Issue 9, 2012
From the journal:

Analyst

Stripping voltammetry study of ultra-trace toxic metal ions on highly selectively adsorptive porous magnesium oxide nanoflowers

Yan Wei,abc   Ran Yang,b   Xin-Yao Yu,b   Lun Wang,c   Jin-Huai Liub  and  Xing-Jiu Huang*b  

* Corresponding authors

a Department of Chemistry, Wannan Medical College, Wuhu 241002, PR China

b Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China
E-mail: xingjiuhuang@iim.ac.cn
Fax: +86-551-5592420
Tel: +86-551-5591142

c College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China

Abstract

We have demonstrated highly selective and sensitive detection of Pb(II) and Cd(II) using a highly selective adsorptive porous magnesium oxide (MgO) nanoflowers. The MgO nanoflower-modified glassy carbon electrode was electrochemically characterized using cyclic voltammetry; and the anodic stripping voltammetric performance of bound Pb(II) and Cd(II) was evaluated using square wave anodic stripping voltammetry (SWASV) analysis. The MgO nanoflower-modified electrode exhibited excellent sensing performance toward Pb(II) and Cd(II) that was never observed previously at bismuth (Bi)-based electrodes. Simultaneous additions of Pb(II) and Cd(II) were investigated in the linear range from 3.3 to 22 nM for Pb(II) and 40 to 140 nM for Cd(II), and detection limits of 2.1 pM and 81 pM were obtained, respectively. Some foreign ions, such as Cu(II), Zn(II) and Cr(III) do not interfere with the detection of Pb(II) and Cd(II). To the best of our knowledge, this is the first example of a highly adsorptive metal oxide with hierarchical micro/nanostructure that allows the detection of both Pb(II) and Cd(II) ions.

Graphical abstract: Stripping voltammetry study of ultra-trace toxic metal ions on highly selectively adsorptive porous magnesium oxide nanoflowers

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Article information

DOI
https://doi.org/10.1039/C2AN15939B
Article type
Paper
Submitted
08 Oct 2011
Accepted
14 Feb 2012
First published
16 Mar 2012

Analyst, 2012,137, 2183-2191

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Stripping voltammetry study of ultra-trace toxic metal ions on highly selectively adsorptive porous magnesium oxide nanoflowers

Y. Wei, R. Yang, X. Yu, L. Wang, J. Liu and X. Huang, Analyst, 2012, 137, 2183 DOI: 10.1039/C2AN15939B

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