Synthesis of Graphene- Poly Catechol Conductive Polymer Nanocomposite Production by Electropolymerization for use in electrochemical sensors

One of the materials used in the manufacture of sensors is nanocomposites. Nanocomposite components have better properties than other materials due to the surface interaction between the base material and the filler. The aim of this study was to synthesize nanocomposites including graphene and polytechnic as a conductive polymer for use in electrochemical sensors. Electropolymerization method was used to synthesize nanocomposite. Graphene was chosen as the phase and poly catechol phase as a reinforcing phase and this polymer material was distributed on a wide range of graphene. SEM images of synthesized nanocomposites showed that this composition has a very porous morphology consisting of a sheet-like structure. Sodium nitrite and barium sulfate were used for oxidation on the modified electrode surface. The results showed that the electrochemical sensor made in a wide range of concentrations of nitrite has a linear response and can be used for quantitative measurement of these two species. Using calibration curve slope for the two studied species, the detection limit of this electrochemical sensor for nitrite was calculated to be 0.741 μM for nitrite. The results showed that synthesized nano sensor could be used as an anesthetic due to high sensitivity, optimal linear response, acceptable stability and not interference with interference. The use of graphene nanoscopes, which has the most effective properties to reduce electron transfer resistance and increase conductivity at the electrode surface, has been able to provide a very suitable surface with a high surface area for use in nanosized composites.