Получение и фотокаталитические свойства композитных фотокатализаторов TiO2-MCM-22

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Разработан быстрый и простой метод синтеза эффективных фотокатализаторов на основе диоксида титана и мезопористого цеолита MCM-22 из различных прекурсоров титана. Полученные фотокатализаторы были проанализированы методами рентгенофазового анализа (РФА), низкотемпературной адсорбции азота, растровой электронной микроскопии (РЭМ). Фотокаталитическая активность образцов TiO2-MCM-22 была протестирована в реакциях фотокаталитического разложения красителя кристаллического фиолетового и окисления ацетона. Наибольшую фотокаталитическую активность продемонстрировал образец с соотношением TiO2-цеолит 1 : 1, полученный из тетрахлорида титана. Степень деградации кристаллического фиолетового составила 22% при УФ-облучении в течение 2 ч, а в реакции разложения ацетона активность составила 642 млн д. (выход CO2).

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Sobre autores

Алексей Садовников

Институт нефтехимического синтеза им. А. В. Топчиева РАН; Институт общей и неорганической химии им. Н. С. Курнакова РАН

Autor responsável pela correspondência
Email: sadovnikov@ips.ac.ru
ORCID ID: 0000-0002-3574-0039
Rússia, Москва, 119991; Москва, 119991

Евгений Наранов

Институт нефтехимического синтеза им. А. В. Топчиева РАН

Email: sadovnikov@ips.ac.ru
ORCID ID: 0000-0002-3815-9565

к. х. н.

Rússia, Москва, 119991

Кристина Новоселова

Институт общей и неорганической химии им. Н. С. Курнакова РАН

Email: sadovnikov@ips.ac.ru
ORCID ID: 0009-0006-4139-1476
Rússia, Москва, 119991

Рикардо Родригес Пинеда

Институт нефтехимического синтеза им. А. В. Топчиева РАН

Email: sadovnikov@ips.ac.ru
ORCID ID: 0009-0001-2744-2242
Rússia, Москва, 119991

Антон Максимов

Институт нефтехимического синтеза им. А. В. Топчиева РАН

Email: sadovnikov@ips.ac.ru
ORCID ID: 0000-0001-9297-4950

д. х. н., академик РАН

Rússia, Москва, 119991

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2. Fig. 1. Diffraction patterns of MCM-22/TiO2 photocatalyst samples with different MCM-22: TiO2 ratios obtained using titanium tetrachloride.

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3. Fig. 2. SEM images of the synthesized zeolite MCM-22.

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4. Fig. 3. SEM images of catalyst samples: (a) MCM-22/TiO2 (9:1), (b) MCM-22/TiO2 (3:1), (c) MCM-22/TiO2 (1:1) from titanium tetrachloride, (d) MCM-22/TiO2 (1:1) from titanium isopropoxide at a magnification of 100,000 x.

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5. Fig. 4. XPS spectra of O1s, Si2p, Al2p of the MCM-22/TiO2 (3:1) sample.

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6. Fig. 5. Comparison of the rates of photocatalytic decomposition of crystal violet dye in the presence of different samples of titanium dioxide under UV irradiation: (a) rate of photocatalytic decomposition of crystal violet dye in the presence of different samples of titanium dioxide; (b) dependence of the concentration of formed CO2 in the reaction of photocatalytic decomposition of acetone under UV irradiation of different studied photocatalysts; (c) efficiency of photocatalytic oxidation of acetone under UV irradiation.

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