Preparation of Ag nanoparticle-decorated poly(m-phenylenediamine) microparticles and their application for hydrogen peroxide detection

摘要

The chemical oxidation polymerization of m-phenylenediaminen(MPD) by ammonium persulfate (APS) at room temperature resultsnin the formation of poly(m-phenylenediamine) (PMPD) microparticles.nThe subsequent treatment of such microparticles with annaqueous AgNO3 solution produces Ag nanoparticle (AgNP)-decoratednPMPD microparticles. It was found that as-formed AgNPsnexhibited remarkable catalytic performance toward the reduction ofnhydrogen peroxide (H2O2). The enzymeless H2O2 sensor constructednwith such composites showed a fast amperometric responsentime of less than 5 s, and the corresponding linear range andndetection limit were estimated to be from 0.1 to 30mMand 4.7 mM,nrespectively, at a signal-to-noise ratio of 3.