Preparation of Coal-based C-dots and Their Application in Trace CuⅡ Detection / 分析化学
Chinese Journal of Analytical Chemistry
; (12): 1489-1496, 2017.
Article
em Zh
| WPRIM
| ID: wpr-659711
Biblioteca responsável:
WPRO
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.
Texto completo:
1
Base de dados:
WPRIM
Tipo de estudo:
Diagnostic_studies
Idioma:
Zh
Revista:
Chinese Journal of Analytical Chemistry
Ano de publicação:
2017
Tipo de documento:
Article