CC BY
3Development of an activation station for irradiation of photocatalytic coatings based on titanium oxides
V. Khmelevsky1*, Yu. Karlagina1, N. Afanasyev1, E. Prokofiev1, G. Romanova1
1-ITMO University, Russia, Saint-Petersburg, Birzhevaya street 14-16
A critical task in medicine and laboratory settings is surface sterilization to prevent bacterial contamination. One of the most effective methods for combating bacterial contamination is UV sterilization, whose efficiency can be increased by using it in combination with semiconductor coatings [1,2]. This method triggers photocatalysis in the semiconductor, leading to the generation of reactive oxygen species and subsequent bacterial destruction [3,4]. This study investigates the photocatalytic activity of oxide films formed on titanium samples during laser surface oxidation, utilizing a developed activation station (AS).
Tasks performed during the work:
1. Design and assemble the activation station. This includes calculating the electrical circuit parameters and determining the overall station specifications.
2. Evaluate the stability of the AS under normal and specified operating conditions.
3. Investigate the photocatalytic activity and physicochemical properties of laser-induced oxide coatings created on the surface of titanium samples.
Brief description of the results obtained:
We developed and built an AS for irradiating laser-induced oxide coatings. We created test samples with oxide films on their surfaces using laser thermochemical processing. We investigated the photocatalytic activity of the created semiconductor coatings using the AS. We studied the relationship between the photocatalytic yield efficiency and the laser radiation dose for samples irradiated using the AS at a wavelength of 400 nm. Samples created with the highest laser irradiation dose exhibited the greatest photocatalytic activity. We investigated the surface morphology of laser-induced oxide coatings and the dependence of photocatalytic yield efficiency on the physicochemical properties of these coatings.
This research was supported by Priority 2030 Federal Academic Leadership Program.
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[2] N. Zrelovs, et al, Sorting out the superbugs: Potential of sortase A inhibitors among other antimicrobial strategies to tackle the problem of antibiotic resistance, Antibiotics. - V. 10. - №. 2. - P. 164, (2021).
[3] J. Wang, et al, Oxygen-vacancy-enhanced singlet oxygen production for selective photocatalytic oxidation, ChemSusChem. - V. 13. -№. 13. - P. 3488-3494, (2020).
[4] Y. Karlagina, et al, Laser-induced antibacterial coating on the surface of an individual titanium membrane designed by a neural network, Optical and Quantum Electronics, - V. 55. - №. 9. - P. 775, (2023).
