Near-UV-emitting graphene quantum dots from graphene hydrogels

被引：28
作者：
Qin, Hongyi [1 ]
Gong, Tao [1 ]
Jin, Yinhua [1 ]
Cho, Yujin [2 ]
Shin, Cheolmin [2 ]
Lee, Changgu [1 ,2 ]
Kim, Taesung [1 ,2 ]
机构：
[1] Sungkyunkwan Univ, SAINT, Suwon 440746, South Korea
[2] Sungkyunkwan Univ, Sch Mech Engn, Suwon 440746, South Korea
来源：
CARBON | 2015年 / 94卷
基金：
新加坡国家研究基金会;
关键词：
AROMATIC-HYDROCARBON CATIONS; INFRARED-SPECTROSCOPY; PHOTOLUMINESCENCE; FLUORESCENCE; SHEETS; AVENUE; OXIDE;
D O I：
10.1016/j.carbon.2015.06.033
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：
We report a novel method to prepare graphene quantum dots (GQDs) from graphene hydrogels. Graphene hydrogels were prepared using a hydrothermal technique, and GQDs were released from the hydrogels on immersion of the hydrogels in low-polarity organic solvents. This method did not require additional treatments such as the centrifugation, filtration and dialysis typical of the general hydrothermal method. These GQDs were observed to fluoresce, with their strongest emission in the near-UV region, at similar to 347 nm. Moreover, these GQDs, when in their pure state, formed a highly viscous liquid insoluble in water due to their lack of many oxygen-containing functional groups. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：181 / 188
页数：8
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