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UV-Light Promoted Formation of Boron Nitride-Fullerene Composite and Its Photodegradation Performance for Antibiotics under Visible Light Irradiation
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-11-19 , DOI: 10.1016/j.jhazmat.2020.124628
Yong Guo , Congcong Yan , Ying Guo , Xin Ji

A series of C60/BN composites have been synthesized, which can efficiently photodegrade TC under visible-light irradiation. Compared with C60/BN-D6 and C60/BN-V6 synthesized under dark and visible-light irradiation, C60/BN-U6 synthesized under UV-light irradiation has the largest adsorption and photodegradation performance for TC under visible-light irradiation. FTIR and XPS characterizations suggest that C60/BN composite is most likely the charge transfer composite, in which C60 acts as electron acceptor and BN acts as electron donor. UV-light has the best promotion effect for the formation of C60/BN. The adsorption quantity of TC by C60/BN-U6 is 2.77 times higher than that of BN (131.05 mg·g-1 vs. 47.27 mg·g-1), being due to that C60/BN-U6 has higher surface area than BN (135.7 m2·g-1 vs. 18.8 m2·g-1). The photodegradation of C60/BN-U6 for TC follows Z-scheme heterojunction mechanism, as well as the photo-induced ·O2- and h+ are the dominant photoactive species. Quantitative structure-activity relationship (QSAR) method is applied to evaluate the toxicity of TC and its photodegradation intermediates. The photodegradation rate of C60/BN-U6 for TC is 19.19 times, 10.06 times, 5.83 times, 2.73 times and 1.84 times higher than that of TiO2 (P25), g-C3N4, BNPA, BCNPA, and BN/TiO2, respectively, implying that C60/BN-U is a good metal-free photocatalyst.



中文翻译:

紫外光促进氮化硼-富勒烯复合物的形成及其在可见光照射下对抗生素的光降解性能

合成了一系列的C 60 / BN复合材料,它们可以在可见光照射下有效地降解TC。与在可见光下合成的C 60 / BN-D6和C 60 / BN-V6相比,在紫外光下合成的C 60 / BN-U6在可见光下对TC的吸附和光降解性能最大。 。FTIR和XPS表征表明C 60 / BN复合物很可能是电荷转移复合物,其中C 60充当电子受体,BN充当电子供体。紫外线对形成C 60 / BN具有最佳的促进作用。被C TC的吸附量60/ BN-U6是BN的2.77倍(131.05 mg·g -1 47.27 mg·g -1),这是因为C 60 / BN-U6的表面积大于BN(135.7 m 2 · g -1对18.8 m 2 ·g -1)。TC的C 60 / BN-U6的光降解遵循Z方案异质结机制,并且光诱导的·O 2-和h +是主要的光敏物质。采用定量构效关系(QSAR)方法评价了TC及其光降解中间体的毒性。C 60的光降解速率TC的/ BN-U6比TiO 2(P25),gC 3 N 4,BNPA,BCNPA和BN / TiO 2分别高19.19倍,10.06倍,5.83倍,2.73倍和1.84倍,这表明C 60 / BN-U是一种良好的无金属光催化剂。

更新日期:2020-11-19
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