caa a22 4500 445881127 CHVBK 20180317145543.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00604-011-0628-x doi (NATIONALLICENCE)springer-10.1007/s00604-011-0628-x Electrochemical oxidation of p-nitrophenol using graphene-modified electrodes, and a comparison to the performance of MWNT-based electrodes [Elektronische Daten] [Adina Arvinte, Mika Mahosenaho, Mariana Pinteala, Adama-Marie Sesay, Vesa Virtanen] The electrochemical oxidation of p-nitrophenol (p-NP) has been studied comparatively on a graphene modified electrode and a multiwall carbon nanotube (MWNT) electrode by using cyclic and differential pulse voltammetry. The sensors were fabricated by modifying screen-printed electrodes with graphene and MWNT nanomaterials, respectively, both dispersed in Nafion polymer. p-NP is irreversibly oxidized at +0.9V (vs. the Ag/AgCl) in solutions of pH 7. The height and potential of the peaks depend on pH in the range from 5 to 11. In acidic media, p-NP yields a well-defined oxidation peak at +0.96V which gradually increases in height with the concentration of the analyte. In case of differential pulse voltammetry in sulfuric acid solution, the sensitivity is practically the same for both electrodes. The modified electrodes display an unusually wide linear response (from 10μM to 0.62mM of p-NP), with a detection limit of 0.6μM in case of the graphene electrode, and of 1.3μM in case of the MWNT electrode. Figure DPV responses of graphene and MWNT electrodes to increasing concentrations of p-NP in H2SO4 20mM solution. Inset: liniar plot of oxidation peak currents with the concentration of p-NP. Springer-Verlag, 2011 Graphene nationallicence p-nitrophenol nationallicence electrochemical oxidation nationallicence carbon nanotubes nationallicence Arvinte Adina Institute of Macromolecular Chemistry "Petru Poni”, Centre of Advanced Research in Nanobioconjugates and Biopolymers, Grigore Ghica Voda Alley 41A, 700487, Iasi, Romania aut Mahosenaho Mika CEMIS-OULU, Kajaani University Consortium, University of Oulu, Salmelantie 43, 88600, Sotkamo, Finland aut Pinteala Mariana Institute of Macromolecular Chemistry "Petru Poni”, Centre of Advanced Research in Nanobioconjugates and Biopolymers, Grigore Ghica Voda Alley 41A, 700487, Iasi, Romania aut Sesay Adama-Marie CEMIS-OULU, Kajaani University Consortium, University of Oulu, Salmelantie 43, 88600, Sotkamo, Finland aut Virtanen Vesa CEMIS-OULU, Kajaani University Consortium, University of Oulu, Salmelantie 43, 88600, Sotkamo, Finland aut Microchimica Acta Springer Vienna 174/3-4(2011-09-01), 337-343 0026-3672 174:3-4<337 2011 174 604 https://doi.org/10.1007/s00604-011-0628-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0628-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Arvinte Adina Institute of Macromolecular Chemistry "Petru Poni”, Centre of Advanced Research in Nanobioconjugates and Biopolymers, Grigore Ghica Voda Alley 41A, 700487, Iasi, Romania aut NATIONALLICENCE 700 1- Mahosenaho Mika CEMIS-OULU, Kajaani University Consortium, University of Oulu, Salmelantie 43, 88600, Sotkamo, Finland aut NATIONALLICENCE 700 1- Pinteala Mariana Institute of Macromolecular Chemistry "Petru Poni”, Centre of Advanced Research in Nanobioconjugates and Biopolymers, Grigore Ghica Voda Alley 41A, 700487, Iasi, Romania aut NATIONALLICENCE 700 1- Sesay Adama-Marie CEMIS-OULU, Kajaani University Consortium, University of Oulu, Salmelantie 43, 88600, Sotkamo, Finland aut NATIONALLICENCE 700 1- Virtanen Vesa CEMIS-OULU, Kajaani University Consortium, University of Oulu, Salmelantie 43, 88600, Sotkamo, Finland aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 174/3-4(2011-09-01), 337-343 0026-3672 174:3-4<337 2011 174 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer