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ISSN: 1023-5086

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ISSN: 1023-5086

Scientific and technical

Opticheskii Zhurnal

A full-text English translation of the journal is published by Optica Publishing Group under the title “Journal of Optical Technology”

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DOI: 10.17586/1023-5086-2026-93-06-87-95

УДК: 10.17586/1023-5086-2026-93-06-87-95

Investigation of the photocatalytic properties of titanium oxide films induced by nanosecond laser pulses

Afanasiev N.A., Karlagina Y.Y., Khmelevsky V.A., Gulinyan V.A., Shelemanov A.A., Evstropiev, S.K., Fominov D.E., Romanova G.V.
For Russian citation (Opticheskii Zhurnal):

Афанасьев Н.А., Карлагина Ю.Ю., Хмелевский В.А., Гулинян В.А., Шелеманов А.А., Евстропьев С.К., Фоминов Д.Э., Романова Г.В. Исследование фотокаталитических свойств титановых оксидных плёнок, сформированных лазерными импульсами наносекундной длительности // Оптический журнал. 2026. Т. 93. № 6. С. 87–95. http://doi.org/10.17586/1023-5086-2026-93-06-87-95

Afanasyev N.A., Karlagina Yu.Yu., Khmelevsky V.A., Gulinian V.A., Shelemanov A.A., Evstropev S.K., Fominov D.E., Romanova G.V. Investigation of the photocatalytic properties of titanium oxide films induced by nanosecond laser pulses [in Russian] // Opticheskii Zhurnal. 2026. V. 93. № 6. P. 87–95. http://doi.org/10.17586/1023-5086-2026-93-06-87-95

For citation (Journal of Optical Technology):
-
Abstract:

Scope of research. Photocatalytic properties of titanium oxide films formed by nanosecond laser irradiation with variable irradiation dose. The purpose of the work is to experimentally determine the effect of irradiation dose on the morphology, elemental composition, and phase composition of the films to control their photocatalytic activity and develop efficient coatings for medical (disinfection) and environmental applications. Method. Pulsed laser oxidation of VT1-0 titanium alloy followed by optical and electron microscopy, profilometry, energy-dispersive X-ray spectroscopy, and Raman spectroscopy. Photocatalytic activity was evaluated via singlet oxygen generation and methylene blue degradation. Main results. A nonlinear dependence of phase composition on irradiation dose was established: rutile forms at low (1.6–1.7×1023 photon/cm2) and high (5.7–8.5×1023 photon/cm2) doses, anatase at 4.3×1023 photon/cm2, and a mixed phase at 1.9–3.4×1023 photon/cm2. Rutile-dominated coatings show enhanced photocatalytic activity, whereas mixed phases exhibit charge-carrier recombination. Structural-functional correlation was identified: increased surface roughness, larger surface area, and moderate nitrogen doping enhance photocatalysis. The optimal regime (20 W, 999 kHz, 100 ns, 10 passes, 100 mm/s) combined with 385-nm UV irradiation provides maximum reaction yield. Practical significance. A laser-based approach enabling photocatalytic coatings with controllable properties.

Keywords:

titanium, oxide films, laser processing, photocatalysis, roughness, singlet oxygen

Acknowledgements:

the structural analysis (Fig. 2) was carried out at the IRC for Nanotechnology of Saint Petersburg State University Research Park, Russia, within Project № АААА-A19-119091190094.

OCIS codes: 140.3510, 140.3550, 230.3670, 300.6540

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