vuzbiochemiИзвестия вузов. Прикладная химия и биотехнологияProceedings of Universities. Applied Chemistry and Biotechnology2227-29252500-1558ИРНИТУ10.21285/2227-2925-2019-9-2-176-182vuzbiochemi-188Research ArticleХИМИЧЕСКИЕ НАУКИCHEMICAL SCIENCESФотохимическое разложение фенола в присутствии наночастиц диоксида титанаPhotochemical degradation of phenol in the presence of titanium dioxide nanoparticlesКадыроваЭ. М.GadirovaE. M.

к.х.н., доцент, 

г. Баку

elmina2010@mail.ru

Ph.D. (Chemistry), Associate Professor,

Baku

info@bsu.edu.azБакинский государственный университетРоссияBaku State UniversityRussian Federation20192709201992176182Copyright © Кадырова Э.М., 20192019Кадырова Э.М.Gadirova E.M.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vuzbiochemi.elpub.ru/jour/article/view/188

Известно, что сброс промышленных и бытовых сточных вод, неизбежно попадающих в источники чистой воды, приводит к загрязнению экосистем и тяжелым экологическим последствиям. Ввиду истощения запасов пресной воды в мире первостепенное значение имеет поиск новых высокоэффективных методов очистки загрязненных вод с целью минимизации содержания в них токсичных веществ. Диоксид титана, чьи фотокаталитические свойства являются в последние годы предметом особого внимания, позволяет повысить эффективность технологических процессов очистки воды и воздуха от токсичных органических примесей. Целью настоящего исследования являлось изучение фотохимического разложения фенола наночастицами диоксида титана (TiO2) для обработки токсичных веществ в водоемах. Качественный и количественный анализ исходных и конечных продуктов фотолиза осуществляли методом газовой хроматографии. Нанопорошок диоксида титана был получен золь-гель методом в мягких условиях без последующей термической обработки, используя изопропоксид титана (IV), изопропиловый спирт и гидроксид аммония в качестве прекурсоров. Методом рентгеновской дифракции было показано, что полученный диоксид титана представлен фазой рутила. Размер наночастиц определен методом просвечивающей электронной микроскопии высокого разрешения и составляет 10–20 нм. Удельная площадь поверхности в соответствии с методом БЭТ составляла 159,6 м2 /г. Фотохимическое разложение раствора фенола было проведено под действием УФ-излучения с использованием в качестве катализатора полученного нанопорошка диоксида титана. Продукты разложения фенола анализировали на газовом хроматографе 6890N GC-MSD с высокопроизводительным масс-селективным детектором Agilent 5975. Установлено, что степень деградации фенола в присутствии нанопорошка диоксида титана составила 99%.

In this article, a description of the photochemical degradation of phenol with TiO2 nanoparticles for the treatment of toxic substances in water basins is presented. Such research is of great relevance due to the discharge of wastewater into clean water basins resulting in a contamination of ecosystems with very ecological consequences. Due to the seemingly inevitable reduction in the world’s freshwater reservoirs, finding new methods for the high-level purification of contaminated waters so as to minimise the toxic substance content is of paramount importance. Composition and quantitative analysis of the photolysis solution was carried out using the gas chromatographic method. TiO2 nanopowders were prepared using the sol-gel method from titanium IV isopropoxide (TTIP), isopropyl alcohol and ammonium hydroxide precursors under normal conditions without any post-heat treatment for crystallisation. The nanocrystalline rutile-phase TiO2 powders were characterised by X-ray powder diffraction (XRD). The size of nanoparticles as confirmed by transmission electron microscopy (TEM) was about 10–20 nm, while the Brunauer–Emmett–Teller (BET) specific surface area of the rutile nanopowder was 159.6 m2/g. The photocatalytic performance of the synthesised nanopowders photochemical was observed to enhance degradation of the phenol solution under UV irradiation. The phenol degradation was quantitatively analysed using a 6890N GC-MSD gas chromatograph with an Agilent 5975 highperformance mass-selective detector. Degradation of phenol in the presence of TiO2 nanopowders yielded a rate of 99%. 

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