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Photoelectrocatalytic activity of In(III)-modified TiO2 photoanodes in the visible spectrum regionстатья Исследовательская статья
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: 11 ноября 2020 г.
- Авторы: Grinberg V.A., Emets V.V., Maslov D.A., Tsodikov M.V., Mayorova N.A., Averin A.A., Fedotov A.S., Marinova M., P Simon
- Журнал: New Journal of Chemistry
- Том: 44
- Год издания: 2020
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 16200
- Последняя страница: 16210
- DOI: 10.1039/d0nj03162c
- Аннотация: Nanocrystalline film photoanodes of titanium dioxide modified with In(III) ions in the concentration range from 1.0 to 10 mass% (0.23 to 2.52 at%) are manufactured using the sol–gel method. Their physicochemical characteristics and the structure of In-containing compounds on the TiO2 surface are investigated via transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-vis absorption spectroscopy. The photoelectrocatalytic activity of these anodes in the reactions of methanol and formic acid electrooxidation studied under illumination with monochromatic light (369 and 461 nm; 7.5 and 10 mW cm2, respectively) and visible light (a sunlight simulator; 100 mW cm2) is shown to decrease symbatically with an increase in indium content.It is also shown that a selective photoelectrooxidation of methanol is observed for titanium dioxide modified with 0.23 at% In in a potential region of (780 C 550 mV). Using photocurrent modulation spectroscopy (IMPS), the recombination rate constants and the charge carrier transfer efficiency are determined under illumination of the modified photoanode with monochromatic light (369 nm; 7.5 mW cm2) at a potential of 0.8 V in a solution of 0.1 M KOH containing methanol. It is demonstrated that the doping of titanium dioxide with 0.23 at% In promotes both an increase in the current of electron–hole pair generation and a decrease in recombination losses.
- Добавил в систему: Гринберг Виталий Аркадьевич