Bacterial Inactivation on Concrete Plates Loaded with Modified TiO2 Photocatalysts under Visible Light Irradiation

Molecules

Magdalena Janus¹  Kamila Zając¹  Ewelina Kusiak-Nejman²  Paulina Rokicka-Konieczna²  Agata Markowska-Szczupak²  AntoniW. Morawski² 

[1] Department of Sanitary Engineering, Faculty of Civil Engineering and Architecture, West Pomeranian University of Technology, Szczecin, al. Piastów 50, 70-311 Szczecin, Poland;Institute of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, ul. Pułaskiego 10, 70-310 Szczecin, Poland;

关键词: photoactive concrete;    photocatalysis;    titanium dioxide;    modified TiO₂;    Escherichia coli inactivation;   

DOI  :  10.3390/molecules24173026

来源: DOAJ

【 摘 要 】

The antibacterial activity of concrete plates loaded with various titania photocatalysts was investigated. The target in bacteria testing was Escherichia coli K12. The presence of photocatalysts in the concrete matrix at a dose of 10 wt.% improved the antibacterial properties, which became significant depending on the type of the added photocatalyst. Total inactivation of E. coli irradiated under artificial solar light was observed on the concrete plates loaded with the following photocatalysts: TiO₂/N,C_MeOH-300, TiO₂/N,C_EtOH-100, TiO₂/N,C_isoPrOH-100 and TiO₂/N-300. The modified Hom disinfection kinetic model was found as a best-fit model for the obtained results. The presence of nitrogen and carbon in the photocatalysts structure, as well as crystallite size, surface area and porosity, contributed to the increase of antibacterial properties of concrete plates.

【 授权许可】

Unknown