期刊
CHEMICAL PHYSICS
卷 548, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.chemphys.2021.111228
关键词
BiOBr; Photocatalyst; Z-scheme heterojunction; Visible light catalysis
资金
- Science and Technology Planning Project of Sichuan Province [20GJHZ0167, 2021YFH0091]
The Z-scheme Ag/AgBr/BiOBr photocatalyst synthesized through photoreduction-precipitation method showed efficient degradation of organic pollutants under visible light, with a high electron-hole separation rate being the key factor for its enhanced performance. Mechanism analysis revealed that Ag nanoparticles act as suitable intermediates in the Z-scheme electron transfer pathway in the reaction system.
A Z-scheme Ag/AgBr/BiOBr photocatalyst was synthesized via photoreduction-precipitation method and the samples were characterised by X-ray diffraction, X-ray electron spectroscopy, transmission electron microscopy, and photoluminescence spectroscopy. Experiments on photodegradation of methyl orange (MO), toluene and ethylbenzene under visible light revealed that Ag/AgBr/BiOBr nanocomposites can effectively remove organics pollutant. The degradation rate of MO could reach 90.5% within 2 h, which is approximately 39 times more efficient than the photocatalytic action of BiOBr. The improvement of Ag/AgBr/BiOBr photocatalytic performance can be attributed to its high electron-hole separation rate. A mechanism analysis indicated that Ag nanoparticle is a suitable intermediate of Z-scheme electron transfer pathway in the reaction system.
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