Bifunctional black phosphorus: coupling with hematite for Z-scheme photocatalytic overall water splitting. Issue 2 (26th November 2020)

• Record Type: Journal Article
• Authors: Wang, Ming; Li, Di; Zhao, Yong; Shen, Hao; Chen, Biyi; Wu, Xiaojie; Qiao, Xiaolei; Shi, Weidong
• Is Part Of: Catalysis science & technology. Volume 11:Issue 2(2021)
• Page Start: 681
• Page End: 688
• Publication Date: 2020-11-26
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/d0cy01743d
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : Z-scheme 2D–2D BP/α-Fe2 O3 heterostructure enables preferable photocatalytic properties for efficient overall water splitting under visible light. Abstract : Z-Scheme photocatalytic overall water splitting based on an oxygen production photocatalyst (OPP) and a hydrogen production photocatalyst (HPP) provides a promising opportunity for the conversion of solar energy into chemical energy. Herein, a novel all solid-state 2D–2D Z-scheme photocatalytic system is designed and constructed by coupling black phosphorus nanosheets (2D BP) with α-Fe2 O3 nanoplates. 2D BP is used as an HPP and solid-state charge transfer mediator to produce H2 and accelerate charge transfer, while α-Fe2 O3 serves as an OPP. The introduction of 2D BP as solid-state charge transfer mediator promotes the carrier transfer, thus simultaneously realizing efficient H2 and O2 evolution. The optimum O2 and H2 evolution rates on this Z-scheme system are approximately 0.29 and 0.59 μmol h −1, respectively, under simulated visible light illumination without using sacrificial agents. This study suggests the significance of a solid charge transfer mediator to accelerate the migration and separation of interface charges, thus improving the photocatalytic overall water splitting performance.