Engineering the band structure of CuO via decoration with AgBr to enhance its photocatalytic degradation performance

Design and development of high-effective photocatalysts to remove multiple organic pollutants are a great challenge. Herein, the band structure of CuO is regulated by constructing the heterostructures between AgBr and CuO, which is realized by controlling hybrid morphologies. The as-prepared AgBr/Cu...

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Bibliographic Details
Published in:Journal of materials science 2023-05, Vol.58 (17), p.7333-7346
Main Authors: Yasin, Umsalama Abuelgasim Abubakr, Ahmed, Md. Maruf, Zhang, Juan, Jia, Zhixin, Guo, Tianyu, Zhao, Ruihua, Shi, Jiahui, Du, Jianping
Format: Article
Language:English
Subjects:
Band structure of solids
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Composites & Nanocomposites
Copper oxide
Copper oxides
Crystallography and Scattering Methods
Cuprite
Electron transfer
Electron transport
Ethylenediaminetetraacetic acid
Heterojunctions
Heterostructures
Materials Science
Methylene blue
Nanoparticles
Performance degradation
Photocatalysis
Photocatalysts
Photodegradation
Pollutants
Polymer Sciences
Raw materials
Rhodamine
Silver nitrate
Solid Mechanics
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Summary:Design and development of high-effective photocatalysts to remove multiple organic pollutants are a great challenge. Herein, the band structure of CuO is regulated by constructing the heterostructures between AgBr and CuO, which is realized by controlling hybrid morphologies. The as-prepared AgBr/CuO material consists of CuO nanoflakes and AgBr nanoparticles. Notably, AgBr nanoparticles are adhering on the surface of CuO nanosheets, which favors the formation of heterojunction with point to plane contact and fasten electron transfer. The photocatalytic results show that the AgBr/CuO photocatalyst, prepared by using the 0.1 mol AgNO 3 and KBr as raw materials, presents superior photodegradation activity toward degradation of multi-pollutants with dye concentration of 15 mg L −1 and pH = 7. The methyl violet removal rate reaches 98% within 60 min in the present of 0.1 g catalyst under visible light, and rhodamine B and methyl blue are degraded to 98 and 78% within 90 min. The radical trapping tests prove that photogenerated superoxide radicals (∙O 2 − ) and holes (h + ) act as the main active species in photodegradation of MV. The result indicates that point to plane-contacted heterostructure of AgBr/CuO material plays a key role and it has potential application in the environment remediation. Graphical abstract
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-023-08487-3