title: Electrochemical Sensing toward Trace As(III) Based on Mesoporous MnFe₂O₄/Au Hybrid Nanospheres Modified Glass Carbon Electrode.
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.
authors.affiliation: Shanxi Province Key Laboratory of Functional Nanocomposites, North University of China, Taiyuan 030051, China. zhoushaofeng@nuc.edu.cn.
authors.forename: Shaofeng
authors.initials: S
authors.lastname: Zhou
authors.affiliation: Shanxi Province Key Laboratory of Functional Nanocomposites, North University of China, Taiyuan 030051, China. hanxj2015nn@163.com.
authors.forename: Xiaojuan
authors.initials: X
authors.lastname: Han
authors.affiliation: Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, China. whutfanfan@163.com.
authors.forename: Honglei
authors.initials: H
authors.lastname: Fan
authors.affiliation: Shanxi Province Key Laboratory of Functional Nanocomposites, North University of China, Taiyuan 030051, China. lyq@nuc.edu.cn.
authors.forename: Yaqing
authors.initials: Y
authors.lastname: Liu
keywords: MnFe2O4/Au; SWASV; arsenite; electrochemical detection