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An in situ assembled WO3-TiO2 vertical heterojunction for enhanced Z-scheme photocatalytic activity.
Liu, Yue; Zeng, Xiangkang; Easton, Christopher D; Li, Qinye; Xia, Yun; Yin, Yichun; Hu, Xiaoyi; Hu, Jian; Xia, Dehua; McCarthy, David T; Deletic, Ana; Sun, Chenghua; Yu, Jiaguo; Zhang, Xiwang.
Afiliação
  • Liu Y; Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia. xiwang.zhang@monash.edu.
Nanoscale ; 12(16): 8775-8784, 2020 Apr 30.
Article em En | MEDLINE | ID: mdl-32270841
The face-to-face contact of a vertical heterojunction is beneficial to charge interaction in photocatalysis. However, constructing a vertical heterojunction with uncompromised redox ability still remains a challenge. Herein, we report the successful synthesis of a WO3-TiO2 vertical heterojunction via establishing an internal electric field across the interface. Experimental investigation and computational simulations reveal that strong electric coupling occurs at the WO3-TiO2 interface forming an internal electric field. The internal electric field induces a Z-scheme charge-carrier transfer through the heterojunction under light irradiation, which leads to effective charge separation and maintains high reaction potentials of charge-carriers. The improved photocatalytic activity of the WO3-TiO2 heterojunction is proved by enhanced generation of reactive oxygen species and accelerated Escherichia coli (E. coli) disinfection. This study provides new insights into understanding and designing Z-scheme heterogeneous photocatalysts.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article