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EPR Study of Photoexcited Charge Carrier Behavior in TiO2/MoO3 and TiO2/MoO3:V2O5 Photocatalystsстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 15 августа 2019 г.
- Авторы: Konstantinova E.A., Kokorin A.I., Minnekhanov A.A., Sviridova T.V., Sviridov D.V.
- Журнал: Catalysis Letters
- Том: 149
- Номер: 8
- Год издания: 2019
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 2256
- Последняя страница: 2267
- DOI: 10.1007/s10562-019-02830-7
- Аннотация: Metal oxide photocatalysts TiO2/MoO3 and TiO2/MoO3:V2O5 have been investigated by electron paramagnetic resonance (EPR) spectroscopy under in situ light excitation. Structural identification of all paramagnetic centers (PCs) recorded, such as surface and lattice Ti3+ ions as well as Mo5+ and V4+ ions and nitrogen 14N atoms containing the unpaired electron (“N•-radicals”), have been performed. The temperature behavior of PCs in the range of 30–300 K and photoinduced changes of EPR spectra under light irradiation have been investigated. The validity of the Curie law was confirmed for the PCs of such composite photocatalysts. A new original method of detection of charge carrier separation and accumulation is suggested using EPR-technique. It is shown that TiO2/MoO3 and TiO2/MoO3:V2O5 photocatalysts are capable to accumulate photogenerated charge providing fresh possibilities for practical applications in photocatalysis because these oxide heterostructures retaining oxidation activity for a long time (more than 5 hours) under the dark conditions after illumination.
- Добавил в систему: Константинова Елизавета Александровна