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dc.contributor.authorLiu, Jinen_US
dc.contributor.authorGuo, Shengen_US
dc.contributor.authorWu, Hongzhangen_US
dc.contributor.authorZhang, Xinleien_US
dc.contributor.authorLi, Junen_US
dc.contributor.authorZhou, Kunen_US
dc.identifier.citationLiu, J., Guo, S., Wu, H., Zhang, X., Li, J. & Zhou, K. (2021). Synergetic effects of Bi⁵⁺ and oxygen vacancies in Bismuth(V)-rich Bi₄O₇ nanosheets for enhanced near-infrared light driven photocatalysis. Journal of Materials Science & Technology, 85, 1-10.
dc.description.abstractThe appropriate energy level position of photocatalysts dominates the photocatalytic redox reaction and utilization efficiency of solar energy for wastewater treatment. Herein, we report a near-infrared (NIR) light driven Bi5+-rich Bi4O7 photocatalyst, achieving a greatly enhanced photocatalytic activity for pollutant removal compared with Bi3+-replenished Bi2O3. Density functional theory calculations show the formation of an intermediate band in the Bi4O7 structure because of the hybridization of O 2p and Bi 4s orbits. The formation of the intermediate band not only narrows the band gap but also improves the optical absorption property and separation efficiency of the photoinduced carriers. The existence of the oxygen vacancies (OVs) in the Bi4O7 nanosheets ensures high carriers’ concentration, which is verified by the Hall effect test. The synergetic effects of the OVs and Bi5+ greatly accelerate the separation efficiency of the photogenerated carriers. Consequently, the Bi4O7 nanosheets exhibit enhanced NIR light driven photocatalytic activity for the degradation of rhodamine B and ciprofloxacin compared with the bulk Bi2O3. This study paves the way to the design of highly efficient NIR light-responsive Bi-based photocatalysts for environmental purification.en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.relation.ispartofJournal of Materials Science & Technologyen_US
dc.rights© 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. All rights reserved.en_US
dc.subjectEngineering::Environmental engineeringen_US
dc.titleSynergetic effects of Bi⁵⁺ and oxygen vacancies in Bismuth(V)-rich Bi₄O₇ nanosheets for enhanced near-infrared light driven photocatalysisen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchEnvironmental Process Modelling Centreen_US
dc.subject.keywordsNear-Infrared Lighten_US
dc.subject.keywordsOxygen Vacanciesen_US
dc.description.acknowledgementThis work is supported by the National Natural Science Foundation of China (No. 21806194), the Outstanding Talent Research Fund of Zhengzhou University (No. 32340099), and the Nanyang Environment and Water Research Institute (Core Fund), Nanyang Technological University, Singapore.en_US
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