Photocatalytic Composite Nanomaterial and Engineering Solution for Inactivation of Airborne Bacteria

Igor Danilenko, Oksana Gorban, Paulo Miguel da Costa Zaragoza de Oliveira Pedro, João Viegas, Olesya Shapovalova, Leonid Akhkozov, Tetyana Konstantinova, Svitlana Lyubchyk

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

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.

Original languageEnglish
JournalTopics in Catalysis
DOIs
Publication statusAccepted/In press - Jun 2020

Keywords

  • Air purification system
  • Airborne bacteria
  • ZnO composite photocatalyst

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