Chemical anchoring of aminobenzoate onto the surface of SnO2 nanoparticles for synthesis of polyaniline/SnO2 composite

In order to increase the conjunction between PANI and SnO2, an efficient method was proposed to synthesize polyaniline/aminobenzoate/tin dioxide composite (PANI–AB–SnO2) with tight junction structure via grafting PANI onto SnO2 nanoparticles modified with AB, in which AB was chemically anchored onto the surface of SnO2 nanoparticles. Characterization of structure and morphology of the composite indicated that COOH group of AB molecule could coordinate to Sn (IV) on the surface of SnO2 to form a bidentate bridging compound, and proved that the prepared composite existed stronger interaction force between PANI and SnO2 nanoparticles. Electrochemical property measurements showed that the composite had improved properties, and its specific capacitance was up to 259.5 F g−1 at a current density of 5 mA cm−2, ca. 47.8% higher than that of PANI–SnO2 (175.5 F g−1) synthesized in the similar condition. In addition, it also showed a good electrochemical stability.