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Synergy between nitrogen, phosphorus co-doped carbon quantum dots and ZnO nanorods for enhanced hydrogen production

Yashwanth, HJ and Rondiya, SR and Eya, HI and Dzade, NZ and Phase, DM and Dhole, SD and Hareesh, K (2023) Synergy between nitrogen, phosphorus co-doped carbon quantum dots and ZnO nanorods for enhanced hydrogen production. In: Journal of Alloys and Compounds, 937 .

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Official URL: https://doi.org/10.1016/j.jallcom.2022.168397


We report a facile synthesis of nitrogen and phosphorus co-doped carbon quantum dots (NPCQDs) anchored on ZnO nanorods to form NPCQDs/ZnO (NPCZ) nanohybrid as efficient and robust photocatalysts for light-driven hydrogen production. The synthesized NPCZ catalyst exhibited improvement in hydrogen production of 417 μmolh−1g−1 under visible light compared to nitrogen doped CQDs/ZnO (NCZ), phosphorus doped CQDs/ZnO (PCZ) and CQDs/ZnO (CZ) nanohybrid photocatalysts. The synergistic interactions between NPCQDs and ZnO nanorods give rise to the formation of additional energy levels, decrease in recombination rate and increase in decay lifetime of photo-generated electron hole pairs, reduced work function, thus the eventual improved hydrogen generation performance in visible region. Further, the experimentally obtained results are consistently corroborated by the first principles Density Functional Theory (DFT), revealing the decrease in bandgap as well as work function and improvement in density of states (DOS) of NPCZ photocatalyst. © 2022 Elsevier B.V.

Item Type: Journal Article
Publication: Journal of Alloys and Compounds
Publisher: Elsevier Ltd
Additional Information: The copyright for this article belongs to Elsevier
Keywords: CQDs; DFT; Hydrogen generation; ZnO nanorods
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 16 Jan 2023 07:04
Last Modified: 16 Jan 2023 07:04
URI: https://eprints.iisc.ac.in/id/eprint/79175

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