期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 618, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.126444
关键词
SnS2; RGO; BiOBr; Z-scheme; Visible-light irradiation; Photodegradation
The 0.2SnS2/RGO/BiOBr composite showed the best performance, with a 99.15% methylene blue removal rate after 15 minutes irradiation, a 38.9% improvement compared to pure BiOBr. Additionally, the degradation rate of norfloxacin reached 81.6%.
Constructing efficient and green photocatalysts to remove organic pollutants is of great significance to environmental purification. We used the facile one-pot hydrothermal method to couple lamellar SnS2 with RGO and BiOBr to synthesize a novel Z-scheme SnS2/RGO/BiOBr ternary photocatalyst. Compared with the single component, the obtained ternary composite material has enhanced photodegradation activity.It can be concluded that the 0.2SnS2/RGO/BiOBr composite exhibits the best performance, 99.15% methylene blue removed after 15 min irradiation,reaching a 38.9% improvement compared to the pure BiOBr. Besides, the degradation rate of norfloxacin reached 81.6%. The excellent photocatalytic properties were studied by photoluminescence spectroscopy, and a Z-scheme charge transfer mechanism appropriate for SnS2/RGO/BiOBr composite was proposed according to the results of UV?vis diffuse reflectance spectroscopy and free radical capture experiments, in which RGO acted as an electron transfer medium to accelerate the transfer of photogenerated electrons between SnS2 and BiOBr, thereby effectively limiting the recombination of photogenerated carriers.
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