光催化
材料科学
降级(电信)
异质结
化学工程
辐照
石墨烯
光化学
兴奋剂
纳米技术
催化作用
化学
光电子学
有机化学
物理
电信
工程类
核物理学
计算机科学
作者
Oumaima Mertah,Almudena Gómez-Avilés,Amine Slassi,Abdelhak Kherbeche,Carolina Belver,Jorge Bedia
标识
DOI:10.1016/j.catcom.2023.106611
摘要
This work describes a successful approach to dope copper sulfide with different amounts of Co2+ ions and combine it with TiO2 through a simple one-step hydrothermal process. Compared with the bare CuS, the synthesized [email protected]2 heterostructures promote charge transport and restrict the recombination of photoexcited electrons and holes. The intrinsic properties of [email protected]2 samples are systematically examined through experimental characterizations and density functional theory (DFT) theoretical calculations. Photocatalytic degradation tests under simulated solar light irradiation were performed using sulfamethoxazole degradation as a model emerging persistent antibiotic. The photocatalytic performance was enhanced after cobalt doping, and the heterostructure doped with 3% of Co exhibited the best degradation with an apparent rate constant of 0.0216 min−1. This sample also showed a much faster settling than bare TiO2, which indicates a much easier separation of the reaction media after being used. The enhancement of degradation is attributed to the increased light absorption and the more efficient charge transfer and separation. The plausible photocatalytic degradation mechanism of sulfamethoxazole was also proposed. This study presents a novel strategy to prepare potential photocatalysts for the elimination of emerging pollutants.
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