Green Synthesis of Fluorescent Carbon Quantum Dots for Detection of Hg2+
10.11895/j.issn.0253-3820.140133
- VernacularTitle:荧光碳量子点的绿色合成及高灵敏高选择性检测汞离子
- Author:
Yue XU
;
Chunjing TANG
;
Hong HUANG
;
Chaoqun SUN
;
Yakun ZHANG
;
Qunfeng YE
;
Aijun WANG
- Publication Type:Journal Article
- Keywords:
Carbon quantum dots;
Green synthesis;
Apple juice;
Mercury(Ⅱ) detection
- From:
Chinese Journal of Analytical Chemistry
2014;(9):1252-1258
- CountryChina
- Language:Chinese
-
Abstract:
Fluorescent carbon quantum dots ( CQDs) were synthesized by one-step hydrothermal treatment of apple juice. Experiments showed that Hg2+could quench the fluorescence of the CQDs with specificity. Based on this phenomenon, a selective and sensitive sensor was constructed for Hg2+ detection. In a NaH2 PO4-Na2HPO4 buffer solution (pH 7. 0), their fluorescence intensity showed good linear relationship with the concentrations of Hg2+ from 5 to 100 nmol/L and 1 to 50 μmol/L, respectively, with the detection limit of 2. 3 nmol/L (S/N=3). Its practical application was further demonstrated by the detection of Hg2+ in real water samples.
