首页|Ultra-thin carbon bridged MoC quantum dots/g-C3N4 with charge-transfer-reaction highways for boosting photocatalytic hydrogen production
Ultra-thin carbon bridged MoC quantum dots/g-C3N4 with charge-transfer-reaction highways for boosting photocatalytic hydrogen production
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NSTL
Elsevier
? 2022 Elsevier B.V.Constructing heterojunction has been proved to be an efficient strategy for enhancing the photocatalytic performance of g-C3N4 by prohibiting charge recombination and providing surface active sites. Herein, a novel structure of ultra-thin carbon bridged MoC quantum dots/g-C3N4 nanosheets was constructed for the first time to facilitate carrier transfer and accelerate surface reactions. In our designed composites, a surface-to-surface contact has been formed between conductive carbon layer and g-C3N4 nanosheet via ultrasonic assembly process. Moreover, there exist strong interfaces between MoC QDs and carbon layer because of the in-situ conversion method. As to this unique structure, the ultra-thin carbon layer functions as charge separation and migration high ways while the MoC QDs perform as noble-metal-free co-catalysts consuming the surface electrons promptly. Significantly, an optimal 40 wt% MoC QDs-C/g-C3N4 photocatalyst (MCCN) is synthesized with a hydrogen evolution rate of 2989 μmol h?1 g?1, which is 69.6 and 1.7 times higher than that of pure g-C3N4 and Pt/g-C3N4, respectively. Our work provides new insights on designing highly efficient heterojunction photocatalysts for water splitting.
Electron transfer bridgeG-C3N4 nanosheetsHeterojunctionsMoC quantum dotsPhotocatalytic H2 production
Cui C.、Zhang G.、Yang Y.、Wu T.、Wang L.
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Key Laboratory of Eco-chemical Engineering International Cooperation Base of Eco-chemical Engineering and Intelligent Manufacturing Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology Qingdao University of S
NSTL
Elsevier
