期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 270, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118879
关键词
Broadband photocatalyst; NIR-responsive; Quantum dots; g-C3N4; Charge transfer
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) (Canadian Solar Inc.)
- Fonds de recherche du Quebec-Nature et technologies (FRQNT)
- China Scholarship Council (CSC) [201506220152]
- FRQNT [258513]
A heterojunction made of 0D near-infrared (NIR)-responsive PbS@CdS@ZnS core@shell@shell quantum dots (PCZ QDs) and 2D graphitic carbon nitride (g-C3N4) nanosheets was rationally constructed herein. In addition to some typical advantages of 0D/2D composites, such as short required charge-diffusion distance and high charge mobility, our designed PCZ QDs/g-C3N4 photocatalysts offer additional beneficial features. The broadband optical absorption of high-quality PCZ QDs highly dispersed on g-C3N4 nanosheets and their strong interaction yield efficient charge transfer between them and endow PCZ QDs/g-C3N4 with high photocatalytic activity from ultraviolet to NIR regions. With the optimized QDs loading level, the achieved, normalized rate constant is higher than the best-reported value for NIR-driven photocatalysis. PCZ QDs/g-C3N4 possesses good recycling performance and no metal release was detected in the solution after photocatalysis. This work highlights the great potential of QDs/g-C3N4 0D/2D photocatalysts in realizing high-efficiency broadband photocatalysis and functional optoelectronic devices for full solar spectrum exploitation.
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