Tripathi, Anand Kumar and Mathpal, Mohan Chandra and Kumar, Promod and Singh, Manish Kumar and Mishra, Sheo Kumar and Srivastava, Rajneesh Kumar and Chung, Jin Suk and Verma, Govind and Ahmad, M. M. and Agarwal, Arvind (2014) Synthesis based structural and optical behavior of anatase TiO2 nanoparticles. Materials Science in Semiconductor Processing , 23. 136-143 . ISSN 1369-8001

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The effect of synthesis method on optical and photoconducting properties of titanium dioxide (TiO2) nanoparticles has been investigated. Sol-gel and co-precipitation methods have been employed to prepare pure anatase phased TiO2 nanoparticles calcinated at different temperatures below 500 degrees C. The optimized value of average crystallite size is within the range of 19-21 nm for a common calcination temperature of 400 degrees C for both the methods. The redshift in optical band gap of 0.9 eV has been observed for the sample synthesized by co-precipitation method with respect to the sol-gel method. The photoluminescence spectrum exhibits broad visible emission in both routes of synthesis while photoconductivity shows fast growth and decay of photocurrent in TiO2 prepared by co-precipitation method as compared to TiO2 prepared by the sol-gel method under visible illumination. Crystal structure based Rietveld refinement of X-ray diffraction data, scanning electron microscopy as well as photoluminescence and photoconductivity measurements were performed to characterize nanocrystalline anatase TiO2.

Item Type: Article
Additional Information: Copyright for this article belongs to M/S Elsevier.
Uncontrolled Keywords: Sol–gel Co-precipitation TiO2 Photoconductivity Nanomaterials
Subjects: Engineering
Materials Science
Depositing User: Dr. Rajpal Walke
Date Deposited: 23 Nov 2015 09:44
Last Modified: 23 Nov 2015 09:44

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