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Photoaccumulating TiO2–MoO3, TiO2–V2O5, and TiO2–WO3 Heterostructures for Self-Sterilizing Systems with the Prolonged Bactericidal Activity

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Abstract

The photocatalytic coatings based on the solvothermally-derived submicron particles of layered MoO3, V2O5, and WO3 with the islet TiO2 shell demonstrate excellent photoenergy storage ability accumulating the photoproduced charge, as evidenced by EPR measurements, via generation of hydrogen bronzes and Ti3+ states, which exhibit gradual oxidation in air conditions yielding peroxide. This continuous production of long-lived oxidation agent imparts bactericidal activity to the pre-exposed photocatalysts which retains for unprecedentedly long time (depending on the photocatalyst, the survival ratio below 0.5 is observed for E. coli bacteria for 10–12 h after exposure).

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Acknowledgements

T.V.S and D.V.S acknowledge the support from the Belarusian Republican Foundation for Fundamental Research (Grant Kh18R-075). A.I.K. and E.A.K. are thankful for the financial support to the Russian Foundation for Basic Research (Grant No. 18-53-00020).

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Authors and Affiliations

  1. Belarusian State University, Nazavisimosti 4, 220030, Minsk, Belarus

    T. V. Sviridova, L. Yu. Sadovskaуa & D. V. Sviridov

  2. Faculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow, Russian Federation, 119991

    E. A. Konstantinova

  3. National Research Center Kurchatov Institute, Akademika Kurchatova 1, Moscow, Russian Federation, 123182

    E. A. Konstantinova

  4. Belarusian State Technology University, Sverdlova Str 13a, 220006, Minsk, Belarus

    N. A. Belyasova

  5. N.Semenov Institute of Chemical Physics, RAS, Moscow, Russian Federation, 119991

    A. I. Kokorin

  6. Plekhanov Russian University of Economics, Moscow, Russian Federation, 115093

    A. I. Kokorin

Authors
  1. T. V. Sviridova
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  2. L. Yu. Sadovskaуa
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  3. E. A. Konstantinova
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  4. N. A. Belyasova
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  5. A. I. Kokorin
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  6. D. V. Sviridov
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Correspondence to D. V. Sviridov.

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Sviridova, T.V., Sadovskaуa, L.Y., Konstantinova, E.A. et al. Photoaccumulating TiO2–MoO3, TiO2–V2O5, and TiO2–WO3 Heterostructures for Self-Sterilizing Systems with the Prolonged Bactericidal Activity. Catal Lett 149, 1147–1153 (2019). https://doi.org/10.1007/s10562-019-02706-w

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  • DOI: https://doi.org/10.1007/s10562-019-02706-w

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