期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 604, 期 -, 页码 198-207出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.07.030
关键词
Graphitic carbon nitride; Titania; Copper sulfide; Ternary nanohybrid; Photocatalyst
资金
- Natural Science Foundation of Gansu Province [20JR5RA220, 20JR5RA214]
- National Natural Science Foundation of China [51602138]
The CuS-TiO2-g-CN photocatalyst has been developed with efficient charge transfer and broad spectrum response capabilities. It exhibits significantly higher photocatalytic activity and stability for degrading RhB under visible light irradiation compared to g-CN and TiO2-g-CN.
Advanced photocatalyst is a key for photocatalytic water purification in the environmental pollutant remediation. In this study, graphitic carbon nitride (g-CN) modified by CuS and TiO2 ternary nanohybrid (CuS-TiO2-g-CN) with close interfacial contact among CuS, TiO2 and g-CN was fabricated through a facile and green method. Compared to the binary g-CN-based counterparts, the CuS-TiO2-g-CN possesses multiple photo-generated charge transfers owing to the synergistic action of CuS, TiO2 and g-CN. And hence the separation efficiency of photo-generated electron-hole pairs can be improved for the CuS-TiO2-g-CN. The optical and photoelectrochemical measurements prove that the CuS-TiO2-g-CN has narrower band gap energy and higher transient photocurrent density than those of g-CN and TiO2-g-CN. Therefore, the CuS-TiO2-g-CN shows notably higher photocatalytic activity and stability towards the degradation of Rhodamine B (RhB) than g-CN and TiO2-g-CN under visible-light irradiation. Moreover, a possible visible-light photocatalytic mechanism of CuS-TiO2-g-CN for degrading RhB was also proposed on the basis of the experimental results and literature reports. (c) 2021 Elsevier Inc. All rights reserved.
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