Highly efficient and stable PANI/TRGO nanocomposites as active materials for electrochemical detection of dopamine

Thermally reduced graphene oxides (TRGOs), produced at 400 and 700 °C, polyaniline (PANI) were used for one-pot facile hydrothermal synthesis of binary nanocomposites (PANI/TRGO). The morphology chemical composition these materials thoroughly characterized by means scanning electron microscopy, nitrogen sorption 77 K, elemental analysis, X-ray photoelectron spectroscopy, diffraction, sheet resistance measurements. Cyclic voltammetry, differential pulse voltammetry electrochemical impedance spectroscopy characterization. microscopy (SEM) observation revealed that the TRGOs has a crucial impact on distribution PANI in composites. A more homogenous was achieved PANI/TRGO-700 due to higher degree exfoliation starting material TRGO-700. synthesized composites investigated as modifiers glassy carbon electrodes (GCEs) sensing dopamine. Both, an appropriate oxygen content are key DA sensing. Thus, better performance active revealed, achieving LOD 430 nM, excellent sensitivity (6.7 µA µM ?1 ) stability after 30 days.