorporation in electrochromic devices comprising tungsten oxide as the primary electrochromic electrode.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	Sol–gel; Thin films; Cerium titanate; Annealing; X-ray diffraction; Electrochemistry; Electrochromism
Subjects:	Materials Science Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	17 Apr 2015 07:04
Last Modified:	17 Apr 2015 07:04
URI:	http://npl.csircentral.net/id/eprint/1100

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