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Photocatalytic and catalytic removal of toxic pollutants from water using CuO nanosheets

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Abstract

CuO nanosheets with efficient catalytic and photocatalytic activities were prepared by a simple wet chemical approach. Effects of polyvinylpyrrolidone (PVP) on the morphological, structural, optical, catalytic and photocatalytic behavior of prepared CuO nanosheets have been explored. Morphological and structural properties of the prepared CuO nanosheets were analyzed using XRD and field electron scanning electron microscopy, while optical, catalytic and photocatalytic examinations were done using UV–Vis absorption spectroscopy. Average width of nanosheets was found to decrease from 58 to 50 nm while their average length decreased from 289 to 264 nm with increase in PVP concentration. Increase in PVP concentration resulted in decrease in average crystallite size of the prepared CuO nanosheets from 15 to 13 nm whereas their BET surface area increased from 20.4 to 29.8 m2/g. The catalytic and photocatalytic responses of CuO nanosheets were easily controlled by varying the concentration of PVP used in the synthesis. CuO nanosheets prepared utilizing an optimal PVP concentration exhibited improved photocatalytic and catalytic activities as compared to pristine CuO nanosheets. The prepared CuO nanosheets completely degraded MB and MO in 150 and 180 min, respectively. Transformation of harmful 4-nitrophenol into 4-aminopheol by CuO nanosheets also took place in just 5 min.

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Acknowledgements

The authors would like to thank Tarun and Srikanth for their help in sample preparation and XRD measurements, respectively. KS would like to thank DST, New Delhi for funding DST Women Scientist project (SR/WOS-A/PM-10/2017(G&C)).

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Authors and Affiliations

  1. University School of Basic and Applied Sciences, Guru Gobind Singh Indraprastha University, Dwarka, New Delhi, 110078, India

    Kavita Sahu, Jaspal Singh & Satyabrata Mohapatra

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  1. Kavita Sahu
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  2. Jaspal Singh
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  3. Satyabrata Mohapatra
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Correspondence to Satyabrata Mohapatra.

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Sahu, K., Singh, J. & Mohapatra, S. Photocatalytic and catalytic removal of toxic pollutants from water using CuO nanosheets. J Mater Sci: Mater Electron 30, 6088–6099 (2019). https://doi.org/10.1007/s10854-019-00910-3

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