Preparation of Coal-based C-dots and Their Application in Trace CuⅡ Detection
10.11895/j.issn.0253-3820.170222
- VernacularTitle:煤基碳点的制备及其在检测痕量Cu2+中的应用
- Author:
Bo ZHANG
1
;
Maimaiti HALIDAN
;
Fei Yun ZHANG
;
Qiu Yan DAI
Author Information
1. 新疆大学化学化工学院
- Keywords:
Coal;
Carbon-dots;
Fluorescent probes;
CuⅡ
- From:
Chinese Journal of Analytical Chemistry
2017;45(10):1489-1496
- CountryChina
- Language:Chinese
-
Abstract:
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 ( H2 SO4+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 CuⅡ. The finding was exploited to design a fluorometric assay for CuⅡ with a detection limit of 9. 6 nmol/L.
