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Characterization of nanophase TiO2 synthesized by sol–gel method

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Abstract

Titanium dioxide (TiO2) nanoparticles have been prepared using sol–gel synthesis route and characterized by X-ray diffraction, transmission electron microscopy, infra-red spectroscopy, UV–visible spectroscopy, photoluminescence spectroscopy and Raman spectroscopy. Crystallite size and lattice strain on peak broadening of TiO2 nanoparticles have been studied using Williamson–Hall analysis. Absorption and photoluminescence spectra of anatase TiO2 samples have been shifted to the blue region, which has been attributed to quantum size effect. Raman bands for TiO2 nanoparticle samples slightly shift to higher wavenumber side compared to literature values for bulk sample, which could be due to the increasing force constants caused by reduction in particle size. Present study reveals that nonstoichiometry, defects and size variation of particles have a great influence on optical band gap, blue shift and Raman band modification, which in turn enhance optical absorption performance and photo-activity of TiO2 nanoparticles.

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Acknowledgments

Authors thank Nirmala College, Muvattupuzha for providing opportunity to undertake this study. Authors are grateful to KSCSTE, Thiruvananthapuram for providing financial support to carry out this investigation.

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Authors and Affiliations

  1. Department of Physics, Nanoscience Research Centre (NSRC), Nirmala College, Muvattupuzha, 686 661, Kerala, India

    K. P. Priyanka, N. Aloysius Sabu & T. Varghese

  2. M.E.S. Asmabi College, P. Vemballur, 680671, Kerala, India

    P. A. Sheena

  3. Holly Kings College of Engineering and Technology, Pampakkuda, 686 667, Kerala, India

    T. George

  4. Department of Studies in Physics, Mangalore University, Mangalagangotri, 574 199, Karnataka, India

    K. M. Balakrishna

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  1. K. P. Priyanka
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  2. P. A. Sheena
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  3. N. Aloysius Sabu
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  4. T. George
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  5. K. M. Balakrishna
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  6. T. Varghese
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Correspondence to T. Varghese.

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Priyanka, K.P., Sheena, P.A., Aloysius Sabu, N. et al. Characterization of nanophase TiO2 synthesized by sol–gel method. Indian J Phys 88, 657–663 (2014). https://doi.org/10.1007/s12648-014-0475-9

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