Electrochemical oxidation of p-nitrophenol using graphene-modified electrodes, and a comparison to the performance of MWNT-based electrodes
作者： Adina Arvinte , Mika Mahosenaho , Mariana Pinteala , Adama-Marie Sesay , Vesa Virtanen
DOI: 10.1007/S00604-011-0628-X
关键词: Chemically modified electrode 、 Graphene 、 Working electrode 、 Analytical chemistry 、 Electrode 、 Nafion 、 Differential pulse voltammetry 、 Chemical engineering 、 Materials science 、 Carbon nanotube 、 Electrochemistry
摘要: The electrochemical oxidation of p-nitrophenol (p-NP) has been studied comparatively on a graphene modified electrode and multiwall carbon nanotube (MWNT) by using cyclic differential pulse voltammetry. sensors were fabricated modifying screen-printed electrodes with MWNT nanomaterials, respectively, both dispersed in Nafion polymer. p-NP is irreversibly oxidized at +0.9 V (vs. the Ag/AgCl) solutions pH 7. height potential peaks depend range from 5 to 11. In acidic media, yields well-defined peak +0.96 which gradually increases concentration analyte. case voltammetry sulfuric acid solution, sensitivity practically same for electrodes. display an unusually wide linear response (from 10 μM 0.62 mM p-NP), detection limit 0.6 electrode, 1.3 electrode.
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