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Synthesis of Leaf‐Vein‐Like g‐C 3 N 4 with Tunable Band Structures and Charge Transfer Properties for Selective Photocatalytic H 2 O 2 Evolution
Author(s) -
Feng Chengyang,
Tang Lin,
Deng Yaocheng,
Wang Jiajia,
Luo Jun,
Liu Yani,
Ouyang Xilian,
Yang Haoran,
Yu Jiangfang,
Wang Jingjing
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202001922
Subject(s) - photocatalysis , materials science , quantum yield , electron transfer , doping , yield (engineering) , quantum efficiency , charge (physics) , anthraquinone , nanotechnology , photochemistry , chemical engineering , catalysis , optoelectronics , organic chemistry , optics , chemistry , physics , composite material , quantum mechanics , fluorescence , engineering
Abstract Photocatalytic H 2 O 2 evolution through two‐electron oxygen reduction has attracted wide attention as an environmentally friendly strategy compared with the traditional anthraquinone or electrocatalytic method. Herein, a biomimetic leaf‐vein‐like g‐C 3 N 4 as an efficient photocatalyst for H 2 O 2 evolution is reported, which owns tenable band structure, optimized charge transfer, and selective two‐electron O 2 reduction. The mechanism for the regulation of band structure and charge transfer is well studied by combining experiments and theoretical calculations. The H 2 O 2 yield of CN4 (287 µmol h −1 ) is about 3.3 times higher than that of pristine CN (87 µmol h −1 ), and the apparent quantum yield for H 2 O 2 evolution over CN4 reaches 27.8% at 420 nm, which is much higher than that for many other current photocatalysts. This work not only provides a novel strategy for the design of photocatalyst with excellent H 2 O 2 evolution efficiency, but also promotes deep understanding for the role of defect and doping sites on photocatalytic activity.