Мезопористые титанаты магния в процессах фотокаталитического окисления полициклических ароматических углеводородов

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Abstract

Гетероструктурные мезопористые материалы TiO2–MgO с удельной поверхностью 22.0‒28.4 м2·г–1 и средним диаметром пор 17‒24 нм получены методом самораспространяющегося высокотемпературного синтеза из глицин-цитрат-нитратных водных растворов, исследован их фазовый состав и микроструктура. Изучена их эффективность в процессах фотокаталитического окисления полициклических ароматических углеводородов под воздействием естественного солнечного света и установлено, что наибольшая степень фотокаталитического окисления флуорена, пирена и бензапирена (80, 68 и 53% соответственно) в присутствии нанокомпозитa TiO2|MgTi2O5|MgTiO3 под действием естественного солнечного света достигается с дозой фотокатализатора 1 мг·л–1 и при рН 7.

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About the authors

Ирина Васильевна Мацукевич

Центр функционального и поверхностно-функционализированного стекла (FunGlass)

Author for correspondence.
Email: iryna.matsukevich@tnuni.sk
ORCID iD: 0000-0001-6686-4213

к.х.н., доцент

Slovakia, Студенческая 2, г. Тренчин, 91150

Наталья Владимировна Кулинич

Институт общей и неорганической химии НАН Беларуси

Email: kulinich.55@yandex.by
ORCID iD: 0000-0003-2242-3437
Belarus, Сурганова 9/1, г. Минск, 220072

Елена Бельжин

Университет Нови Сада

Email: iryna.matsukevich@tnuni.sk
ORCID iD: 0000-0001-9269-4377

к.х.н., доцент

Serbia, Доситея Обрадовича 3, г. Нови-Сад, 21102

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Supplementary files

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2. Fig. 1. X-ray diffraction patterns of mesoporous TiO2–MgO composite materials after final heat treatment at 750°C. TM1 - TiO2 MgO, TM2 - TiO2 4MgO, TM3 - 2TiO2 MgO, TM4 - 3TiO2 MgO, TM5 - 3TiO2 2MgO, TM6 - 3TiO2 4MgO; Miller indices are indicated for the MgTiO3 phase.

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3. Fig. 2. Electron micrographs of magnesium titanate with a given composition TiO2·MgO.

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4. Fig. 3. Isotherms of low-temperature nitrogen adsorption–desorption (a) and differential mesopore size distributions (b) of TiO2–MgO nanocomposites. 1 - TiO2 MgO, 2 - TiO2 4MgO, 3 - 3TiO2 MgO.

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5. Fig. 4. The degree of photodegradation of fluorene (a, d), pyrene (b, e) and benzopyrene (c, f) under the influence of sunlight depending on the dose of photocatalyst (a–c) and pH (d–f). 1 - without photocatalyst, 2 - TiO2 MgO, 3 - TiO2 4MgO, 4 - 3TiO2 MgO.

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