4.7 Article

Electrodeposition of electroreduced graphene oxide-Au nanoparticles composite film at glassy carbon electrode for anodic stripping voltammetric analysis of trace arsenic(III)

Journal

SENSORS AND ACTUATORS B-CHEMICAL
Volume 188, Issue -, Pages 894-901

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.07.113

Keywords

Electroreduced graphene oxides (ERGO)-Au; nanoparticles (AuNPs) composite film; Anodic stripping voltammetry; Determination of trace arsenic(III); Electrochemical quartz crystal; microbalance

Funding

  1. National Natural Science Foundation of China [21075036, 21175042]
  2. Hunan Lotus Scholars Program
  3. Foundations of Hunan Provincial Education Department
  4. Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province and Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycling

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An electroreduced graphene oxide (ERGO)-Au nanoparticles (AuNPs) composite film was electrodeposited on a glassy carbon electrode (GCE) by cyclic voltammetry. The fabricated ERGO-AuNPs/GCE was used to determine trace As(III) in 0.20M aqueous HC1by anodic stripping voltammetry (ASV). An electrochemical quartz crystal microbalance (EQCM) was used to trace the film-formation processes and detect the interactions of arsenic species with the ERGO-AuNPs film. Under optimum conditions (preconcentration at 0.35 V for 400 s in 0.20M aqueous HCl), the ASV current peak by linear sweep voltammetry was linear with As(III) from 0.01 to 5 mu M, with a sensitivity of 12.2 mu A/mu M and a limit of detection (LOD) of 2.7 nM (0.20 ppb, S/N = 3). This method was successfully applied for analyses of As(III) in real water samples. (C) 2013 Elsevier B.V. All rights reserved.

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