Oxygen deficiencies and metallic Bi-mediated photocatalytic activity of bismuth tungsten oxides

• Published in: Applied surface science Vol. 463; pp. 872 - 878
• Main Authors: Ji, Lulu, Li, Bin, Xu, Xuetang, Wang, Fan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2019
• Subjects: Bismuth tungsten oxides; Metallic Bi; Oxygen deficiencies; Photocatalysts; Metallic Bi; Bismuth tungsten oxides; Oxygen deficiencies; Photocatalysts
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2018.09.011

[Display omitted] •Bi/Bi3.84W0.16O6.24 (Bi-BWO) hybrid photocatalyst prepared by hydrothermal reduction.•Bi-BWO-8 hshows superior visible-light photocatalytic activity on degradation of RhB.•Oxygen deficiencies and Bi metal co-contributes to the superior catalytic activity. Herein, the metallic Bi-modified Bi3.84W0.16O6.24 hybrid with oxygen deficiencies is synthesized via a facile one-pot solvothermal reduction method. The synergistic effect of the deposited Bi metal and oxygen deficiencies results in the effective separation of the photogenerated carriers in Bi3.84W0.16O6.24 and the enhancement of the photo-response properties. As a result, Bi/Bi3.84W0.16O6.24 exhibited outstanding visible-light photocatalytic activities and sustained cycling performance. Under visible-light irradiation, nearly 96% of RhB is degraded after 15 min. Radical trapping experiments indicate that h+ and •OH are the main active species. This study provides an attractive avenue to design and fabricate highly efficient Bi-based photocatalysts, which possess a high application value in the field of environmental remediation, especially for wastewater purification.