Characterization of surfactant/hydrotalcite-like clay/glassy carbon modified electrodes: oxidation of phenol.
作者： María Hernández , Lenys Fernández , Carlos Borrás , Jorge Mostany , Hermes Carrero
DOI: 10.1016/J.ACA.2007.06.010
关键词:
摘要: The characteristics of hydrotalcite (HT)-like clay films containing ionic and nonionic surfactants their ability to oxidize phenol have been examined. HT (Co/Al-NO3) was synthesized by coprecipitation techniques then modified with such as sodium dodecylbenzenesulfonate (SDBS), octylphenoxypolyethoxyethanol (TX100) or cetylpyridinium bromide (CPB). X-ray diffraction analysis revealed that the interlayer basal spacing varied depending on type surfactant retained HT. presence SDBS CPB expanded interlayer, which in TX100 did not show an appreciable change. Phenol oxidation is favored at surfactant-HT-GC electrodes, after a preconcentration time, compared HT-GC GC electrodes. Surfactant-HT-GC electrodes display good stability continuous electrochemical oxidation. At pH values between 6 10.8, both SDBS-HT-GC TX100-HT-GC seem be promising for detection water; while CPB-HT-GC electrode should affected inorganic anions.
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