Surface N modified 2D g-C3N4 nanosheets derived from DMF for photocatalytic H2 evolution

被引:39
作者
Hao, Quanguo [1 ]
Song, Yanhua [2 ]
Ji, Haiyan [1 ]
Mo, Zhao [1 ]
She, Xiaojie [1 ]
Deng, Jiujun [1 ]
Muhmood, Tahir [3 ]
Wu, Xiangyang [1 ]
Yuan, Shouqi [1 ]
Xu, Hui [1 ]
Li, Huaming [1 ]
机构
[1] Jiangsu Univ, Inst Energy Res, Sch Environm & Safety Engn, Zhenjiang 212013, Peoples R China
[2] Jiangsu Univ Sci & Technol, Sch Environm & Chem Engn, Zhenjiang 212013, Peoples R China
[3] Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
Surface nitrogen modified; 2D g-C3N4 nanosheets; Hydrogen evolution; Photocatalysis; GRAPHITIC CARBON NITRIDE; FACILE SYNTHESIS; HYDROGEN EVOLUTION; WATER; REDUCTION; CATALYSTS; COMPOSITE; OXIDATION; POLYMERS;
D O I
10.1016/j.apsusc.2018.07.154
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
The two-dimensional graphitic carbon nitride (2D g-C3N4) shows excellent photocatalytic performance due to its graphene-like structure, unique electronic and optical property. However, the 2D g-C3N4 suffers from lower visible light utilization because of the quantum size effect. Herein, a new approach was developed to prepare the surface nitrogen modified 2D g-C3N4 nanosheets (NCNS) through a facile hydrothermal treatment route. The asobtained NCNS exhibited a high hydrogen evolution rate of 19.8 mmol h(-1)g(-1) with a turnover number (TON) of 642.39 in 5 h, and the external quantum efficiency (EQE) of 10.7% at 420 nm was superior to the g-C3N4 different morphological regulation. The surface nitrogen modification prompted electron delocalization of two-dimensional electron system, leading to accelerating photon-generated carrier separation and transportation efficiency.
引用
收藏
页码:845 / 852
页数:8
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