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Bandgap-tunable phosphorus-doped monolayer graphene with enhanced visible-light photocatalytic H2-production activity

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Abstract

Graphene-based materials hold great promise in future applications due to their phenomenal properties; however, the lack of a suitable bandgap severely limits their practical applications. Therefore, exploring a useful way for tuning the bandgap of graphene is extremely important. To date, it is still a great challenge to modulate the bandgap of a monolayer graphene. Herein, we prepared a novel phosphorus-doped monolayer graphene with a tunable bandgap via a facile one-step synthesis strategy, where the bandgaps varied with the amount of phosphorus. Subsequently, the four-probe and Hall effect measurements successfully revealed the semiconductor characteristics of the phosphorus-doped monolayer graphene. When used as a photocatalyst material for water splitting without a cocatalyst, the phosphorus-doped monolayer graphene exhibited a high rate of H2 production (up to 672.3 μmol h−1 g−1) and excellent stability. The high photocatalytic H2-production activity benefited from the suitable bandgap (1.79 eV) and sufficient visible-light absorption capacity for the sample. Briefly, our study provides an effective way to synthesize a new type of photocatalysts based on a phosphorus-doped monolayer graphene with a tunable bandgap.

Graphical abstract: Bandgap-tunable phosphorus-doped monolayer graphene with enhanced visible-light photocatalytic H2-production activity

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Publication details

The article was received on 01 Jul 2019, accepted on 01 Aug 2019 and first published on 05 Aug 2019


Article type: Paper
DOI: 10.1039/C9TC03539G
J. Mater. Chem. C, 2019, Advance Article

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    Bandgap-tunable phosphorus-doped monolayer graphene with enhanced visible-light photocatalytic H2-production activity

    Y. Wu, C. Cao, C. Qiao, Y. Wu, L. Yang and W. Younas, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C9TC03539G

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