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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">techusgu</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Юго-Западного государственного университета. Серия: Техника и технологии</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Southwest State University. Series: Engineering and Technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2223-1528</issn><publisher><publisher-name>Юго-Западный государственный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21869/2223-1528-2024-14-2-108-121</article-id><article-id custom-type="elpub" pub-id-type="custom">techusgu-259</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Синтез гидротермальным методом наночастиц TiO2, легированных Eu</article-title><trans-title-group xml:lang="en"><trans-title>Synthesis of Eu-doped TiO2 nanoparticles by hydrothermal method</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7085-8913</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Егельский</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Egelskii</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Илья Викторович Егельский, аспирант</p><p>Региональный центр нанотехнологий; кафедра нанотехнологий микроэлектроники, общей и прикладной физики</p><p>305040; ул. 50 лет Октября, д. 94; Курск</p></bio><bio xml:lang="en"><p>Ilia V. Egelskii, Post-Graduate Student, Engineer</p><p> Regional Center of Nanotechnology; Department of Nanotechnology, Microelectronics and Engineering Physics</p><p>305040; 50 Let Oktyabrya Str. 94; Kursk</p></bio><email xlink:type="simple">ive1996@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5004-0823</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пугачевский</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Pugachevskii</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Максим Александрович Пугачевский, доктор физико-математических наук, профессор, директор центра</p><p>Региональный центр нанотехнологий; кафедра нанотехнологий, микроэлектроники, общей и прикладнойфизики</p><p>05040; ул. 50 лет Октября, д. 94; Курск</p></bio><bio xml:lang="en"><p>Maxim A. Pugachevskii, Doctor of Sciences (Physics and Mathematics), Professor, Director of the Center</p><p>Regional Center of Nanotechnology; Department of Nanotechnology, Microelectronics and Engineering Physics</p><p>305040; 50 Let Oktyabrya Str. 94; Kursk</p></bio><email xlink:type="simple">pmaximal@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-4670-1543</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мартынова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Martynova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Екатерина Андреевна Мартынова, студент, инженер</p><p>Региональный центр нанотехнологий; кафедра нанотехнологий, микроэлектроники, общей и прикладной физики</p><p>05040; ул. 50 лет Октября, д. 94; Курск</p></bio><bio xml:lang="en"><p>Ekaterina A. Martynova, Student, Engineer</p><p>Regional Center of Nanotechnology; Department of Nanotechnology, Microelectronics and Engineering Physics</p><p>305040; 50 Let Oktyabrya Str. 94; Kursk</p></bio><email xlink:type="simple">rinaram505@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8087-874X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Неручев</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Neruchev</surname><given-names>Yu. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юрий Анатольевич Неручев, доктор физико-математических наук, профессор, научный руководитель центра</p><p>научно-исследовательский центр физики конденсированного состояния; кафедра физики и нанотехнологий</p><p>305000; ул. Радищева, д. 33; Курск</p></bio><bio xml:lang="en"><p>Yurii A. Neruchev, Doctor of Sciences (Physics and Mathematics), Professor</p><p>Scientific Supervisor of the Research Center for Condensed Matter Physics; Department of Physics and Nanotechnology</p><p>305000; 33 Radishcheva Str.; Kursk</p></bio><email xlink:type="simple">yuan2003@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Юго-Западный государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Southwest State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Курский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kursk State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>01</day><month>07</month><year>2024</year></pub-date><volume>14</volume><issue>2</issue><fpage>108</fpage><lpage>121</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Егельский И.В., Пугачевский М.А., Мартынова Е.А., Неручев Ю.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Егельский И.В., Пугачевский М.А., Мартынова Е.А., Неручев Ю.А.</copyright-holder><copyright-holder xml:lang="en">Egelskii I.V., Pugachevskii M.A., Martynova E.A., Neruchev Y.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://techusgu.elpub.ru/jour/article/view/259">https://techusgu.elpub.ru/jour/article/view/259</self-uri><abstract><sec><title>   Цель исследования</title><p>   Цель исследования. Получение, характеризация и сравнение фотокаталитических свойств наночастиц диоксида титана, легированных европием.</p></sec><sec><title>   Методы</title><p>   Методы. Путем гидротермального синтеза с постобработкой в виде промывания и отжига были получены наночастицы диоксида титана, легированные европием. Характеризация выполнена с помощью просвечивающей электронной микроскопии, рентгенофазового анализа, энергодисперсионного анализа. Ширина запрещенной зоны наночастиц была определена методом спектроскопии диффузного отражения. Свойства фотолюминесценции были изучены сканирующей зондовой микроскопией и спектроскопией комбинационного рассеяния. Фотокаталитические свойства изучены спектрофотометрией при деградации метиленового синего под воздействием ультрафиолетового излучения.</p></sec><sec><title>   Результаты</title><p>   Результаты. Методом просвечивающей электронной микроскопии были определены средние размеры частиц диоксида титана, легированные европием. Методом ренгтенофазового анализа установлена анатазная модификация частиц независимо от процентного содержания европия. Энергодисперсионный анализ подтвердил наличие допанта в образцах. Выявлялась сильная фотолюминесценция. Пик интенсивности фотолюминесценции увеличивался пропорционально с ростом процентного содержания европия. Фотокаталитические свойства сильнее всего проявлялись при наименьшем содержании европия среди исследуемых образцов.</p></sec><sec><title>   Вывод</title><p>   Вывод. Синтезированные наночастицы диоксида титана, легированные европием, обладают анатазной модификацией, проявляя сильную фотолюминесцентную активность. Интенсивность люминесценции зависит от концентрации европия в частицах благодаря образованию дополнительных энергетических уровней внутри запрещенной зоны. Фотокаталитические свойства легированных европием наночастиц значительно улучшаются в сравнении с образцами, синтезированными без примесей. Однако концентрация европия свыше 0,5 % приводит к росту структурных дефектов, снижающих подвижность фотогенерированных носителей заряда, и создает высокий энергетический барьер, препятствующий их выходу на поверхность.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>   Purpose of research</title><p>   Purpose of research. Synthesis, characterization and comparison of the photocatalytic properties of europium-doped titanium dioxide nanoparticles.</p></sec><sec><title>   Methods</title><p>   Methods. Europium-doped titanium dioxide nanoparticles were synthesized via a hydrothermal method followed by post-treatment processes including washing and annealing. Characterization was conducted using transmission electron microscopy, X-ray phase analysis, and energy-dispersive analysis. The bandgap width of the nanoparticles was determined through diffuse reflectance spectroscopy. Photoluminescence properties were studied using scanning probe microscopy and Raman spectroscopy. The photocatalytic properties were studied by spectrophotometry to determine the degradation of methylene blue under ultraviolet radiation.</p></sec><sec><title>   Results</title><p>   Results. Transmission electron microscopy identified the average particle sizes of europium-doped titanium dioxide. Using X-ray phase analysis, it was established that the nanoparticles were in the anatase phase regardless of the europium content percentage. Energy-dispersive spectroscopy confirmed the presence of the dopant in the samples. The photoluminescence intensity peak increased proportionally with the increase in europium content percentage. The strongest photocatalytic properties were exhibited at the lowest europium content among the samples studied.</p></sec><sec><title>   Conclusion</title><p>   Conclusion. Synthesized and processed europium-doped titanium dioxide nanoparticles with anatase polymorphic modification exhibit photoluminescent properties. The luminescence intensity depends on the concentration of europium in the particles, due to the formation of additional energy levels inside the band gap. The photocatalytic properties of europium-doped nanoparticles are significantly improved in comparison with samples synthesized without impurities. However, a europium concentration above 0,5% leads to the growth of structural defects that reduce the mobility of photogenerated charge carriers and creates a high energy barrier that prevents them from reaching the surface.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>наночастицы диоксид титана</kwd><kwd>легирование европием</kwd><kwd>гидротермальный метод</kwd><kwd>фотолюминесценция</kwd><kwd>фотокаталитические свойства</kwd></kwd-group><kwd-group xml:lang="en"><kwd>titanium dioxide nanoparticles</kwd><kwd>europium doping</kwd><kwd>hydrothermal method</kwd><kwd>photoluminescence</kwd><kwd>photocatalytic properties</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при поддержке Российской академии наук и Министерства образования и науки Курской области (Соглашения № 23-29-10198, № 173)</funding-statement><funding-statement xml:lang="en">This work was supported by the Russian Academy of Sciences and the Ministry of Education and Science of the Kursk region (Agreements No. 23-29-10198, No. 173)</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Photocatalytic degradation of dyes using semiconductor photocatalysts to clean industrial water pollution / A. Rafiq, M. Ikram, S. Ali, F. Niar, M. Khan, Q. Khan // J. Ind. Eng. Chem. 2021. Vol. 97. P. 111–128. doi: 10.1016/j.jiec.2021.02.017</mixed-citation><mixed-citation xml:lang="en">Rafiq A., Ikram M., Ali S., Niaz F., Khan M., Khan Q. Photocatalytic degradation of dyes using semiconductor photocatalysts to clean industrial water pollution. J. Ind. Eng. Chem. 2021;97:111–128. doi: 10.1016/j.jiec.2021.02.017</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Analysis of photocatalytic properties of titanium dioxide electrode supported by hydroxyapatite co-catalyst in a marine solar cell / H. Wunn, S. Motoda, M. Morita, H. Itakura // ECS Meet. Abstr. 2023. Vol. MA2023-02, no. 47. P. 2278–2278. doi: 10.1149/MA2023-02472278mtgabs</mixed-citation><mixed-citation xml:lang="en">Wunn H., Motoda S., Morita M., Itakura H. Analysis of Photocatalytic properties of titanium dioxide electrode supported by hydroxyapatite Co-catalyst in a marine solar cell. ECS Meet Abstr. 2023;2(47):2278–2278. doi: 10.1149/MA2023-02472278mtgabs</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Catalyzing artificial photosynthesis with TiO&lt;sub&gt;2&lt;/sub&gt; heterostructures and hybrids: emerging trends in a classical yet contemporary photocatalyst / X. Ruan, S. Li, C. Huang, W. Zheng, X. Cui, S. K. Ravi // Adv. Mater. 2023. Vol. 36, no. 17. doi: 10.1002/adma.202305285</mixed-citation><mixed-citation xml:lang="en">Ruan X., Li S., Huang C., Zheng W., Cui X., Ravi S.K. Catalyzing Artificial photosynthesis with TiO&lt;sub&gt;2&lt;/sub&gt; heterostructures and hybrids: emerging trends in a classical yet contemporary photocatalyst. Adv. Mater. 2024:36(17): 2305285. doi: 10.1002/adma.202305285</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Ремпель А. А., Валеева А. А. Наноструктурированный диоксид титана для медицинской химии // Известия Российской академии наук. Серия химическая. 2019. № 12. С. 2163–2171.</mixed-citation><mixed-citation xml:lang="en">Rempel' A.A., Valeeva A.A. Nanostructured titanium dioxide for medicinal chemistry. Russian Chemical Bulletin. 2019;(12):2163–2171. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Titanium dioxide and its applications in mechanical, electrical, optical, and biomedical fields / Das Rajib, V. Ambardekar, P. P. Bandyopadhyay // Titanium Dioxide Advances and Applications / ed. by Hafiz Muhammed Ali. 2021. Vol. 7. doi: 10.5772/intechopen.98805</mixed-citation><mixed-citation xml:lang="en">Das Rajib Ambardekar V., Bandyopadhyay P.P. Titanium dioxide and its applications in mechanical, electrical, optical, and biomedical fields. In: Hafiz M.A. (ed.). Titanium Dioxide Advances and Applications. 2021;7. doi: 10.5772/intechopen.98805</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Synthesis and characterization of TiO&lt;sub&gt;2&lt;/sub&gt; via sol-gel method for efficient photocatalytic degradation of antibiotic ofloxacin / K. Mushtaq, M. Saeed, W. Gul, M. Munir, A. Firdous, T. Yousaf // Inorg. Nano-Metal Chem. 2020. Vol. 50, no. 7. P. 580–586. doi: 10.1080/24701556.2020.1722695</mixed-citation><mixed-citation xml:lang="en">Mushtaq K., Saeed M., Gul W., Munir M., Firdous A., Yousaf T. Synthesis and characterization of TiO&lt;/sub&gt; via sol-gel method for efficient photocatalytic degradation of antibiotic ofloxacin. Inorg. Nano-Metal. Chem. 2020;50(7): 580–586. doi: 10.1080/24701556.2020.1722695</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Direct synthesis of natural dye mixed titanium dioxide nano particles by sol-gel method for dye sensitized solar cell applications / S. Ananth, T. Arumanayagam, P. Vivek, P. Murugakoothan // Optik (Stuttg). 2014. Vol. 125, no. 1. P. 495–498. doi: 10.1016/j.ijleo.2013.07.018</mixed-citation><mixed-citation xml:lang="en">Ananth S., Arumanayagam T., Vivek P., Murugakoothan P. Direct synthesis of natural dye mixed titanium dioxide nano particles by sol-gel method for dye sensitized solar cell applications. Optik (Stuttg). 2014;125(1):495–498. doi: 10.1016/j.ijleo.2013.07.018</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Synthesis and characterization of titanium dioxide nanoparticles by chemical and green methods and their antifungal activities against wheat rust / M. A. Irshad, R. Nawaz, M. Zia ur Rehman, M. Imran, J. Ahmad, S. Ahmad [et al.] // Chemosphere. 2020. Vol. 258. P. 127352. doi: 10.1016/j.chemosphere.2020.127352</mixed-citation><mixed-citation xml:lang="en">Irshad M.A., Nawaz R., Zia ur Rehman M., Imran M., Ahmad J., Ahmad S., et al. Synthesis and characterization of titanium dioxide nanoparticles by chemical and green methods and their anti-fungal activities against wheat rust. Chemosphere. 2020;258:127352. doi: 10.1016/j.chemosphere.2020.127352</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Štengl V., Grygar T. M. The simplest way to Iodine-doped anatase for photocatalysts activated by visible light // Int. J. Photoenergy. 2011. Vol. 2011. P. 1–13. doi: 10.1155/2011/685935</mixed-citation><mixed-citation xml:lang="en">Štengl V., Grygar T.M. The simplest way to iodine-doped anatase for photocatalysts activated by visible light. Int J. Photoenergy. 2011;2011:1–13. doi: 10.1155/2011/685935</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Evaluation of sol-gel and solvothermal method on titanium dioxide and reduced graphene oxide nanocomposite / I. V. Ayala, E. Mejía-Ospino, C. Gonzalez-Arias, R. Cabanzo-Hernández, E. D. V-Niño // J. Phys. Conf. Ser. 2024. Vol. 2726, no. 1. P. 012003. doi: 10.1088/1742-6596/2726/1/012003</mixed-citation><mixed-citation xml:lang="en">Ayala I.V., Mejía-Ospino E., Gonzalez-Arias C., Cabanzo-Hernández R., V-Niño E.D. Evaluation of sol-gel and solvothermal method on titanium dioxide and reduced graphene oxide nanocomposite. J. Phys. Conf. Ser. 2024;2726(1):012003. doi: 10.1088/1742-6596/2726/1/012003</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Hydrothermal synthesis of copper-decorated titanium dioxide spherulites and their photocatalytic activity against reactive dyes / G. K. Sendil, E. Soundarrajan, M. R. Ranjitha, R. A. Klaivani, S. Raghu // Asian J. Chem. 2023. Vol. 35, no. 1. P. 45–51. doi: 10.14233/ajchem.2023.24013</mixed-citation><mixed-citation xml:lang="en">Sendil G.K., Soundarrajan E., Ranjitha M.R., Klaivani R.A., Raghu S. Hydrothermal synthesis of copper-decorated titanium dioxide spherulites and their photocatalytic activity against reactive dyes. Asian J. Chem. 2023;35(1):45–51. doi: 10.14233/ajchem.2023.24013</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Morphology, size control, and photocatalytic activities of titanium dioxide nanoparticles synthetized by microemulsion method / F. Bakhtiari, N. Foruhar, A. Zelati, M. Amouamouha // AIP Adv. 2023. Vol. 13, no. 8. doi: 10.1063/5.0156485</mixed-citation><mixed-citation xml:lang="en">Bakhtiari F., Foruhar N., Zelati A., Amouamouha M. Morphology, size control, and photocatalytic activities of titanium dioxide nanoparticles synthetized by microemulsion method. AIP Adv. 2023;13(8):085124. doi: 10.1063/5.0156485</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Bulut B., Duman Ş. Effects of calcination temperature on hydrothermally synthesized titanium dioxide submicron powders // Konya J. Eng. Sci. 2021. Vol. 9, no. 3. P. 676–685. doi: 10.36306/konjes.915062</mixed-citation><mixed-citation xml:lang="en">Bulut B., Duman Ş. Effects of calcination temperature on hydrothermally synthesized titanium dioxide submicron powders. Konya J. Eng. Sci. 2021;9(3):676-685. doi: 10.36306/konjes.915062</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Charge carrier trapping, recombination and transfer during TiO&lt;sub&gt;2&lt;/sub&gt; photocatalysis : An overview / R. Qian, H. Zong, J. Schneider, G. Zhou, T. Zhao, Y. Li // Catalysis Today. 2019. Vol. 335. P. 78–90. doi: 10.1016/j.cattod.2018.10.053</mixed-citation><mixed-citation xml:lang="en">Qian R., Zong H., Schneider J., Zhou G., Zhao T., Li Y. Charge carrier trapping, recombination and transfer during TiO&lt;sub&gt;2&lt;/sub&gt; photocatalysis : An overview. Catalysis Today. 2019;335:78–90. doi: 10.1016/j.cattod.2018.10.053</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Ðorđević V., Milićević B., Dramićanin M. D. Rare earth-doped anatase TiO&lt;sub&gt;2&lt;/sub&gt; nanoparticles // Titanium Dioxide / ed. by V. Janus. InTech, 2017. P. 25–60. doi: 10.5772/intechopen.68882.</mixed-citation><mixed-citation xml:lang="en">Ðorđević V., Milićević B., Dramićanin M.D. Rare earth-doped anatase TiO&lt;sub&gt;2&lt;/sub&gt; nanoparticles. In: Janus V. (ed.) Titanium Dioxide. InTech.; 2017. P. 25–60. doi: 10.5772/intechopen.68882</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Co-doping effect of carbon and yttrium on photocatalytic activity of TiO&lt;sub&gt;2&lt;/sub&gt; nanoparticles for methyl orange degradation / N. R. Khalid, E. Ahmed, A. Rasheed, M. Ahmad, R. Khawar, A. Shakoor // J. Ovonic Res. 2015. Vol. 11, no. 3. P. 107–112.</mixed-citation><mixed-citation xml:lang="en">Khalid N.R., Ahmed E., Rasheed A, Ahmad M., Khawar R., Shakoor A. Co-doping effect of carbon and yttrium on photocatalytic activity of TiO&lt;sub&gt;2&lt;/sub&gt; nanoparticles for methyl orange degradation. J. Ovonic. Res. 2015;11(3):107–112.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Rajeswari P. V., Ram S., Pradhan D. Core-shell synergy and Eu&lt;sup&gt;3+&lt;/sup&gt; doping in boosting charge transfer in Eu&lt;sup&gt;3+&lt;/sup&gt; doped TiO&lt;sub&gt;2&lt;/sub&gt;-carbon core-shell nanohybrids: Sustainable synthesis and visible light-driven photocatalysis // Appl. Surf. Sci. 2019. Vol. 492. P. 473–486. doi: 10.1016/j.apsusc.2019.06.169</mixed-citation><mixed-citation xml:lang="en">Rajeswari P.V., Ram S., Pradhan D. Core-shell synergy and Eu&lt;sub&gt;3+&lt;/sub&gt; doping in boosting charge transfer in Eu&lt;sup&gt;3+&lt;/sup&gt; doped TiO&lt;sub&gt;2&lt;/sub&gt;-carbon core-shell nanohybrids: Sustainable synthesis and visible light-driven photocatalysis. Appl. Surf. Sci. 2019;492:473–486. doi: 10.1016/j.apsusc.2019.06.169</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Enhanced photocatalytic activity of europium doped TiO&lt;sub&gt;2&lt;/sub&gt; under sunlight for the degradation of methyl orange / G. V. Khade, N. L. Gavade, M. B. Suwarnkar, M. J. Dhanavade, K. D. Sonawane, K. M. Garadkar // J. Mater. Sci. Mater. Electron. 2017. Vol. 28, no. 15. P. 11002–11011. doi: 10.1007/s10854-017-6883-9</mixed-citation><mixed-citation xml:lang="en">Khade G.V., Gavade N.L., Suwarnkar M.B., Dhanavade M.J., Sonawane K.D., Garadkar K.M. Enhanced photocatalytic activity of europium doped TiO&lt;sub&gt;2&lt;/sub&gt; under sunlight for the degradation of methyl orange. J. Mater. Sci. Mater. Electron. 2017:28(15):11002–11011. doi: 10.1007/s10854-017-6883-9</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Study of phase composition, photocatalytic activity, and photoluminescence of TiO&lt;sub&gt;2&lt;/sub&gt; with Eu additive produced by the extraction-pyrolytic method / V. Serga, R. Burve, A. Krumina, V. Pankratova, A. I. Popov, V. Pankratov // J. Mater. Res. Technol. 2021. Vol. 13. P. 2350–2360. doi: 10.1016/j.jmrt.2021.06.029</mixed-citation><mixed-citation xml:lang="en">Serga V., Burve R., Krumina A., Pankratova V., Popov A.I., Pankratov V. Study of phase composition, photocatalytic activity, and photoluminescence of TiO&lt;sub&gt;2&lt;/sub&gt; with Eu additive produced by the extractionpyrolytic method. J. Mater. Res. Technol. 2021;13:2350–2360. doi: 10.1016/j.jmrt.2021.06.029</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Егельский И. В., Мартынова Е. А., Пугачевский М. А. Изучение влияния времени гидротермального синтеза на фотокаталитические свойства легированных европием наночастиц диоксида титана // Актуальные вопросы науки, нанотехнологий, производства : сборник научных статей 3-й Международной научно-практической конференции. Курск: Университетская книга, 2023. С. 36–40.</mixed-citation><mixed-citation xml:lang="en">Egelskii I.V., Martynova E.A., Pugachevskii M.A. Study of the effect of hydrothermal synthesis time on the photocatalytic properties of europium-doped titanium dioxide nanoparticles. In: Aktualnye voprosy nauki, nanotekhnologij, proizvodstva: sbornik nauchnyh statej 3-j Mezhdunarodnoj nauchno-prakticheskoj konferencii = Topical issues of science, nanotechnology, production : Collection of scientific articles of the 3&lt;sup&gt;rd&lt;/sup&gt; International Scientific and Practical Conference. Kursk: Universitetskaya kniga; 2023. P. 36–40. (In Russ.)</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
