Graphenated polyaniline-doped tungsten oxide nanocomposite sensor for real time determination of phenanthrene

SOURCE: Electrochimica Acta
OUTPUT TYPE: Journal Article
PUBLICATION YEAR: 2014
TITLE AUTHOR(S): O.Tovide, N.Jaheed, N.Mohamed, E.Nxusani, C.E.Sunday, A.Tsegaye, R.F.Ajayi, N.Njomo, H.Makelane, M.Bilibana, P.G.Baker, A.Williams, S.Vilakazi, R.Tshikhudo, E.I.Iwuoha
KEYWORDS: ENVIRONMENT, GRAPHENATED-POLYANILINE, NANCOMPOSITE, POLLUTION, POLYAROMATIC HYDROCARBON
DEPARTMENT: Center for Science, Technology and Innovation Indicators (CeSTii)
Print: HSRC Library: shelf number 8419

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Abstract

A graphenated polyaniline/tungsten oxide (PANI/WO3/GR) nanocomposite sensor was prepared by elec-tropolymerisation of a mixture of aniline monomer and tungsten oxide on a graphene-modified glassycarbon electrode (GCE). The PANI/WO3/GR/GCE nanocomposite electrode was tested as a sensor for the determination of phenanthrene. The direct electro-oxidation behaviour of phenanthrene on thePANI/WO3/GR modified GCE was carefully investigated by cyclic voltammetry. The results indicated that the PANI/WO3/GR/GCE sensor was more sensitive to phenanthrene (with a dynamic linear range of 1.0 -6.0 pM and a detection limit of 0.123 pM.) than GCE, PANI/GCE or PANI/WO3/GCE. The sensor exhibited excellent reproducibility and long-term stability. The sensor exhibits lower detection sensitivity than the WHO permissible level of 1.12 nM phenanthrene in waste water.