Photoinduced Dynamics of Spin Centers in Carbon-Modified Titanium Dioxide Nanotubes

E. V. Kytina; Кытина Е. В.; T. P. Savchuk; Савчук Т. П.; I. M. Gavrilin; Гаврилин И. М.; E. A. Konstantinova; Константинова Е. А.

doi:10.31857/S0044457X22601201

Photoinduced Dynamics of Spin Centers in Carbon-Modified Titanium Dioxide Nanotubes

Authors: Kytina E.V.¹, Savchuk T.P.¹^,2, Gavrilin I.M.², Konstantinova E.A.¹
Affiliations:
1. Moscow State University
2. National Research University of Electronic Technology
Issue: Vol 68, No 3 (2023)
Pages: 419-425
Section: НЕОРГАНИЧЕСКИЕ МАТЕРИАЛЫ И НАНОМАТЕРИАЛЫ
URL: https://journals.rcsi.science/0044-457X/article/view/136347
DOI: https://doi.org/10.31857/S0044457X22601201
EDN: https://elibrary.ru/JBOVJY
ID: 136347

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Abstract
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Abstract

Arrays of titanium dioxide (TiO2) nanotubes with different chemical compositions have been synthesized; their structural properties have been studied, and the characteristics of spin centers (defects) have been determined. All samples have appeared to contain carbon. It has been established that the main type of spin centers in TiO2 nanotubes are dangling carbon bonds, and their concentration correlates with the carbon content in the obtained structures. Under illumination, a reversible increase in the concentration of defects occurs, which is caused by their photoinduced recharging in the process of impurity absorption. This process is accompanied by an increase in the concentration of photoexcited electrons in the conduction band. The originality and novelty of the work are determined by the development of a method for controlling the density of defects and, accordingly, the concentration of photoinduced electrons by thermal treatment of samples under various conditions. The results open up new possibilities for the development of photocatalysts based on titanium dioxide nanotubes with a controlled electron concentration in the conduction band that function in the visible range of the spectrum.

Keywords

TiO2 nanotubes, EPR spectroscopy, spin centers, defects, photoinduced electrons

References

Dongmei He, Liyong Du, Keyan Wang et al. // Russ. J. Inorg. Chem. 2021. V. 66. P. 1986. https://doi.org/10.1134/S0036023621130040
Sadovnikov A.A., Nechaev E.G., Bel’tyukov A.N. et al. // Russ. J. Inorg. Chem. 2021. V. 66. P. 460. https://doi.org/10.1134/S0036023621040197
Dolganov A.V., Balandina A.V., Chugunov D.B. et al. // Russ. J. Gen. Chem. 2020. V. 90. P. 1229. https://doi.org/10.1134/S1070363220070099
Jenny Schneider, Masaya Matsuoka, Masato Takeuchi et al. // Chem. Rev. 2014. V. 114. P. 9919. https://doi.org/10.1021/cr5001892
Jingxiang Low, Jiaguo Yu, Mietek Jaroniec et al. // Adv. Mater. 2017. V. 29. № 20. P. 1601694. https://doi.org/10.1002/adma.201601694
Martin Motola, Hanna Sopha, Miloš Krbal et al. // Electrochem. Commun. 2018. V. 97. № 1. P. 1. https://doi.org/10.1016/j.elecom.2018.09.015
Кривобок В.С. // Письма в ЖЭТФ. 2020. Т. 112. № 8. С. 501. https://doi.org/10.31857/S1234567820200033
Zubair M., Kim H., Razzaq A. et al. // J. CO2 Utiliz. 2018. V. 26. P. 70. https://doi.org/10.1016/j.jcou.2018.04.004
Jaafar H., Ahmad Z.A., Ain M.F. et al. // Optik. 2017. V. 144. P. 91. https://doi.org/10.1016/j.ijleo.2017.06.097
Zhao W., Liu S., Zhang S. et al. // Catal. Today. 2019. V. 337. P. 37. https://doi.org/10.1016/j.cattod.2019.04.024
Tang T., Yin Z., Chen J. et al. // Chem. Eng. J. 2021. V. 417. P. 128058. https://doi.org/10.1016/j.cej.2020.128058
Константинова Е.А., Миннеханов А.А., Кытина Е.В., Трусов Г.В. // Письма в ЖЭТФ. 2020. Т. 112. № 8. С. 562. https://doi.org/10.1134/S0021364020200060
Wei Y., Huang Y., Fang Y. et al. // Mater. Res. Bull. 2019. V. 119. P. 110571. https://doi.org/10.1016/j.materresbull.2019.110571
Xiao Y., Sun X., Li L. et al. // Chin. J. Catal. 2019. V. 40. № 5. P. 765. https://doi.org/10.1016/s1872-2067(19)63286-9
So S., Riboni F., Hwang I. et al. // Electrochim. Acta. 2017. V. 231. P. 721. https://doi.org/10.1016/j.electacta.2017.02.094
Motola M., Čaplovičová M., Krbal M. et al. // Electrochim. Acta. 2020. V. 331. P. 135374. https://doi.org/10.1016/j.electacta.2019.135374
Kar P., Zeng S., Zhang Y. et al. // Appl. Catal. B: Environmental. 2019. V. 243. P. 522. https://doi.org/10.1016/j.apcatb.2018.08.002
Savchuk T., Gavrilin I., Konstantinova E. et al. // Nanotechnology. 2021. V. 33. P. 055706. https://doi.org/10.1088/1361-6528/ac317e
Gavrilin I., Dronov A., Volkov R. et al. // Appl. Surf. Sci. 2020. V. 516. P. 146120. https://doi.org/10.1016/j.apsusc.2020.146120
Hu L., Huo K., Chen R. et al. // Anal. Chem. 2021. V. 83. P. 8138. https://doi.org/10.1021/ac201639m
Zhi-Da Gao, Xu Zhu, Ya-Hang Li et al. // Chem. Commun. 2015. V. 51. P. 7614. https://doi.org/10.1039/c5cc00728c
Yan-Yan Song, Ya-Hang Li, Jing Guo et al. // J. Mater. Chem. A. 2015. V. 3. P. 23754. https://doi.org/10.1039/c5ta05691h
Zhao H., Pan F., Li Y. et al. // J. Materiomics. 2017. V. 3. P. 17. https://doi.org/10.1016/j.jmat.2016.12.001
Wedland W., Hecht H. Reflectance Spectroscopy. N.Y.: Interscience, 1966.
Minnekhanov A.A., Deygen D.M., Konstantinova E.A. et al. // Nanoscale Res. Lett. 2012. V. 7. P. 333. https://doi.org/10.1186/1556-276X-7-333