One-Step Synthesis of MnO2 Particles Distributed Polyaniline–Poly(styrene-sulfonic acid)

In this paper, polyaniline–poly(styrene-sulfonic acid)–manganese dioxide (PANI–PSS–MnO2) composite was prepared by an interfacial reaction of potassium permanganate (KMnO4) in PSS/ANI in chloroform. This method synthesizes MnO2 particles incorporated in PANI–PSS by reduction of Mn7+ to Mn2+ and oxidation of Mn2+ to Mn4+ (MnO2) with the simultaneous chemical oxidation polymerization of ANI. The immiscible liquid interface offers a unique microenvironment for confining the growth of PANI to form PANI–MnO2 in the presence of PSS. The PANI–PSS–MnO2 composite was verified through characterization by scanning microelectronic microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and FTIR spectroscopy. Cyclic voltammetric (CV) results showed that PANI–PSS–MnO2 effectively catalyzed the oxidation of hydrogen peroxide (H2O2). The simple and inexpensive route for the preparation of PANI–PSS–MnO2 composites can be used in the production of sensor electrodes in H2O2 and glucose detection.