期刊
CHEMICAL ENGINEERING JOURNAL
卷 331, 期 -, 页码 615-625出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.08.131
关键词
Like-Z-scheme structure; CdS/Fe3O4/g-C3N4; Excellent photo-electron transfer ability; Antibiotics degradation; Universal photocatalytic performance
资金
- National Natural Science Foundation of China [U1662125, 21546013, 21606114]
- Natural Science Foundation of Jiangsu Province [BK20150536]
- China Postdoctoral Science Foundation [2015M571683, 1501102B, 2016M590418]
- Postgraduate Innovation Programs Foundation of Jiangsu Province [KYCX17_1794]
A novel efficient magnetic oxidation-reduction like-Z-scheme structure photocatalyst composed of g-C3N4, CdS and the oxidation-reduction mediators of Fe3O4 is successfully synthesized by heat treatment methods. The like-Z- scheme CdS/Fe3O4/g-C3N4 photocatalyst exhibits universal degradation property on removing kinds of antibiotics, and the photocatalytic activity is better than that of CdS/g-C3N4 and pure g-C3N4. The excellent photocatalytic performance is originated from the unique like-Z-scheme structure and oxidation-reduction function of Fe3O4, which effectively separates the hole-electron and sufficiently utilizes the photogenerated carriers for generating more active radicals. The results showed that when the content of Fe3O4 is 10%, the CdS/Fe3O4/gC(3)N(4) exhibited superior activity. The best degradation rate constant K in the like-Z-scheme photocatalyst is approximately 26 times of pure g-C3N4. The important role of Fe3O4 and the photocatalytic mechanism are also discussed in detail. This work not only puts forward a novel design idea of the like-Z-scheme material, but also is expected to be widely applied to the universal removal of kinds of antibiotics according to the practical requirement.
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