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Innovative photocatalyst (FeOx-TiO2): transients induced by femtosecond laser pulse leading to bacterial inactivation under visible lightстатья
Статья опубликована в высокорейтинговом журнале
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: 23 декабря 2016 г.
- Авторы: Rtimi S., Sanjines R., Kiwi J., Pulgarin C., Bensimon M., Khmel I., Nadtochenko V.
- Журнал: RSC advances
- Том: 5
- Номер: 123
- Год издания: 2015
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 101751
- Последняя страница: 101759
- DOI: 10.1039/c5ra18960h
- Аннотация: This study reports the photosensitizing effect/mechanism of FeOx under visible light irradiation and charge transfer to TiO2 on FeOx-TiO2 cosputtered film. The transients which were photo-induced by femto-second laser pulses at 545 nm (25 fs) were identified, in addition to the concomitant bleaching bands at <440 nm. Electron trapping at 150 fs was observed to compete with electron-hole recombination. A regularized inverse Laplace transform of the transient decay kinetics was worked out to determine the lifetime of the transients. About 50% of the charge carriers recombined within 500 fs, less than 50% of the charges recombined within 25 ps and a small percentage remained trapped. The transient decay within 500 ps did not decay to zero. This is the evidence for the photo-induced charges in FeOx-TiO2 leading subsequently to bacterial inactivation in the minute range. The second part of this study addresses the details of the FeOx-TiO2-PE photocatalyst performance during E. coli inactivation under solar light irradiation. The bacterial inactivation kinetics was similar under solar or visible light irradiation (> 400 nm). This observation unexpectedly confirms the role of FeOx absorbing light in the visible region. The important role of TiO2 is reported, leading to bacterial inactivation in the FeOx-TiO2 co-sputtered films.
- Добавил в систему: Надточенко Виктор Андреевич