Abstract
Photocatalytically active materials based on titania modified with tungsten (5–30 wt %) have been synthesized. Specific features of the formation of these materials and their physicochemical and photocatalytic properties have been described. It has been found that the modification of titania with tungsten provides the formation of nanodispersed powders (7.2–96.7 nm) with a free specific surface area of 6.4–215 m2/g. Using the example of gram-negative bacteria Pseudomonas fluorescens, it has been shown that photocatalysts based on titania modified with tungsten (10–30 wt %) and calcined at 600°C are highly efficient for the photocatalytic inactivation of the microbiota. The highest photocatalytic antibacterial activity has been exhibited by the 600-W-20 sample. Most of the bacteria are inactivated under irradiation with visible light of natural origin at an illuminance (E) of 14 500 lx during the first 20–45 min. Upon the introduction of unmodified titania, the 600-W-5 sample, and a commercial P-25 photocatalyst from Degussa as a photocatalyst, no inhibition of bacterial growth has been detected.
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Translated by M. Timoshinina
Abbreviations and notation: PC, photocatalyst; UV, ultraviolet; PCA, photocatalytic activity; AA, antibacterial activity; XRD, X-ray diffraction analysis.
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Belikov, M.L., Fokina, N.V., Redkina, V.V. et al. Photocatalytic Inactivation of Bacteria in the Presence of Tungsten-Modified Titania under Visible Light Irradiation. Kinet Catal 63, 364–376 (2022). https://doi.org/10.1134/S0023158422040036
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DOI: https://doi.org/10.1134/S0023158422040036