NDLI: Anodic stripping voltammetric determination of Cd$^{2+}$ and Pb$^{2+}$ using interpenetrated MWCNT/P1,5-DAN as an enhanced sensing interface

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Ionics : Volume 21, Issue 1, January 2015

Anodic stripping voltammetric determination of Cd$^{2+}$ and Pb$^{2+}$ using interpenetrated MWCNT/P1,5-DAN as an enhanced sensing interface

Content Provider	Springer Nature Link
Author	Vu, Hoang Duy Nguyen, Lê Huy Nguyen, Tuan Dzung Nguyen, Hai Binh Nguyen, Thai Loc Tran, Dai Lam
Copyright Year	2014
Abstract	Square wave anodic stripping voltammetric detection of Cd$^{2+}$ and Pb$^{2+}$ was carried out on sputtered planar platinum electrodes, modified with interpenetrated multiwalled carbon nanotubes/poly(1,5-diaminonaphthalene) (MWCNT/P1,5-DAN) as a sensing interface. Electrochemical behavior of the sensor was investigated by cyclic and square wave voltammetry. Key parameters affecting sensor performance such as P1,5-DAN film thickness, deposition potential, and time were optimized. The sensor exhibited linear responses to Cd$^{2+}$ and Pb$^{2+}$ concentrations ranging from 4 to 150 μg L$^{−1}$. Under optimized conditions (five scan cycles, −1.2-V deposition potential, 420-s deposition time), the limits of detection were estimated to be around 3.2 and 2.1 μg L$^{−1}$ for Cd$^{2+}$ and Pb$^{2+}$, respectively. The successive addition of Na$^{+}$, Ca$^{2+}$, Zn$^{2+}$, Fe$^{2+}$, Al$^{3+}$, Cu$^{2+}$ (each 1.0 mg L$^{−1}$) and Cl$^{−}$, Br$^{−}$, SO$_{4}$ $^{2−}$ (each 10.0 mg L$^{−1}$) to 100-μg L$^{−1}$ Pb$^{2+}$ acetate buffer solution did not interfere with stripping peak current. Thus, modified MWCNT/P1,5-DAN electrode could be used as a good alternative to conventional mercury electrode for anodic stripping voltammetric determination of Cd$^{2+}$ and Pb$^{2+}$. The sensitivity, simplicity, ecosafety, and convenience of the suggested MWCNT/P1,5-DAN electrode were very competitive with respect to other methods such as atomic absorption spectrometry and anodic stripping voltammetry with hanging drop mercury electrodes. This sensing interface was applied to the determination of Pb$^{2+}$ and Cd$^{2+}$ contents in river water samples, and the results were quite corresponding to the value obtained by atomic absorption spectrometry. Therefore, a new type of “green electrode material,” MWCNT/P1,5-DAN, can potentially be extended to other electroanalytical applications.
Starting Page	571
Ending Page	578
Page Count	8
File Format	PDF
ISSN	09477047
Journal	Ionics
Volume Number	21
Issue Number	2
e-ISSN	18620760
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-07-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	1,5-Diaminonaphthalene Carbon nanotubes Cadmium Lead Anodic stripping voltammetry Electrochemistry Renewable and Green Energy Optical and Electronic Materials Condensed Matter Physics Energy Storage
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering Materials Science Chemical Engineering

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