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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2023-14-1-98-106</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-198</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="en"><subject>CHEMISTRY AND MATERIALS SCIENCE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ХИМИЯ И НАУКА О МАТЕРИАЛАХ</subject></subj-group></article-categories><title-group><article-title>A comparative study of photocatalytic degradation of Xylenol Orange dye under natural sunlight over ZnO nanoparticles synthesized via mechanochemical and hydrothermal assistance routes</article-title><trans-title-group xml:lang="ru"><trans-title>Сравнительное исследование фотокаталитической деградации красителя ксиленолового оранжевого под действием естественного солнечного света с наночастицами ZnO, синтезированными механохимическим и гидротермальным способами</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калданте</surname><given-names>Ю. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Kaldante</surname><given-names>Y. D.</given-names></name></name-alternatives><bio xml:lang="en"><p>Yogeshwar D. Kaldante – Department of Chemistry,</p><p>Otur, Pune, Maharashtra – 412409.</p></bio><email xlink:type="simple">ydkaldante@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Часкар</surname><given-names>М. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Chaskar</surname><given-names>M. G.</given-names></name></name-alternatives><bio xml:lang="en"><p>Manohar G. Chaskar – Department of Chemistry,</p><p>Akurdi, Maharashtra – 411044.</p></bio><email xlink:type="simple">chaskarmanohar@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>PDEA’s Annasaheb Waghire College</institution><country>India</country></aff><aff xml:lang="en" id="aff-2"><institution>PDEA’s Prof. Ramkrishna More College</institution><country>India</country></aff><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>05</day><month>06</month><year>2025</year></pub-date><volume>14</volume><issue>1</issue><fpage>98</fpage><lpage>106</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kaldante Y.D., Chaskar M.G., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Калданте Ю.Д., Часкар М.Г.</copyright-holder><copyright-holder xml:lang="en">Kaldante Y.D., Chaskar M.G.</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://nanojournal.ifmo.ru/jour/article/view/198">https://nanojournal.ifmo.ru/jour/article/view/198</self-uri><abstract><p>Current work confers mechanochemical and hydrothermal syntheses of ZnO, its characterization and photocatalytic applications. Mechanochemical and hydrothermal assisted syntheses of ZnO involve two stages viz. formation of precursors followed by its calcination. The suitable calcination temperature for precursor materials to get ZnO was obtained by TG-DTA and FT-IR Spectroscopic study; XRD data of these samples specified hexagonal wurtzite crystallite structures of ZnO. FESEM photographs of mechanochemically and hydrothermally synthesize ZnO confirmed nanocrystalline hexagonal granular and stacked block-like particle morphologies respectively. EDX spectra of these samples support their elemental purity. The UV-DRS study was used to measure the optical band gap of ZnO samples. Optical properties of ZnO samples were also studied with room temperature PL spectra. Photocatalytic applications of aforementioned ZnO samples were investigated with Xylenol Orange as a model organic dye. The PCD efficiency of ZnO was estimated in terms of percent degradation reference to various operating factors.</p></abstract><trans-abstract xml:lang="ru"><p>Работа посвящена механохимическому и гидротермальному синтезу ZnO, определению его характеристик и фотокаталитическому применению. Механохимический и гидротермальный синтез ZnO состоит из двух стадий: образования прекурсоров и последующего их прокаливания. Подходящая температура прокаливания исходных материалов для получения ZnO была определена с помощью DTA/TG и FTIR-спектроскопии. Данные XRD этих образцов указывают на гексагональную кристаллическую структуру вюрцита ZnO. Фотографии FESEM образцов окида цинка, синтезированных механохимическим и гидротермальным методами показали морфологию нанокристаллических гексагональных гранул и блочных частиц соответственно. Спектры EDX этих образцов подтверждают их элементную чистоту. Исследование UV-DRS использовалось для измерения оптической ширины запрещенной зоны образцов ZnO. Оптические свойства образцов ZnO также изучались по спектрам PL при комнатной температуре. Фотокаталитическое применение вышеупомянутых образцов ZnO было исследовано с ксиленоловым оранжевым в качестве модельного органического красителя. Эффективность PCD ZnO оценивалась в процентах разложения по отношению к различным рабочим факторам.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>оксид цинка</kwd><kwd>ксиленоловый оранжевый</kwd><kwd>механохимический синтез</kwd><kwd>гидротермальный синтез</kwd><kwd>эффективность PCD</kwd></kwd-group><kwd-group xml:lang="en"><kwd>zinc oxide</kwd><kwd>Xylenol Orange</kwd><kwd>mechanochemical</kwd><kwd>hydrothermal</kwd><kwd>PCD efficiency</kwd></kwd-group><funding-group><funding-statement xml:lang="en">Authors are exclusively grateful to PDEA’s Annasaheb Waghire College, Otur for providing their continuous and valuable support, in terms of amenities like laboratories for all experimental work and library for the literature review. 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