Growth of narrow-bandgap Cl-doped carbon nitride nanofibers on carbon nitride nanosheets for high-efficiency photocatalytic H2O2 generation

Tingshuo Ji; Yanzhen Guo; Huili Liu; Binbin Chang; Xuefeng Wei; Baocheng Yang

doi:10.1039/d1ra05787a

Growth of narrow-bandgap Cl-doped carbon nitride nanofibers on carbon nitride nanosheets for high-efficiency photocatalytic H₂O₂ generation

RSC Adv. 2021 Sep 22;11(50):31385-31394. doi: 10.1039/d1ra05787a. eCollection 2021 Sep 21.

Authors

Tingshuo Ji¹, Yanzhen Guo², Huili Liu², Binbin Chang², Xuefeng Wei¹, Baocheng Yang²

Affiliations

¹ College of Chemical Engineering & Pharmaceutics, Henan University of Science and Technology Luoyang 471023 PR China.
² Henan Provincial Key Laboratory of Nanocomposites and Applications, Institute of Nanostructured Functional Materials, Huanghe Science and Technology College Zhengzhou 450006 China baochengyang@infm.hhstu.edu.cn.

Abstract

Heterojunction construction has been proved to be an effective way to enhance photocatalysis performance. In this work, Cl-doped carbon nitride nanofibers (Cl-CNF) with broadband light harvesting capacity were in situ grown on carbon nitride nanosheets (CNS) by a facile hydrothermal method to construct a type II heterojunction. Benefiting from the joint effect of the improved charge carriers separation efficiency and a broadened visible light absorption range, the optimal heterostructure of Cl-CNF/CNS exhibits a H₂O₂ evolution rate of 247.5 μmol g^-1 h^-1 under visible light irradiation, which is 3.4 and 3.1 times as much as those of Cl-CNF (72.2 μmol g^-1 h^-1) and CNS (80.2 μmol g^-1 h^-1), respectively. Particularly, the heterojunction nanostructure displays an apparent quantum efficiency of 23.67% at 420 nm. Photoluminescence spectra and photocurrent measurements both verified the enhanced charge carriers separation ability. Our work provides a green and environmentally friendly strategy for H₂O₂ production by elaborate nanostructure design.