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- Title
Amperometric sensing of catechol by using a nanocomposite prepared from Ag/Ag2O nanoparticles and N,S-doped carbon quantum dots.
- Authors
Zhan, Tianrong; Ding, Guiyan; Cao, Wei; Li, Jiamin; She, Xilin; Teng, Hongni
- Abstract
This work describes the synthesis of a nanocomposite consisting of Ag2O, silver nanoparticles and N,S-doped carbon quantum dots (Ag2O/Ag@NS-CQD). The NS-CQD were prepared by hydrothermal treatment of p-aminobenzenesulfonic acid. They act as both the reducing and stabilizing agent for synthesis of Ag2O/Ag@NS-CQD. The composite was characterized by UV-vis spectroscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The glassy carbon electrode (GCE) was modified by coating it with Ag2O/Ag@NS-CQD. It exhibits excellent amperometric response to catechol, typically at a low working potential of around 0.25 V. Under the best experimental conditions, the sensor has a wide linear response (0.2 to 180 μM) and a low detection limit (13 nM; at S/N = 3). The method was applied to analysis of spiked water samples and gave satisfactory results.
- Subjects
SILVER sulfide; QUANTUM dots; CARBON electrodes; X-ray photoelectron spectroscopy; STABILIZING agents; TRANSMISSION electron microscopy; SILVER nanoparticles
- Publication
Microchimica Acta, 2019, Vol 186, Issue 11, pN.PAG
- ISSN
0026-3672
- Publication type
Article
- DOI
10.1007/s00604-019-3848-0