Izvestiya of Saratov University.

Chemistry. Biology. Ecology

ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)
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Language: 
Russian
Heading: 
Biology
Article type: 
Article
UDC: 
577.344.3.579.61.666.1.056
DOI: 
10.18500/1816-9775-2021-21-2-185-189
EDN: 
VZJUWE

Photocatalytic effect of led radiation (405 nm) and new Al2O3 3D-nanocomposites on the growth of Staphylococcus aureus

Autors: 
Svetlakova Anna V., Saratov State University
Tuchina Elena S., Saratov State University
Abstract: 

The progressive growth of bacterial resistance to antibiotic drugs requires the creation of highly efficient nanomaterials. Aluminum oxide is a stable non-toxic semiconductor material; however, the photocatalytic properties of its modifications in relation to microorganisms are not well understood. In this study, we used new 3D composites of aluminum oxyhydroxide (Al2O3 ? nH2O) in three modifications (?, ? and ?), which are a mesh of 150 nm nanofibrils. The assessment of the photocatalytic antibacterial properties of the composites was carried out on the museum strain S. aureus 209 P. It was shown that, in combination with violet LED radiation (405 nm, 17 mW/cm2 ), the composites under study significantly suppress bacterial growth (from 65 to 89%), with the sample containing ?-Al2O3 showing the best result.

Key words: 
photocatalytic effect
nanocoatings
nanoparticles
nanocomposites
Al2O3
violet light
405 nm
microorganisms
Staphylococcus aureus
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Received: 
26.01.2021
Accepted: 
10.02.2021
Published: 
30.06.2021