Production of pristine graphene quantum dots from graphite by a shear-mixer in supercritical CO2

被引：13
作者：
Alidad, Farnaz [1 ]
Navik, Rahul [1 ]
Gai, Yanzhe [1 ]
Zhao, Yaping [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, 800 Dong Chuan Rd, Shanghai 200240, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2018年 / 710卷
基金：
中国国家自然科学基金;
关键词：
Graphene quantum dots; Supercritical CO2 exfoliation; Shear mixer; Graphite; HIGH-YIELD; GREEN; WATER; SIZE; FABRICATION; DELIVERY; ARRAYS; OXIDE;
D O I：
10.1016/j.cplett.2018.08.073
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：
Graphene quantum dots exhibit unique electronic and optical properties due to their combined properties of quantum confinements and edge effects and have broad applications like bio-imaging, drug delivery, biosensors and photovoltaic applications. In this paper, we presented a facile and green preparation of pristine graphene quantum dots (PGQDs) from graphite using a shear-assisted supercritical CO2 approach. The effects of the pressure, graphite amount, and shearing speed on the yield of the PGQDs were investigated. The fluorescence quantum yield of the PGQDs achieved 8.6%, and it was highly stable with blue light emission. The mechanism for forming the PGQDs was elucidated.
引用
收藏
页码：64 / 69
页数：6
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