Ratiometric fluorescent detection of chromium(VI) in real samples based on dual emissive carbon dots

Talanta
Yunxia MaXingguo Chen

Abstract

As we know, hexavalent chromium (Cr(VI)) was usually used as an additive to improve the color fastness during the printing and dyeing process, and thus posing tremendous threat to our health and living quality. In this work, the dual emissive carbon dots (DECDs) were synthesized through hydrothermal treatment of m-aminophenol and oxalic acid. The obtained DECDs not only exhibited dual emission fluorescence peaks (430 nm, 510 nm) under the single excitation wavelength of 380 nm, but also possessed good water solubility and excellent fluorescence stability. A ratiometric fluorescent method for the determination of Cr(VI) was developed using the DECDs as a probe. Under the optimal conditions, a linear range was obtained from 2 to 300 μM with a limit of detection of 0.4 μM. Furthermore, the proposed ratiometric fluorescent method was applied to the analysis of Cr(VI) in textile, steel, industrial wastewater and chromium residue samples with satisfactory recoveries (88.4-106.8%).

Citations

Sep 3, 2020·Critical Reviews in Food Science and Nutrition·Yong HanZhonghong Li
Feb 7, 2019·Mikrochimica Acta·Félicité Pacifique MutuyimanaXingguo Chen
Aug 20, 2019·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Yifang GaoChuan Dong
Jun 13, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Liman SaiJianwen Yang
Jan 7, 2021·Analytical Methods : Advancing Methods and Applications·Qiaoqiao WenSuxiang Feng
Aug 8, 2020·The Science of the Total Environment·Lijun MengXubiao Luo
Dec 9, 2020·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Ziting Zhang, Zhefeng Fan

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