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Black phosphorus: an efficient co-catalyst for charge separation and enhanced photocatalytic hydrogen evolution

Author:
Wu, Jiahao, Huang, Shaolong, Jin, Zhengyuan, Chen, Jiaqi, Hu, Liang, Long, Yaojia, Lu, Jianguo, Ruan, Shuangchen, Zeng, Yu-Jia
Source:
Journal of materials science 2018 v.53 no.24 pp. 16557-16566
ISSN:
0022-2461
Subject:
graphene, hydrogen production, irradiation, lighting, liquids, phosphorus, photocatalysis, photocatalysts, semiconductors, titanium dioxide, ultrasonics
Abstract:
Black phosphorus (BP), a phosphorus analog of graphene, is a two-dimensional material with the thickness-dependent bandgap and a high carrier mobility, which emerges as a promising material in nanoelectronics and optoelectronics. In this study, BP loaded with surface hydroxyl has been prepared by liquid ultrasonic exfoliation and used as the co-catalyst, which results in 341% photocatalytic hydrogen evolution enhancement to the anatase TiO₂ under the simulated sunlight irradiation and a quantum efficiency as high as 18.23% at 365 nm. The improved photocatalytic activity has been ascribed to the Z-scheme mechanism. These results indicate that 2D surface hydroxyl-loaded BP can be used as a broadband photocatalyst by forming type II heterostructures with other wide-bandgap semiconductors.
Agid:
6141872