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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Inorganic Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Inorganic Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал неорганической химии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0044-457X</issn><issn publication-format="electronic">3034-560X</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">665296</article-id><article-id pub-id-type="doi">10.31857/S0044457X22601201</article-id><article-id pub-id-type="edn">JBOVJY</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>НЕОРГАНИЧЕСКИЕ МАТЕРИАЛЫ И НАНОМАТЕРИАЛЫ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Unknown</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Photoinduced Dynamics of Spin Centers in Carbon-Modified Titanium Dioxide Nanotubes</article-title><trans-title-group xml:lang="ru"><trans-title>Фотоиндуцированная динамика спиновых центров в нанотрубках диоксида титана, модифицированных углеродом</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kytina</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Кытина</surname><given-names>Е. В.</given-names></name></name-alternatives><email>wewillbe01@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Savchuk</surname><given-names>T. P.</given-names></name><name xml:lang="ru"><surname>Савчук</surname><given-names>Т. П.</given-names></name></name-alternatives><email>wewillbe01@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gavrilin</surname><given-names>I. M.</given-names></name><name xml:lang="ru"><surname>Гаврилин</surname><given-names>И. М.</given-names></name></name-alternatives><email>wewillbe01@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Konstantinova</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Константинова</surname><given-names>Е. А.</given-names></name></name-alternatives><email>wewillbe01@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет им. М.В. Ломоносова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">National Research University of Electronic Technology</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский университет электронной техники – МИЭТ</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-03-01" publication-format="electronic"><day>01</day><month>03</month><year>2023</year></pub-date><volume>68</volume><issue>3</issue><fpage>419</fpage><lpage>425</lpage><history><date date-type="received" iso-8601-date="2025-02-26"><day>26</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Е.В. Кытина, Т.П. Савчук, И.М. Гаврилин, Е.А. Константинова</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Е.В. Кытина, Т.П. Савчук, И.М. Гаврилин, Е.А. Константинова</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Е.В. Кытина, Т.П. Савчук, И.М. Гаврилин, Е.А. Константинова</copyright-holder><copyright-holder xml:lang="ru">Е.В. Кытина, Т.П. Савчук, И.М. Гаврилин, Е.А. Константинова</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/0044-457X/article/view/665296">https://transsyst.ru/0044-457X/article/view/665296</self-uri><abstract xml:lang="en"><p>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.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181324715808">Синтезированы массивы нанотрубок диоксида титана (TiO<sub>2</sub>) с различным химическим составом, изучены их структурные свойства и определены характеристики спиновых центров (дефектов). Обнаружено, что все образцы имеют в своем составе углерод. Установлено, что основным типом спиновых центров в нанотрубках TiO<sub>2</sub> являются оборванные связи углерода, концентрация которых коррелирует с содержанием углерода в полученных структурах. Под действием освещения происходит обратимый рост концентрации дефектов, обусловленный их фотоиндуцированными реакциями перезарядки в процессе примесного поглощения. Указанный процесс сопровождается увеличением концентрации фотовозбужденных электронов в зоне проводимости. Оригинальность и новизна работы определяются разработкой способа контроля плотности дефектов и, соответственно, концентрации фотоиндуцированных электронов путем термической обработки образцов в различных условиях. Полученные результаты открывают новые возможности для разработки функционирующих в видимом диапазоне спектра фотокатализаторов на основе нанотрубок диоксида титана с управляемой концентрацией электронов в зоне проводимости.</p></trans-abstract><kwd-group xml:lang="en"><kwd>TiO2 nanotubes</kwd><kwd>EPR spectroscopy</kwd><kwd>spin centers</kwd><kwd>defects</kwd><kwd>photoinduced electrons</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>нанотрубки TiO<sub>2</sub></kwd><kwd>спектроскопия ЭПР</kwd><kwd>спиновые центры</kwd><kwd>дефекты</kwd><kwd>фотоиндуцированные электроны</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Dongmei He, Liyong Du, Keyan Wang et al. // Russ. J. Inorg. Chem. 2021. V. 66. P. 1986. https://doi.org/10.1134/S0036023621130040</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Sadovnikov A.A., Nechaev E.G., Bel’tyukov A.N. et al. // Russ. J. Inorg. Chem. 2021. V. 66. 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