Hydrogen bonds in heterojunction photocatalysts for efficient charge transfer

被引：48

作者：

Jin, Zhengyuan ^{[1
,2
,3
]}

Zhang, Qitao ^{[3
]}

Chen, Jiaqi ^{[1
]}

Huang, Shaolong ^{[1
]}

Hu, Liang ^{[1
]}

Zeng, Yu-Jia ^{[1
]}

Zhang, Han ^{[3
]}

Ruan, Shuangchen ^{[1
]}

Ohno, Teruhisa ^{[2
]}

机构：

[1] Shenzhen Univ, Shenzhen Key Lab Laser Engn, Coll Optoelect Engn, Shenzhen 518060, Peoples R China

[2] Kyushu Inst Technol, Fac Engn, Dept Appl Chem, 1-1 Sensuicho, Kitakyushu, Fukuoka 8048550, Japan

[3] Shenzhen Univ, Coll Optoelect Engn, Int Collaborat Lab Mat Optoelect Sci & Technol 2D, Shenzhen 518060, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2018年 / 234卷

基金：

中国国家自然科学基金;

关键词：

Graphitic carbon nitride; Melamine cyanurate; Hydrogen bond; Charge transfer; Photocatalysis; SOLID-STATE NMR; VISIBLE-LIGHT; CARBON NITRIDE; MELAMINE; CONVERSION; OXIDATION; SHEETS; ENERGY; OXIDE;

D O I：

10.1016/j.apcatb.2018.04.057

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A hydrogen bond-based heterojunction photocatalyst, g-C3N4/melamine-cyanurate (gMC), was synthesized by a facile alkaline hydrothermal approach. The hydrogen bonds between the two substrates (N-HO=C) provide not only an ultrafast pathway (hundreds of femtoseconds) but also an inner electric field for hole transfer from C3N4 to melamine-cyanurate. Although only the g-C3N4 moiety acts as a photocatalyst, the optimized composite presents approximately 5.4, 3 and 2.5 times higher photocatalytic activity than bulk g-C3N4 in the decomposition of acetaldehyde and 2-propanol and the generation of H-2 by water splitting, respectively. In this paper, we demonstrate that hydrogen bonds can not only lower the interfacial barrier and separate redox sides but also control the direction of charge transfer, which enables the design of the photocatalytic mechanism.

引用

页码：198 / 205

页数：8

共 28 条

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