Antimicrobial Effect of Submicron Complex Oxide Particles CsTeMoO₆ under Visible Light

Abstract

The antimicrobial activity of submicron particles of new photocatalytic active complex metal oxide CsTeMoO6 against bacteria Escherichia coli and Staphylococcus aureus and fungi Aspergillus niger and Penicillium chrysogenum (spores and vegetative mycelium) was studied. It has been established that CsTeMoO6 has the antimicrobial activity in both under dark and visible light conditions in relation to all test cultures of microorganisms. The most inhibitory effect of CsTeMoO6 was noted for E. coli. The light enhanced the antimicrobial effect of the test compound against all cultures of bacteria and fungi, which is associated with the presence of photocatalytic activity of CsTeMoO6. The antifungal activity of CsTeMoO6 increased against spores and vegetative mycelium of fungi under light condition, and this effect increased with an increasing duration of time exposure. The different degree of survival rate of the studied microorganisms in the presence of this compound (under both dark and light) may be associated with the physiological and biochemical characteristics of the used microorganisms, including different mechanisms of resistance against complex metal oxide and reactive oxygen species.

Keywords

• complex metal oxide
• antimicrobial properties
• submicron particles
• reactive oxygen species
• photocatalysis