Engineering Z-scheme TiO2-OV-BiOCl via oxygen vacancy for enhanced photocatalytic degradation of imidacloprid; Dalton Transactions; Vol. 49, iss. 31

Engineering Z-scheme TiO2-OV-BiOCl via oxygen vacancy for enhanced photocatalytic degradation of imidacloprid; Dalton Transactions; Vol. 49, iss. 31

Dades bibliogràfiques
Parent link:Dalton Transactions
Vol. 49, iss. 31.— 2020.— [P. 11010-11018]
Autor corporatiu: Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий
Altres autors: Yang Bing, Zheng Jiliang, Li Wei, Wang Rongjie, Li Danya, Guo Xuhong, Rodriguez (Rodriges) Contreras R. D. Raul David, Jia Xin
Sumari:Title screen
The development and application of photocatalysts with strong redox ability to degrade refractory pesticides is the key to eliminating pesticide contamination. In this work, we develop a facile, time-saving, and surfactant-assisted method to fabricate a new Z-scheme heterojunction based on TiO2/BiOCl. This photocatalyst is rich in oxygen vacancy defects (TiO2-OV-BiOCl), and displays an excellent photocatalytic degradation performance for imidacloprid (IMD), and a possible degradation pathway of IMD is provided. The surfactant F127 plays an essential role in regulating the oxygen vacancy defects (OVDs) of TiO2-OV-BiOCl, where the OVD mainly exists in 5 layer BiOCl ultrathin nanosheets. Free radical trapping experiments demonstrate that the introduction of an OVD in BiOCl as a ‘charge mediator’ changes the charge-transfer mode from a type-II mechanism to a Z-scheme mechanism. The formation of a Z-scheme heterojunction leads to an excellent light utilization and higher separation efficiency of photogenerated charge carriers with a prolonged lifetime compared to those of BiOCl and TiO2/BiOCl. This work highlights the critical role of an OVD in the construction of a Z-scheme heterojunction of TiO2/BiOCl, and it can be applied to construct efficient photocatalytic systems for pesticide degradation.
Режим доступа: по договору с организацией-держателем ресурса
Idioma:anglès
Publicat: 2020
Matèries:
электронный ресурс
труды учёных ТПУ
Accés en línia:https://doi.org/10.1039/D0DT02128H
Format: Electrònic Capítol de llibre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664471

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