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Correlating Photoluminescence and Photocatalytic Activity of Mixed-phase Nanocrystalline Titania

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Abstract

Mixed-phase nanocrystalline titania with varying rutile-content has been synthesized via solvent mixing and calcination treatment of sol–gel derived nanocrystalline anatase and rutile precursors. The mixed-phase nanocrystalline titania has been characterized using different analytical techniques for analyzing their phase contents, nanocrystallite size distribution, band-gap, and photoluminescence. The photocatalytic activity of mixed-phase nanocrystalline titania has been studied by monitoring the degradation of methylene blue dye in an aqueous solution under ultraviolet-radiation exposure. A strong correlation between photoluminescence and photocatalytic activity has been demonstrated for the mixed-phase nanocrystalline titania.

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Acknowledgements

Authors thank the Department of Science and Technology (DST), India (Project # GAP 205139), and the Council of Scientific and Industrial Research (CSIR), India (Network Project # NWP0010 and Task Force Project # CMM0019) for funding the ceramic, nanotechnology, and photocatalysis research at NIIST-CSIR. Authors also thank Mr. P. Mukundan (NIIST-CSIR, India), and Mr. Narendra (Icon Analytical, India) for conducting the DR and TEM analyses.

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Correspondence to S. Shukla.

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Baiju, K.V., Zachariah, A., Shukla, S. et al. Correlating Photoluminescence and Photocatalytic Activity of Mixed-phase Nanocrystalline Titania. Catal Lett 130, 130–136 (2009). https://doi.org/10.1007/s10562-008-9798-5

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  • DOI: https://doi.org/10.1007/s10562-008-9798-5

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