Amperometric sensing of catechol by using a nanocomposite prepared from Ag/Ag2O nanoparticles and N,S-doped carbon quant
- PDF / 1,100,085 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 3 Downloads / 156 Views
ORIGINAL PAPER
Amperometric sensing of catechol by using a nanocomposite prepared from Ag/Ag2O nanoparticles and N,S-doped carbon quantum dots Tianrong Zhan 1
&
Guiyan Ding 1 & Wei Cao 1 & Jiamin Li 1 & Xilin She 2 & Hongni Teng 3
Received: 17 April 2019 / Accepted: 17 September 2019 # Springer-Verlag GmbH Austria, part of Springer Nature 2019
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. Keywords N,S-doped carbon quantum dots . Ag and Ag2O nanoparticles . Modified electrode . Catechol . Electrochemical sensor
Introduction Catechol (1,2-dihydroxybenzene) is widely found in an aquatic environment because of extensive application in cosmetics, dyes, antioxidants, plastics, petrochemicals, photography, agricultural and pharmaceutical chemicals. Due to its high toxicity to environment and Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00604-019-3848-0) contains supplementary material, which is available to authorized users. * Tianrong Zhan [email protected] 1
Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science (Ministry of Education), Qingdao University of Science and Technology, Qingdao 266042, China
2
College of Environmental Science and Engineering, State Key Laboratory of Bio-fibers and Eco-textiles, Shandong Collaborative Innovation Center for Marine Biomass Fiber, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, People’s Republic of China
3
Department of Applied Chemistry, College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266510, China
worldwide life albeit at very low concentration [1, 2], catechol has been stated as environmental pollutants by the U.S. Environmental Protection Agency and the European Union [3–5]. To date, many methods have been utilized for detection of catechol, such as fluorescence, spectrophotometry, chromatography, capillary electrophoresis, chemiluminescence and electrochemical method [4–7]. Among them, electrochemical techniques are preferably used for detection of catechol owing to simplicity, low cost, portability and sensitivity. However, even for highly electroactive catechol, comme
Data Loading...
