STUDY OF ANTIBACTERIAL PROPERTIES OF A TiO2-SiO2-Ag COMPOSITE FILTER ON A GLASS FABRIC BASE

Abstract

Composite films based on catalytically active forms of titanium dioxide synthesized on the fibrous structure of glass fabric are a promising solution for the creation of antibacterial filters for photocatalytic oxidation of microorganism cells under the influence of light radiation of the visible region of the spectrum. The filter obtained in the present work is a multilayer TiO2-SiO2-Ag composite film bonded to fibres of glass fibre carrier. This material has photocatalytic activity due to the presence of titanium dioxide in the anatase phase, which under the influence of light radiation is able to decompose organic compounds and microorganisms sorbed on the filter surface. Special attention was paid to thermal analysis, as a result of which the optimal mode of step-by-step heat treatment of materials was determined to obtain the required phase composition. The selected heat treatment regime allowed to increase the crystallinity of the anatase phase of TiO2, which significantly affected its optical characteristics such as refractive index and forbidden band width energy. The antimicrobial effect of TiO2-SiO2-Ag/glass material tested as a filter in the air purification process was demonstrated in this work. After applying this material as a filter, it was possible significantly reduce the number of E. coli colonies detected in the filter washes, reaching a level of 125 CFU m-3. This indicates the high oxidative capacity of the filter in relation to microorganisms and confirms its potential for use in the field of photocatalytic air purification. The authors note the possibility of application of the developed material in the field of water purification and surface treatment, which determines the prospects for further research. For citation: Buzaev A.A., Tkachuk V.A., Lyutova E.S., Borilo L.P. Study of antibacterial properties of A TiO2-SiO2-Ag composite filter on a glass fabric base. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2024. V. 67. N 7. P. 63-71. DOI: 10.6060/ivkkt.20246707.7001.