Izvestiya of Saratov University.

Chemistry. Biology. Ecology

ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)

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New Gypsum-Titanium Composites for Antimicrobial Photocatalytic Action on Staphylococcus aureus

Tuchina Elena S., Saratov State University
Korchenova Maria V., Saratov State University
Svetlakova Anna V., Saratov State University
Kordas Krisztian, University of Oulu
Tuchin Valeriy V., Saratov State University

The last decade has allowed the creation of new composite photocatalytic materials with a wide range of applications. Antimicrobial coatings based on photocatalytic materials are environmentally friendly and effective for use in health care, the food industry, enterprises and service facilities. This study is devoted to the study of the antibacterial activity of gypsum-titanium nanocomposites. Titanium dioxide nanowires immobilized in gypsum, doped with palladium and supplemented with nitrogen and hydrogen, when illuminated by LED sources in the UV and violet spectral regions (365, 385, 405 nm) were tested. It was shown that materials with a high content of gypsum and doped with palladium exhibit the highest antibacterial activity (up to 90–97% of the death of the microbial population) due to better absorption of light and its diffusion. The most effective was the complex action of radiation and G-Ti-Pd-7 sample containing 10 wt.% TiO2 nanowires that were doped with nitrogen and palladium.

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