Metal-free 2D/2D heterostructured photocatalyst of black phosphorus/covalent triazine-based frameworks for water splitting and pollutant degradation

The design of metal-free photocatalysts has drawn considerable attention in photocatalysis due to the merits of low cost, sustainability, and recyclability without releasing toxic metals from photocorrosion. As an emerging metal-free photocatalyst, the covalent triazine-based framework (CTF) has sti...

Full description

Saved in:
Bibliographic Details
Published in:Sustainable energy & fuels 2020-07, Vol.4 (7), p.3739-3746
Main Authors: Zheng, Yun, Chen, Yilin, Wang, Lvting, Tan, Mingyue, Xiao, Yingying, Gao, Bifen, Lin, Bizhou
Format: Article
Language:English
Subjects:
Charge efficiency
Chemical energy
Current carriers
Electromagnetic absorption
Energy conversion
Environmental degradation
Hydrogen evolution
Light
Metals
Oxidation
Phosphorus
Photocatalysis
Photocatalysts
Photochemicals
Pollutants
Recyclability
Rhodamine
Separation
Solar energy
Splitting
Sustainability
Sustainable harvest
Triazine
Water pollution
Water splitting
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The design of metal-free photocatalysts has drawn considerable attention in photocatalysis due to the merits of low cost, sustainability, and recyclability without releasing toxic metals from photocorrosion. As an emerging metal-free photocatalyst, the covalent triazine-based framework (CTF) has stimulated great research interest in photochemical water splitting. Nevertheless, the poor separation efficiency of photogenerated charge carriers and limited light absorption ability of the CTF hinders its photocatalytic performance. Herein, a metal-free 2D/2D heterostructured photocatalyst composed of black phosphorus (BP) and a CTF is prepared by a facile liquid exfoliation approach and applied to photocatalytic water splitting and pollutant degradation. Compared to the CTF, the BP/CTF photocatalyst exhibits a two-fold increase in the hydrogen evolution rate and a nine-fold increase in the degradation rate constant of rhodamine B (RhB) with visible light illumination, mainly due to the enhanced photoinduced charge carrier separation and strengthened visible light harvesting ability. This work provides sustainable approaches for the synthesis and construction of highly-reactive and metal-free photocatalysts for solar-to-chemical energy conversion. Metal-free 2D/2D heterostructured photocatalysts of black phosphorus/covalent triazine-based frameworks are constructed for water splitting and pollutant degradation.
ISSN:2398-4902
2398-4902
DOI:10.1039/d0se00394h