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DOI: 10.17586/1023-5086-2026-93-11-97-107
УДК: 544.526.5
ZnO:Sn,Fe-coated SMF-28 photocatalytic optical fibers for localized singlet oxygen generation
Быков Е.П., Хомутинникова Л.Л., Бабаев К.В., Москаленко И.В., Евстропьев С.К. Оптические волокна SMF-28 с фотокаталитическим покрытием ZnO:Sn,Fe для локальной генерации синглетного кислорода // Оптический журнал. 2026. Т. 93. № 11. С. 97–107. http://doi.org/10.17586/1023-5086-2026-93-11-97-107
Bykov E.P., Khomutinnikova L.L., Babaev K.V., Moskalenko I.V., Evstropiev S.K. ZnO:Sn,Fe-coated SMF-28 photocatalytic optical fibers for localized singlet oxygen generation [in Russian] // Opticheskii Zhurnal. 2026. V. 93. № 11. P. 97–107. http://doi.org/10.17586/1023-5086-2026-93-11-97-107
Subject of study. ZnO:Sn,Fe photocatalytic coatings formed on the cylindrical surface of SMF-28 single-mode silica optical fibers for localized singlet oxygen generation. Aim of study. Formation of an oxide photocatalytic layer on standard SMF-28 optical fiber and evaluation of its ability to generate singlet oxygen and perform photooxidative activity. Method. The coatings were fabricated using a polymer-salt method. The crystalline structure and morphology were studied by X-ray diffraction and scanning electron microscopy. Singlet oxygen generation was assessed by electron paramagnetic resonance using 2,2,6,6-tetramethylpiperidine as a spin-trapping agent. Photocatalytic activity was determined by the methylene blue degradation under ultraviolet irradiation. Main results. The feasibility of forming ZnO:Sn,Fe coating on standard SMF-28 single-mode optical fiber by the polymer-salt method while preserving the fiber geometry was demonstrated. A uniformly distributed layer of fine-dispersed agglomerates was formed on the fiber surface. Singlet oxygen generation was confirmed by linear accumulation of the nitroxyl radical (0.30 µM/min, irradiation wavelength 365 nm). In the methylene blue photodegradation experiments, a threefold increase in the rate constant compared with photolysis was observed (0.012 versus 0.004 1/min). Practical significance. The results demonstrate the possibility of creating photocatalytically active optical fibers for remotely controlled and spatially localized generation of singlet oxygen.
photocatalytic optical fibers, zinc oxide, singlet oxygen, photocatalysis, polymer-salt method
Acknowledgements:the research was carried out within the state assignment of Ministry of Science and Higher Education of the Russian Federation (project № FSER-2024-0006).
OCIS codes: 310.1620
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