Citation: ZHANG Bo, HALIDAN Maimaiti, ZHANG Yun-Fei, DAI Yan-Qiu. Preparation of Coal-based C-dots and Their Application in Trace Cu Detection[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(10): 1489-1496. doi: 10.11895/j.issn.0253-3820.170222 shu

Preparation of Coal-based C-dots and Their Application in Trace Cu Detection

1.
Institute of Chemistry and Chemical Industry, Xinjiang University, Urumqi 830046, China;2 State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China

Received Date: 12 April 2017
Revised Date: 5 July 2017

Fund Project: This work was supported by the National Science Foundation of China (No. 21663028) and the State Key Laboratory of Fine Chemicals of Dalian University of Technology (No.KF1414).

One of the hot spots of nanomaterials research is the preparation of carbon-dots (C-dots) by simple steps with cheap raw materials and looking for its potential application. In this study, coal-based C-dots was prepared from coal mined of Wucaiwan in Xinjiang by mixed acids (H₂SO₄+HNO₃)/ultrasound treatment, and at the same time of structural characterization, the coal-based C-dots were used as fluorescent probe to detect metal ions in water. It was found that the coal-based C-dots were polycyclic aromatic hydrocarbons with particle size of (8±4) nm linked with oxygen-containing groups such as nitro group, possessing the annulus wall of multilayer graphene fragment structures built up by sp2 carbons. This endowed the coal-based C-dots with good dispersity in water, high absorbance and strong fluorescence. The coal-based C-dots were used as viable probes in that their fluorescence was selectively quenching by Cu. The finding was exploited to design a fluorometric assay for Cu with a detection limit of 9.6 nmol/L.
- Coal,
- Carbon-dots,
- Fluorescent probes,
- Cu
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沈阳化工大学材料科学与工程学院沈阳 110142