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

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Tovide, O., Jaheed, N., Mohamed, N., Nxusani, E., Sunday, C.E., Tsegaye, A., Ajayi, R.F., Njomo, N., Makelane, H., Bilibana, M., Baker, P.G., Williams, A., Vilakazi, S., Tshikhudo, R. & Iwuoha, E.I. (2014) Graphenated polyaniline-doped tungsten oxide nanocomposite sensor for real time determination of phenanthrene. Electrochimica Acta. 128:138-148. http://hdl.handle.net/20.500.11910/2194

http://hdl.handle.net/20.500.11910/2194
 
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.
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25 Aug 2015
 
ENVIRONMENT
POLLUTION
NANCOMPOSITE
GRAPHENATED-POLYANILINE
POLYAROMATIC HYDROCARBON
 
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