Bandgap-tunable phosphorus-doped monolayer graphene with enhanced visible-light photocatalytic H2-production activity. Issue 34 (19th August 2019)

• Record Type: Journal Article
• Authors: Wu, Yujun; Cao, Chuanbao; Qiao, Chen; Wu, Yu; Yang, Lifen; Younas, Waqar
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 34(2019)
• Page Start: 10613
• Page End: 10622
• Publication Date: 2019-08-19
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc03539g
• Languages: English
• ISSNs: 2050-7526

Abstract

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. 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.