Abstract
ABSTRACTSubstituted polyanilines, including poly(o-methoxyaniline) (PoMOA), poly(o-methylaniline) (PoMA), and poly(m-methylaniline) (PmMA), hollow nanosphereswere preparedin an aqueous solution of poly(methyl vinyl ether-alt-maleic acid) through a self-assembly processusing ammonium persulfate as the oxidant. The average diameters of the PoMOA, PoMA, and PmMA hollow nanospheres were 210 ± 20 nm, 338 ± 25 nm, and 575 ± 59 nm, respectively, thus highly affected by the substituent type and position. The structural properties of the substituted PANIs hollow nanospheres were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and conductivity measurements. The electro-catalytic activities of the substituted PANIs hollow nanospheres towards the oxidation of ascorbic acid (AA) were investigated by cyclic voltammetry. Compared to PoMA and PmMA, the PoMOA hollow nanospheres displayed superior electro-catalytic activity towards AA oxidation.
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