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Fabrication of SubPc-Br/Ag3PO4 composites with high-efficiency and stable photocatalytic performance
Journal of Photochemistry and Photobiology A: Chemistry ( IF 4.1 ) Pub Date : 2020-09-22 , DOI: 10.1016/j.jphotochem.2020.112929
Zhuo Li , Bing Wang , Bing-Bing Zhang , Hai-Xia Ma , Jia Xue , Long Xu , Lin-Yu Jiao , Xiao-Xun Ma

Ag3PO4 has been proven to be an efficient photocatalyst to degrade organic pollutants in aqueous phase, which makes it a promising candidate for constructing an environmental purification system. In this study, novel series of subphthalocyanine-Br sensitized Ag3PO4 (SubPc-Br/Ag3PO4) photocatalysts with broadband light responsive ability were fabricated for the first time by coating SubPc-Br microcrystals onto the surface of Ag3PO4 bulk polyhedron. The obtained SubPc-Br/Ag3PO4 composites exhibited significant enhancement of photocatalytic efficiency in degrading bromophenol blue (BB) and methyl orange (MO) under both the visible-light and ultraviolet-light. It was shown that the weight percentage of SubPc-Br had a remarkable impact on the photocatalytic activities of the substrates and the 4 wt% SubPc-Br/Ag3PO4 composite displayed the most superior photocatalytic efficiency. The improved photocatalytic performance of SubPc-Br/Ag3PO4 photocatalysts could be mainly attributed to the sensitization, which broadened the absorption region and then improved the separation of photogenerated electron-hole pairs of Ag3PO4. Moreover, photo-induced electrons transfer between SubPc-Br and Ag3PO4 particles also decreased the possibility of Ag+ reduction, generating an enhanced cycling stability of SubPc-Br/Ag3PO4 photocatalysts.



中文翻译:

高效稳定光催化性能的SubPc-Br / Ag 3 PO 4复合材料的制备

已经证明,Ag 3 PO 4是降解水相中有机污染物的有效光催化剂,这使其成为构建环境净化系统的有希望的候选者。在这项研究中,通过将SubPc-Br微晶涂覆到Ag 3 PO的表面上,首次制备了具有宽带光响应能力的新型亚酞菁-Br敏化的Ag 3 PO 4(SubPc-Br / Ag 3 PO 4)光催化剂。4块多面体。所获得的SubPc-Br / Ag 3 PO 4在可见光和紫外光下,复合材料在降解溴酚蓝(BB)和甲基橙(MO)方面表现出显着的光催化效率增强。结果表明,SubPc-Br的重量百分比对底物的光催化活性有显着影响,4wt%的SubPc-Br / Ag 3 PO 4复合材料表现出最优异的光催化效率。SubPc-Br / Ag 3 PO 4光催化剂的光催化性能提高主要归因于敏化作用,它扩大了吸收区,进而改善了Ag 3 PO 4的光生电子-空穴对的分离。。此外,SubPc-Br和Ag 3 PO 4颗粒之间的光诱导电子转移也降低了Ag +还原的可能性,从而提高了SubPc-Br / Ag 3 PO 4光催化剂的循环稳定性。

更新日期:2020-09-28
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