vguitВестник Воронежского государственного университета инженерных технологийProceedings of the Voronezh State University of Engineering Technologies2226-910X2310-1202VSUET10.20914/2310-1202-2020-1-237-246vguit-2464Research ArticleХимическая технологияFundamental and Applied chemistry, chemical technologyВлияние термообработки на свойства катализатора синтеза углеродных нанотрубокThe influence of heat treatment on the properties of the catalyst for the synthesis of carbon nanotubeshttps://orcid.org/0000-0001-8927-7433БураковаЕ. А.BurakovaE. A.

к.т.н., доцент, кафедра техники и технологий производства нанопродуктов, ул. Советская 106, г. Тамбов, 392000, Россия

Cand. Sci. (Engin.), associate professor, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia

elenburakova@ya.ruhttps://orcid.org/0000-0001-5961-3432БесперстоваГ. С.BesperstovaG. S.

аспирант, кафедра техники и технологий производства нанопродуктов, ул. Советская 106, г. Тамбов, 392000, Россия

graduate student, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia

bes.galina@mail.ruНевероваМ. А.NeverovaM. A.

соискатель, кафедра техники и технологий производства нанопродуктов, ул. Советская 106, г. Тамбов, 392000, Россия

applicant, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia

gaaral@mail.ruhttps://orcid.org/0000-0001-5099-9682ТкачевА. Г.TkachevA. G.

д.т.н., профессор, кафедра техники и технологий производства нанопродуктов, ул. Советская 106, г. Тамбов, 392000, Россия

Dr. Sci. (Engin.), professor, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia

noreplay@elpub.ruЧапаксовН. А.ChapaksovN. A.

аспирант, кафедра техники и технологий производства нанопродуктов, ул. Советская 106, г. Тамбов, 392000, Россия

graduate student, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia

tchapaxov.nikolaj@ya.ruРуховА. В.RukhovA. V.

д.т.н., доцент, кафедра химии и химических технологии, ул. Советская 106, г. Тамбов, 392000, Россия

Dr. Sci. (Engin.), associate professor, chemistry and chemical technology department, 106, Sovetskaya Str., Tambov, Russia

artem1@inbox.ruТамбовский государственный технический университетРоссияTambov State Technical UniversityRussian Federation202027032020821237246Copyright © Буракова Е.А., Бесперстова Г.С., Неверова М.А., Ткачев А.Г., Чапаксов Н.А., Рухов А.В., 20202020Буракова Е.А., Бесперстова Г.С., Неверова М.А., Ткачев А.Г., Чапаксов Н.А., Рухов А.В.Burakova E.A., Besperstova G.S., Neverova M.A., Tkachev A.G., Chapaksov N.A., Rukhov A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.vestnik-vsuet.ru/vguit/article/view/2464

В данной работе изучено влияние термообработки на текстурные характеристики Со-Мо/Al2O3 катализатора синтеза углеродных нанотрубок (УНТ). Экспериментально доказано, что условия термообработки на стадии получения металлоксидного катализатора оказывают существенное влияние не только на его морфологию, но и на его активность в процессе синтеза УНТ. Выявлено, что реализация термической обработки раствора исходных компонентов в одну стадию (разложение) позволяет получить каталитическую систему с удельной поверхностью Sкат ~ 14?26 м2/г и удельным выходом ? ~ 5,2?9,4 гугл/гкат, а в две стадии (разложение/прокаливание) – Sкат ~ 30?147 м2/г и ? ~ 18,6?30,0 гугл/гкат. При этом наименьшей степенью дефектности (ID/G ~ 0.53?0.72) обладают УНТ, синтезированные на катализаторах, сформированных в результате термического разложения в течение 10 мин при 350 ?С и прокаливания при 500 ?С, диаметр нанотрубок составлял 15?19 нм. Использование в процессе синтеза УНТ металлоксидного катализатора, прошедшего прокаливание при более высоких температурах (700 оС и выше), приводит к увеличению диаметра и степени дефектности формируемых наноструктур. Таким образом, введение дополнительной стадии термообработки – прокаливания в процесс получения Co-Mo/Al2O3 катализатора дает возможность гибкого управления качественными показателями не только формируемых металлоксидных систем, но и синтезируемых на них УНТ.

In this paper, we studied the effect of heat treatment on the texture characteristics of Co-Mo/Al2O3, a catalyst for the synthesis of carbon nanotubes (CNTs). It has been experimentally proved that the heat treatment conditions at the stage of obtaining the metal oxide catalyst have a significant effect not only on its morphology, but also on its activity in the process of synthesis of CNTs. It was found that the implementation of the heat treatment of the starting components in one stage (decomposition) allows to obtain a catalytic system with a specific surface of ~ 14 ? 26 m2/g and a specific yield of ? ~ 5.2 ? 9.4 gС/gcat, and in two stages (decomposition / calcination) - Scat ~ 30 ? 147 m2/g and ? ~ 18.6 ? 30.0 gС/gcat. The smallest degree of defectiveness (ID / G ~ 0.53 ? 0.72) includes CNTs synthesized on a catalyst formed as a result of thermal changes for 10 min at 350 ° C and calcination at 500 °C, the diameter of the nanotubes is 15 ? 19 nm. The use of a metal oxide catalyst during the synthesis of CNTs, which has been calcined at higher temperatures (700 °C and above), leads to an increase in the speed and degree of defectiveness of the resulting nanostructures. Thus, the introduction of an additional heat treatment stage — calcination in the process of obtaining the Co-Mo/ Al2O3 catalyst — makes it possible to flexibly control the quality parameters of not only the formed metal oxide systems, but also the CNTs synthesized on them.

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The authors declare that there are no conflicts of interest present.