Issue 1, 2022

Construction of brown mesoporous carbon nitride with a wide spectral response for high performance photocatalytic H2 evolution

Abstract

Two-dimensional graphitic carbon nitride (2D CN) shows superior photocatalytic performance due to high charge separation efficiency and the rich active sites endowed with a 2D structure. However, the 2D structure also induces the weaknesses of easier agglomeration and wider bandgap which can weaken the H2 evolution capacity. Aiming to solve these defects, we prepared a brown mesoporous carbon nitride photocatalyst through phosphorus doping (BMCN). The phosphorus doping brings an excellent visible light response, a stable mesoporous structure with rich active sites, and a more negative CB potential. The optimized BMCN-50 shows a high H2 evolution rate of 2.7 mmol g−1 h−1 which is over 5 times than that of pure 2D CN. The apparent quantum yields (AQYs) of BMCN-50 at 420 nm, 435 nm, 450 nm, and 550 nm are 4.2%, 4.0%, 3.6%, and 0.5%, respectively, which are higher than those of 2D CN (3.2%, 0.9%, 0.2%, and 0%). Besides, BMCN showed stable H2 evolution performance even after being immersed in 10% TEOA solution for three months. This work presents an easy strategy to prepare a wide spectral response carbon nitride photocatalyst with a stable mesoporous nanostructure for more efficient photocatalytic H2 evolution reaction.

Graphical abstract: Construction of brown mesoporous carbon nitride with a wide spectral response for high performance photocatalytic H2 evolution

Supplementary files

Article information

Article type
Research Article
Submitted
09 sep 2021
Accepted
03 nov 2021
First published
08 nov 2021

Inorg. Chem. Front., 2022,9, 103-110

Construction of brown mesoporous carbon nitride with a wide spectral response for high performance photocatalytic H2 evolution

J. Chen, X. Zhu, Z. Jiang, W. Zhang, H. Ji, X. Zhu, Y. Song, Z. Mo, H. Li and H. Xu, Inorg. Chem. Front., 2022, 9, 103 DOI: 10.1039/D1QI01137E

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