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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">catal</journal-id><journal-title-group><journal-title xml:lang="ru">Катализ в промышленности</journal-title><trans-title-group xml:lang="en"><trans-title>Kataliz v promyshlennosti</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1816-0387</issn><issn pub-type="epub">2413-6476</issn><publisher><publisher-name>LLC "KALVIS"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18412/1816-0387-2024-3-72</article-id><article-id custom-type="elpub" pub-id-type="custom">catal-1023</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>КАТАЛИЗ В ХИМИЧЕСКОЙ И НЕФТЕХИМИЧЕСКОЙ ПРОМЫШЛЕННОСТИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CATALYSIS IN CHEMICAL AND PETROCHEMICAL INDUSTRY</subject></subj-group></article-categories><title-group><article-title>Простой синтез наноразмерных CuO и NiO золь-гель методом с использованием поливинилового спирта и применение этих оксидов в каталитическом эпоксидировании стирола</article-title><trans-title-group xml:lang="en"><trans-title>Facile synthesis of nanoscale CuO and NiO via the PVA-assisted sol-gel method and their exploration in the catalytic epoxidation of styrene</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>Bepari</surname><given-names>Ruhul Amin</given-names></name><name name-style="western" xml:lang="en"><surname>Bepari</surname><given-names>Ruhul Amin</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</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>Mochahari</surname><given-names>Nabajyoti</given-names></name><name name-style="western" xml:lang="en"><surname>Mochahari</surname><given-names>Nabajyoti</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Siddique</surname><given-names>Kibriya</given-names></name><name name-style="western" xml:lang="en"><surname>Siddique</surname><given-names>Kibriya</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Das</surname><given-names>Birinchi Kumar</given-names></name><name name-style="western" xml:lang="en"><surname>Das</surname><given-names>Birinchi Kumar</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Department of Chemistry, Gauhati University, Guwahati, Assam; Department of Instrumentation, Gauhati University, Guwahati, Assam</institution><country>Индия</country></aff><aff xml:lang="en"><institution>Department of Chemistry, Gauhati University, Guwahati, Assam; Department of Chemistry, Bhattadev University, Bajali, Pathsala, Assam</institution><country>India</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Department of Chemistry, Bhattadev University, Bajali, Pathsala, Assam</institution><country>Индия</country></aff><aff xml:lang="en"><institution>Department of Chemistry, Bhattadev University, Bajali, Pathsala, Assam</institution><country>India</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Department of Instrumentation, Gauhati University, Guwahati, Assam</institution><country>Индия</country></aff><aff xml:lang="en"><institution>Department of Instrumentation, Gauhati University, Guwahati, Assam</institution><country>India</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>27</day><month>05</month><year>2024</year></pub-date><volume>24</volume><issue>3</issue><fpage>72</fpage><lpage>72</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; LLC "KALVIS", 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">LLC "KALVIS"</copyright-holder><copyright-holder xml:lang="en">LLC "KALVIS"</copyright-holder><license xlink:href="https://www.catalysis-kalvis.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.catalysis-kalvis.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.catalysis-kalvis.ru/jour/article/view/1023">https://www.catalysis-kalvis.ru/jour/article/view/1023</self-uri><abstract><p>Полностью статья будет опубликована в английской версии журнала «Catalysis in Industry» № 4, 2024 г.</p><p>Наноразмерные оксиды меди и никеля диаметром 17 и 25 нм, соответственно, были синтезированы простым золь-гель методом с использованием поливинилового спирта (ПВС). Этот способ включает простое диспергирование ионов металлов (меди или никеля) в ПВС-гель и последующее прокаливание высушенного геля при температуре 400 °C в течение 3 ч. Полученные оксидные материалы были охарактеризованы с помощью различных физических методов, таких как термогравиметрический анализ, рентгенофазовый анализ, сканирующая электронная микроскопия, просвечивающая электронная микроскопия и УФ-ВИД ИК-спектроскопия. Установлено, что синтезированные оксиды являются очень эффективными катализаторами при эпоксидировании стирола. CuO обеспечивает 87 %-ную конверсию стирола и 88 %-ную селективность по оксиду стирола, в то время как NiO – 69 %-ную конверсию стирола и 80 %-ную конверсию с использованием трет-бутилгидропероксида в качестве окислителя по истечении 6 ч. Оба катализатора могут использоваться повторно в течение нескольких последовательных циклов без заметной потери активности и селективности. Благодаря отличным каталитическим характеристикам, экономически эффективному синтезу и возможности повторного использования синтезированные оксиды становятся перспективными катализаторами для промышленного применения.</p></abstract><trans-abstract xml:lang="en"><p>The full-text of the article will be published in the English version of the journal "Catalysis in Industry" No. 4, 2024.</p><p>Both nanoscale copper oxide and nickel oxides, with diameter 17 and 25 nm respectively, have been synthesized via an easy sol-gel method using polyvinyl alcohol. The method involves the simple dispersion of metal ions (M2+ = Cu or Ni) into the PVA gel and subsequent calcination of the dried gel at 400 °C for 3 h. The synthesized oxide materials are characterized by different physical tools like TGA, powder XRD, SEM, TEM and DRS UV-visible spectroscopic technique. The oxides are found to be very efficient catalysts in the epoxidation of styrene. CuO gives 87 % styrene conversion and 88 % SO selectivity while, NiO gives 69 % styrene conversion and 80 % with TBHP as an oxidant at the end of 6 h. Both the catalysts can suitably be reused for several successive runs without appreciable loss in activity and selectivity. The cost-effective synthesis, excellent catalytic performance and reusability make these oxides promising catalysts for the industrial use.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>CuO</kwd><kwd>NiO</kwd><kwd>наночастицы</kwd><kwd>золь-гель</kwd><kwd>прокаливание</kwd><kwd>стирол</kwd><kwd>эпоксидирование</kwd><kwd>трет-бутилгидропероксид</kwd></kwd-group><kwd-group xml:lang="en"><kwd>CuO</kwd><kwd>NiO</kwd><kwd>nanoparticles</kwd><kwd>sol-gel</kwd><kwd>calcination</kwd><kwd>styrene</kwd><kwd>epoxidation</kwd><kwd>TBHP</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Alghamdi, H. M. A., Opt. 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