Issue 128, 2015
From the journal:

RSC Advances

The carbonization of polyethyleneimine: facile fabrication of N-doped graphene oxide and graphene quantum dots†

Xi Zhou,a   Yumei Pan,a   Jian Xu,a   Anqi Wang,a   Shishan Wu*a  and  Jian Shen*a  

* Corresponding authors

a School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
E-mail: shishanwu@nju.edu.cn, shenj57@nju.edu.cn

Abstract

In this study, N-doped graphene oxide (N-GO) and graphene quantum dots (N-GQDs) were synthesized by the carbonization of branched polyethyleneimine (PEI) in the presence of H2O2. The prepared N-GO has plenty of small sp2 clusters, which are non-uniform in size and poorly passivated, leading to a weak and an excitation-dependent photoluminescent (PL) performance. Whereas N-GQDs exhibit a strong and excitation-independent PL property because of the sp2 clusters uniform in size and well passivated by the partially carbonized PEI. Furthermore, the obtained N-GQDs show little cytotoxicity and promise in Pb2+ recognition as well as cell imaging.

Graphical abstract: The carbonization of polyethyleneimine: facile fabrication of N-doped graphene oxide and graphene quantum dots

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Article information

DOI
https://doi.org/10.1039/C5RA25173G
Article type
Paper
Submitted
26 Nov 2015
Accepted
01 Dec 2015
First published
03 Dec 2015

RSC Adv., 2015,5, 105855-105861

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The carbonization of polyethyleneimine: facile fabrication of N-doped graphene oxide and graphene quantum dots

X. Zhou, Y. Pan, J. Xu, A. Wang, S. Wu and J. Shen, RSC Adv., 2015, 5, 105855 DOI: 10.1039/C5RA25173G

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