期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 243, 期 -, 页码 1-7出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.11.108
关键词
Reduced graphene oxide; Gold nanoparticles; Iron; Electrochemical reduction; Coastal waters
资金
- National Natural Science Foundation of China [41276093]
- Youth Innovation Promotion Association [2011170]
- Outstanding Young Scientists Program
- Equipment Development Project of Chinese Academy of Sciences [YZ201558]
An electrochemical sensor based on reduced graphene oxide (rGO) and gold nanoparticles (AuNPs) modified electrode was utilized for determination of trace iron in coastal waters with the aid of the iron complexing ligand 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP). 5-Br-PADAP reacted with iron in short chelating reaction time (<3 min). rGO as a support provided large specific surface area for AuNPs, which would facilitate the electrochemical reduction of Fe(III)-5-Br-PADAP. Under the optimized conditions, the response of Fe(III) at this resulting sensor was linear in the range of 30 nM to 3 pNI with a detection limit of 3.5 nM. This sensor also had excellent reproducibility and repeatability. Additionally, the modified electrode had been successfully applied to the determination of Fe(III) in real coastal waters. (C) 2016 Elsevier B.V. All rights reserved.
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