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Photocatalytic Composite Nanomaterial and Engineering Solution for Inactivation of Airborne Bacteria

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Abstract

In this study we propose a new composite material with an enhanced bactericidal action that utilises the complex interactions with bacteria: mechanical interactions of the bacteria with ZnO tetrapod spikes, a photocatalytic process on ZnO nanoparticles, and disinfection by Ag nanoparticles. ZnO and Ag nanoparticles were immobilised on a single-crystalline ZnO tetrapod by the ultrasonic mixing method. The XRD, TEM, SEM and EDS analyses showed the tetrapod-like crystals covered by ZnO and Ag nanoparticles. This complex photocatalytic material, deposited on a grid support, was tested in the UV purifier air system in the AR Diagnostic company. The active microbial monitoring of the indoor air showed a decrease in the concentration of bacteria in the air of the meeting room, with the door open, at 90% for a duration of 30–40 min. A simple variant of the design of an air purifier system, which can be mounted in different types of air channels and compartments, is proposed.

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Acknowledgements

The authors are thankful the H2020-MSCA-RISE-2015 Programme, project N 690968 NANOGUARD2AR for support of this work. The authors are also thankful to A. Chauvin for colonies counting.

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Authors and Affiliations

  1. Donetsk Institute for Physics and Engineering named after O.O. Galkin NAS of Ukraine, Kiev, 03028, Ukraine

    Igor Danilenko, Oksana Gorban, Leonid Akhkozov & Tetyana Konstantinova

  2. AR Diagnostic, Centro de Empresas da Universidade Do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal

    Paulo Miguel da Costa Zaragoza de Oliveira Pedro

  3. Laboratorio Nacional de Engenharia Civil, 1700 066, Lisboa, Portugal

    Joao Viegas

  4. REQUIMTE, Assotiated Laboratory of Green Chemistry, University Nova de Lissboa, Caparica, Portugal

    Olesya Shapovalova

  5. NOVA ID FCT, Campus de Caparica, 2829-516, Caparica, Portugal

    Svitlana Lyubchyk

Authors
  1. Igor Danilenko
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  2. Oksana Gorban
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  3. Paulo Miguel da Costa Zaragoza de Oliveira Pedro
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  4. Joao Viegas
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  5. Olesya Shapovalova
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  6. Leonid Akhkozov
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  7. Tetyana Konstantinova
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  8. Svitlana Lyubchyk
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Correspondence to Igor Danilenko.

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Danilenko, I., Gorban, O., da Costa Zaragoza de Oliveira Pedro, P.M. et al. Photocatalytic Composite Nanomaterial and Engineering Solution for Inactivation of Airborne Bacteria. Top Catal 64, 772–779 (2021). https://doi.org/10.1007/s11244-020-01291-2

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  • DOI: https://doi.org/10.1007/s11244-020-01291-2

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