Tuning the Photoluminescence of Graphene Quantum Dots by Photochemical Doping with Nitrogen

被引：39
|
作者：
Xu, Xiaofen [1 ]
Gao, Fuhua [1 ]
Bai, Xiaohua [1 ]
Liu, Fuchi [1 ]
Kong, Wenjie [1 ]
Li, Ming [2 ]
机构：
[1] Guangxi Normal Univ, Coll Phys & Technol, Guilin 541004, Peoples R China
[2] Guilin Univ Technol, Coll Sci, Guilin 541004, Peoples R China
来源：
MATERIALS | 2017年 / 10卷 / 11期
基金：
中国国家自然科学基金;
关键词：
graphene quantum dots; nitrogen-doped graphene quantum dots; photochemical doping; photoluminescence; blue-shift; FUNCTIONAL-GROUPS; DEPENDENT PHOTOLUMINESCENCE; OXYGEN; OXIDE; CARBON; BLUE; ENHANCEMENT; SHEETS; IONS; SIZE;
D O I：
10.3390/ma10111328
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：
Nitrogen-doped graphene quantum dots (NGQDs) were synthesized by irradiating graphene quantum dots (GQDs) in an NH3 atmosphere. The photoluminescence (PL) properties of the GQDs and the NGQDs samples were investigated. Compared with GQDs, a clear PL blue-shift of NGQDs could be achieved by regulating the irradiating time. The NGQDs obtained by irradiation of GQDs for 70 min had a high N content of 15.34 at % and a PL blue-shift of about 47 nm. This may be due to the fact that photochemical doping of GQDs with nitrogen can significantly enhance the contents of pyridine-like nitrogen, and also effectively decrease the contents of oxygen functional groups of NGQDs, thus leading to the observed obvious PL blue-shift.
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页数：9
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