An electrochemical sensor based on reduced graphene oxide/gold nanoparticles modified electrode for determination of iron in coastal waters

SENSORS AND ACTUATORS B-CHEMICAL

卷:243

Article

Zhu, Yun^1,2  Pan, Dawei^1,2,3  Hu, Xueping^1,2  Han, Haitao¹  Lin, Mingyue^1,2  Wang, Chenchen¹ 

[1] Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res YIC, Shandong Prov Key Lab Coastal Environm Proc,YICCA, Yantai 264003, Shandong, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Univ Liverpool, Sch Environm Sci, Dept Earth Ocean & Ecol Sci, Liverpool L69 3GP, Merseyside, England

关键词: Reduced graphene oxide;    Gold nanoparticles;    Iron;    Electrochemical reduction;    Coastal waters;   

DOI  :  10.1016/j.snb.2016.11.108

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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