Sensitive Simultaneously Determination of Cd2+ and Pb2+ by Polypyrrole/Multi-Walled Carbon Nanotube Modified Electrode

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A new functionalized composites (PPy/c-MWNT) by carboxylic multiwalled carbon nanotube (c-MWNT) with polypyrrole (PPy) was studied. PPy/c-MWNT modified glassy carbon electrode (PPy/c-MWNT/GCE) for determination of Cd2+ and Pb2+ was described by cyclic voltammetry, electrochemical impedance spectroscopy, and anodic stripping voltammetry (ASV). PPy/c-MWNT/GCE greatly improved the sensitivity of determining Cd2+ and Pb2+. The striping peak currents changed linearly with the concentration of Cd2+ from 1.0×10-4 to 2.0×10-7 mol/L for an accumulation time of 400 s, and Pb2+ from 1.0×10-4 to 1.0×10-7 mol/L. The high sensitivity, selectivity, and stability of the PPy/c-MWNT/GCE demonstrated its practical application for a simple, rapid and economical determination of trace level of Cd2+ and Pb2+ in water samples

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Periodical:

Edited by:

Helen Zhang, David Jin and X.J. Zhao

Pages:

109-112

Citation:

Z. H. Wang et al., "Sensitive Simultaneously Determination of Cd2+ and Pb2+ by Polypyrrole/Multi-Walled Carbon Nanotube Modified Electrode", Advanced Materials Research, Vol. 578, pp. 109-112, 2012

Online since:

October 2012

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$38.00

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