Issue 32, 2013
From the journal:

Journal of Materials Chemistry C

Graphitized carbon dots emitting strong green photoluminescence†

Yun Liu,a   Chun-yan Liu*a  and  Zhi-ying Zhanga  

* Corresponding authors

a Key Laboratory of Photochemical Conversion and Optoelectronic Materials of Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, PR China
E-mail: cyliu@mail.ipc.ac.cn
Tel: +86-010-82543573

Abstract

Water-soluble graphitized carbon dots (GCDs) with strong green photoluminescence (PL) and distinct visible-absorption have been prepared by one-step carbonization of ethylene glycol in the presence of concentrated sulfuric acid at 80 °C. The PL of GCDs is centered at about 519 nm with the full width at half maximum (FWHM) as small as 38 nm. The fluorescent quantum yield of the prepared GCDs was as high as 62.9%, without any pre- or post-treatment or any passivation agent. IR and XPS results demonstrated that GCDs were functionalized with carboxylic and hydroxyl groups, maintaining their remarkable PL even in strong acidic or high salt media. Due to the broad and strong absorption in the visible region, GCDs combined with titania achieved a better visible-activity in the photocatalytic degradation of dyes.

Graphical abstract: Graphitized carbon dots emitting strong green photoluminescence

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Article information

DOI
https://doi.org/10.1039/C3TC30670D
Article type
Paper
Submitted
11 Apr 2013
Accepted
12 Jun 2013
First published
13 Jun 2013

J. Mater. Chem. C, 2013,1, 4902-4907

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Graphitized carbon dots emitting strong green photoluminescence

Y. Liu, C. Liu and Z. Zhang, J. Mater. Chem. C, 2013, 1, 4902 DOI: 10.1039/C3TC30670D

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