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Visible Light Driven Photocatalytic Activity of Granular Pr Doped LaFeO3

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Abstract

The use of the perovskite oxides as the photocatalyst for the degradation of the aquatic pollutants and for the renewable energy production (by converting the solar energy into the chemical energy) is of huge research interest. The effect of Pr doping on the photocatalytic activity of the perovskite oxide LaFeO3 synthesized by the sol–gel route has been investigated. The materials are characterized by the scanning electron microscopy, UV–Visible diffuse reflectance spectroscopy, photoluminescence spectroscopy and impedance spectroscopy. The photocatalytic activity of the materials is achieved by the photocatalytic decomposition of the aqueous solution of the pollutant rhodamine B (Rh-B) under the visible light irradiation. The Pr doped materials show more enhanced photocatalytic efficiency than the pure LaFeO3. The 50% Pr doped LaFeO3 (La0.5Pr0.5FeO3) shows 93% degradation of Rh-B in 4 h. The enhanced photocatalytic activity of Pr doped LaFeO3 may be due to the increased optical absorption, the decreased recombination probability of the electron–hole pairs, as well as the efficient migration of the photogenerated charge carriers. The mechanism of the photocatalytic activity of the materials has also been discussed.

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Acknowledgments

Ritwik Maity and Md. Sariful Sheikh acknowledge the Department of Science and Technology, Government of India for providing the financial support through the Inspire Fellowship (IF160046 and IF150220, respectively). Alo Dutta thanks the Department of Science and Technology of India for providing the financial support through the DST Fast Track Project under Grant no. SR/FTP/PS-175/2013.

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Authors and Affiliations

  1. Department of Physics, Bose Institute, 93/1 Acharya Prafulla Chandra Road, Kolkata, 700009, India

    Ritwik Maity, Md. Sariful Sheikh & T. P. Sinha

  2. Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata, 700098, India

    Alo Dutta

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  1. Ritwik Maity
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  2. Md. Sariful Sheikh
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Maity, R., Sheikh, M.S., Dutta, A. et al. Visible Light Driven Photocatalytic Activity of Granular Pr Doped LaFeO3. J. Electron. Mater. 48, 4856–4865 (2019). https://doi.org/10.1007/s11664-019-07285-5

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