Oxygenated monolayer carbon nitride for excellent photocatalytic hydrogen evolution and external quantum efficiency

被引：406

作者：

Sh, Xiaojie ^{[1
]}

Wu, Jingjie ^{[2
]}

Zhong, Jun ^{[3
]}

Xu, Hui ^{[1
,2
]}

Yang, Yingchao ^{[2
]}

Vajtai, Robert ^{[2
]}

Lou, Jun ^{[2
]}

Liu, Yang ^{[2
]}

Du, Daolin ^{[1
]}

Li, Huaming ^{[1
]}

Ajayan, Pulickel M. ^{[2
]}

机构：

[1] Jiangsu Univ, Inst Energy Res, Sch Environm & Safety Engn, Zhenjiang 212013, Peoples R China

[2] Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA

[3] Soochow Univ, Inst Funct Nano & Soft Mat, Suzhou 215123, Peoples R China

来源：

NANO ENERGY | 2016年 / 27卷

基金：

中国国家自然科学基金;

关键词：

O-g-C3N4; Monolayer; Photocatalytic hydrogen evolution; External quantum efficiency; DOPED G-C3N4; GRAPHENE; NANOSHEETS; WATER; MICROSTRUCTURES; EXFOLIATION; ABSORPTION; ENERGY;

D O I：

10.1016/j.nanoen.2016.06.042

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：

Oxygen-modified monolayer g-C3N4 materials (abbreviated as O-g-C3N4) with high crystallinity in a high yield are prepared via thermal oxidation. The partial oxygenation of g-C3N4 was simultaneously achieved, providing the opportunity to collaboratively affect both structure and electron for photocatalytic hydrogen evolution. The O-g-C3N4 monolayer exhibited a production rate of similar to 44.37 mmol/g (similar to 8874.7 mu mol/h g) for hydrogen evolution leading to the highest external quantum efficiency (EQE) of 13.7% (at 420 nm) of the reported g-C3N4 nanosheets in a 5 h duration under visible light irradiation. More promisingly, the photocatalytic reaction proceeded for more than 25 h without performance degradation. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：138 / 146

页数：9

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