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Facile band alignment of C3N4/CdS/MoS2 sandwich hybrid for efficient charge separation and high photochemical performance under visible-light.
- Source :
-
Powder Technology . Jun2019, Vol. 351, p222-228. 7p. - Publication Year :
- 2019
-
Abstract
- C 3 N 4 is a promising visible-light-driven photocatalyst with superior chemical stability and photostability. The intrinsic problem associated with its use is that recombination of photogenerated electron-hole pairs slows down the industrial process. We designed novel C 3 N 4 /CdS/MoS 2 sandwich hybrids to increase the carrier utilization efficiency according to well-matched band alignment. The smart arrangement of C 3 N 4 -CdS-MoS 2 led to step-by-step electron/hole pair separation. Meanwhile, the conductive layer MoS 2 supported the easy surface transfer of electrons. The higher coefficient of separation and transfer results in a more effective reduction of electron/hole pair recombination compared to previous work. The Rhodamine B (RhB) photodegradation rate constant for the hybrids is considerably enhanced compared to pure C 3 N 4 , from 0.0309 to 0.0533 min−1. The strategy of loading separation/transfer bifunctional cocatalysts can be widely used to maximize the solar utilization efficiency of other photocatalysts. Unlabelled Image • A novel ternary C 3 N 4 /CdS/MoS 2 sandwich structure has been designed and synthesized. • The visible light driven degradation of RhB over C 3 N 4 /CdS/MoS 2 was studied. • The step-by-step charge transfer mechanism on C 3 N 4 /CdS/MoS 2 was proposed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00325910
- Volume :
- 351
- Database :
- Academic Search Index
- Journal :
- Powder Technology
- Publication Type :
- Academic Journal
- Accession number :
- 136690696
- Full Text :
- https://doi.org/10.1016/j.powtec.2019.03.043