Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7676595 | Talanta | 2018 | 21 Pages |
Abstract
In this work, Lycii Fructus as raw materials for green synthesis of fluorescent carbon dots (CDs) reduce AgNO3. The CDs-AgNPs were synthesized by one-step method. CDs were applied to stabilize AgNPs due to abundant functional groups on the surface of CDs. In presence of phoxim, the dispersed CDs-AgNPs get aggregated and the absorption peak with red shift from 400â¯nm to 525â¯nm, resulting in the color changed from yellow to red. Under optimized conditions, the absorbance ratio at A525â¯nm/A400â¯nm was related linearly to the concentrations of phoxim in the range of 0.1-100â¯Î¼M. The detection limit was calculated to 0.04â¯Î¼M, which is lower than maximum residue limits of phoxim in samples in China. The colorimetric sensor was successfully utilized to monitoring phoxim in environmental and fruit samples with good recoveries ranges from 87% to 110.0%. These results showed the sensor had a promising application prospect in real samples.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Mingda Zheng, Chenge Wang, Yingying Wang, Wei Wei, Shuang Ma, Xiaohan Sun, Jiang He,