Highly sensitive fluorescent probe for Cr3+ detection using carbon quantum dots

DOI

10.2991/ifeesm-17.2018.164How to use a DOI?

Keywords

Carbon quantum dots, Hydrogen peroxide, Fluorescent probe, Cr3+

Abstract

Carbon quantum dots (CQDs) had been widely applied in the metal ions detection area due to their excellent optical properties and low toxicity. Herein, a series of CQDs with different sizes were prepared by a facile but effective hydrogen peroxide (H2O2) oxidative method using activated carbon as carbon source. Experimental results showed that the concentration of H2O2 aqueous solution had critical effect on the sizes and surface structure of CQDs. When H2O2 aqueous solution was 20 wt.%, the diameter of CQDs was 3.6 nm, and the fluorescent probe exhibited a good linear response to Cr3+ in the concentration range from 0.2 to 55 M with a detection limit of 0.2 M. Through systematically analyzing FTIR, XPS and the optical properties of CQDs, the high sensitivity of CQDs for detecting Cr3+ was attributed to the synergistic effect of the surface oxygen-containing functional groups and size of CQDs.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chengfeng Huangfu
AU  - Juanyuan Hao
AU  - Ce Hao
PY  - 2018/02
DA  - 2018/02
TI  - Highly sensitive fluorescent probe for Cr3+ detection using carbon quantum dots
BT  - Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)
PB  - Atlantis Press
SP  - 871
EP  - 877
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-17.2018.164
DO  - 10.2991/ifeesm-17.2018.164
ID  - Huangfu2018/02
ER  -