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Short‐time Thermal Oxidation of Ultrathin and Broadband Carbon Nitride for Efficient Photocatalytic H 2 Generation
Author(s) -
Mo Zhao,
She Xiaojie,
Chen Zhigang,
Xu Fan,
Song Yanhua,
Zhu Xingwang,
Qian Junchao,
Li Huaming,
Lei Yucheng,
Xu Hui
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201901533
Subject(s) - photocatalysis , materials science , carbon nitride , absorption (acoustics) , nitride , graphitic carbon nitride , irradiation , carbon fibers , visible spectrum , chemical engineering , thermal treatment , nanotechnology , optoelectronics , photochemistry , chemistry , composite number , layer (electronics) , catalysis , composite material , organic chemistry , physics , nuclear physics , engineering
Broadband light absorption and excellent charge separation/migration efficiency are two important indicators for promising photocatalyst. However, realizing the above two aspects simultaneously is still a challenge. Here, an ultrathin and broadband carbon nitride (UBCN) is synthesized via a short‐time thermal oxidation process. The as‐prepared UBCN exhibits outstanding photocatalytic H 2 generation activity (240.60 μmol h −1 ) under irradiation with λ>400 nm. Moreover, UBCN can work under irradiation with a longer wavelength (λ>500 nm), the corresponding H 2 evolution rate is 5.08 μmol h −1 , which is 14.8 times higher than that of bulk carbon nitride (Bulk CN). The excellent photocatalytic performance should be credited to the efficient charge separation/migration (the ultrathin structure) and the extended light absorption range. This work provides a simple and convenient strategy to prepare broadband and ultrathin metal‐free photocatalytic materials.