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Sensors 2016, 16(6), 935; doi:10.3390/s16060935

Electrochemical Sensing toward Trace As(III) Based on Mesoporous MnFe2O4/Au Hybrid Nanospheres Modified Glass Carbon Electrode

1
Shanxi Province Key Laboratory of Functional Nanocomposites, North University of China, Taiyuan 030051, China
2
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Ki-Hyun Kim
Received: 14 April 2016 / Revised: 1 June 2016 / Accepted: 14 June 2016 / Published: 22 June 2016
(This article belongs to the Special Issue The Use of New and/or Improved Materials for Sensing Applications)
View Full-Text   |   Download PDF [2073 KB, uploaded 22 June 2016]   |  

Abstract

Au nanoparticles decorated mesoporous MnFe2O4 nanocrystal clusters (MnFe2O4/Au hybrid nanospheres) were used for the electrochemical sensing of As(III) by square wave anodic stripping voltammetry (SWASV). Modified on a cheap glass carbon electrode, these MnFe2O4/Au hybrid nanospheres show favorable sensitivity (0.315 μA/ppb) and limit of detection (LOD) (3.37 ppb) toward As(III) under the optimized conditions in 0.1 M NaAc-HAc (pH 5.0) by depositing for 150 s at the deposition potential of −0.9 V. No obvious interference from Cd(II) and Hg(II) was recognized during the detection of As(III). Additionally, the developed electrode displayed good reproducibility, stability, and repeatability, and offered potential practical applicability for electrochemical detection of As(III) in real water samples. The present work provides a potential method for the design of new and cheap sensors in the application of electrochemical determination toward trace As(III) and other toxic metal ions. View Full-Text
Keywords: arsenite; MnFe2O4/Au; electrochemical detection; SWASV arsenite; MnFe2O4/Au; electrochemical detection; SWASV
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Zhou, S.; Han, X.; Fan, H.; Liu, Y. Electrochemical Sensing toward Trace As(III) Based on Mesoporous MnFe2O4/Au Hybrid Nanospheres Modified Glass Carbon Electrode. Sensors 2016, 16, 935.

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