Electrocatalytic Detection of Amitrole on the Multi-Walled Carbon Nanotube – Iron II tetra-aminophthalocyanine PlatformReportar como inadecuado




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1

Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa

2

Molecular and Nanomaterials Electrochemistry Laboratory, Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa





*

Author to whom correspondence should be addressed.



Abstract It is shown that ironII tetra-aminophthalocyanine complex electropolymerized onto a multi-walled carbon nanotube-modified basal plane pyrolytic graphite electrode greatly enhanced the electrocatalytic detetion of amitrole a toxic herbicide, resulting in a very low detection limit 0.5 nM and excellent sensitivity of 8.80±0.44 μA-nM, compared to any known work reported so far. The electrocatalytic detection of amitrole at this electrode occurred at less positive potential ~0.3 V vs Ag|ACl and also revealed a typical coupled chemical reaction. The mechanism for this response is proposed. The electrode gave satisfactory selectivity to amitrole in the presence of other potential interfering pesticides in aqueous solutions. View Full-Text

Keywords: Amitrole; tetra-aminophthalocyanine; electropolymerization; multi walled carbon nanotubes; basal plane pyrolytic graphite electrode Amitrole; tetra-aminophthalocyanine; electropolymerization; multi walled carbon nanotubes; basal plane pyrolytic graphite electrode





Autor: Msimelelo Siswana 1, Kenneth I. Ozoemena 2,* and Tebello Nyokong 1

Fuente: http://mdpi.com/



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