Shang, Y., Liu, T., Chen, G. et al. (3 more authors) (2024) N,P co-doped carbon quantum dots bridge g-C3N4 and SnO2: Accelerating charge transport in S-scheme heterojunction for enhanced photocatalytic hydrogen production. Journal of Alloys and Compounds, 971. 172667. ISSN 0925-8388
Abstract
The preparation of photocatalysts with efficient electron-hole separation efficiency is the key to achieving sustainable utilization of solar energy. Herein, a three-phase composite of N,P co-doped carbon dots (NPCDs), SnO2 nanowires, and g-C3N4 nanotubes (CNNT) is synthesized, forming an S-scheme SnO2/NPCDs/CNNT heterojunction. The construction of S-scheme heterojunction not only improves the reduction ability due to band bending, but also promotes the separation of carriers. The conductive NPCDs are located between SnO2 and CNNT and formed as a unique charge transfer channel that accelerates carriers transfer between S-scheme heterojunction interfaces. Additionally, NPCDs serves as electron acceptors to receive electrons from the conduction band of CNNT, thereby further facilitating the carrier separation. This synergistically boosts the photocatalytic hydrogen production activity of SnO2/NPCDs/CNNT three-phase catalysts, leading to a high H2 yield (10.73 mmol·g-1·h-1) and outstanding cyclic stability. This study offers a strategy for designing heterostructure photocatalysts that enhanced charge separation through interface engineering.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 The Authors. |
Keywords: | g-C3N4 nanotubes; SnO2 nanowires; carbon quantum dots; Charge transport channel; S-scheme; Photocatalytic H2 production |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield) The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 30 Oct 2023 15:54 |
Last Modified: | 29 Oct 2024 15:12 |
Status: | Published |
Publisher: | Elsevier BV |
Refereed: | Yes |
Identification Number: | 10.1016/j.jallcom.2023.172667 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:204689 |