Self-assembly induction of reduced graphene oxide decorated CdS nanoboxes for photocatalytic hydrogen evolution

Solar-driven photocatalytic hydrogen evolution promises a bright future in responding to energy issues and environmental emergencies. Herein, we report a reduced graphene oxide decorated CdS (rGO-CdS) photocatalyst with a hollow nanobox morphology and an electronic structure via a facile and effecti...

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Bibliographic Details
Published in:Sustainable energy & fuels 2022-07, Vol.6 (14), p.3477-3484
Main Authors: Li, Qiancheng, Ma, Di, Zhang, Xuetao, Lu, Qifang, Guo, Enyan, Wei, Mingzhi, Pang, Yingping
Format: Article
Language:English
Subjects:
Carrier transport
Charge transfer
Chemical energy
Electric fields
Electronic structure
Emergency response
Energy conversion
Evolution
Graphene
Hydrogen
Hydrogen evolution
Nanocomposites
Photocatalysis
Photocatalysts
Self-assembly
Solar energy
Space charge
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Summary:Solar-driven photocatalytic hydrogen evolution promises a bright future in responding to energy issues and environmental emergencies. Herein, we report a reduced graphene oxide decorated CdS (rGO-CdS) photocatalyst with a hollow nanobox morphology and an electronic structure via a facile and effective electrostatic self-assembly strategy for photocatalytic hydrogen evolution. Accordingly, with optimal rGO loading, the rGO-CdS-3 photocatalyst, benefiting from good visible-light harvesting ability, short carrier transport distance, and rich surface reactive sites, delivers a high photocatalytic hydrogen rate of 75.1 μmol h −1 with strong redox capability and favorable photostability. Meanwhile, the establishment of the built-in interface electric field and Coulomb interaction in the rGO-CdS-3 photocatalyst significantly facilitate the space charge separation and accelerate the interfacial charge migration and transfer, which is beneficial to the overall photocatalytic hydrogen evolution. Experimental results coupled with DFT calculations further confirm the interfacial charge migration route from CdS to rGO. This work opens valuable avenues for fabricating CdS-based nanocomposites for solar-to-chemical energy conversion. A highly efficient rGO decorated CdS hollow nanobox photocatalyst, taking advantage of remarkably long-lived reactive charges and built-in electric field, significantly promotes the photocatalytic H 2 evolution activity and stability.
ISSN:2398-4902
2398-4902
DOI:10.1039/d2se00616b