Département de chimie moléculaire

Nanocomposite materials synthesized by incorporation of Ru oxide nanoparticles into a poly(pyrrole-alkylammonium) matrix were characterized by TEM and by electrochem. Ru oxide-based nanocomposites films coated onto C appeared efficient electrocatalysts for the oxidn. of As(III) into As(V) species at a remarkable low potential, i.e. in the 0.3-0.5 V vs. Ag/AgCl range. Bulk electrocatalytic oxidn. of arsenite solns. could be performed in the presence of a water-sol. poly(quaternary ammonium) salts acting as the supporting electrolyte and also as an As(V) complexing agent, which allowed to combine electrocatalytic oxidn. of As(III) with the liq. phase polymer-assisted retention (LPR) technique to efficiently remove As from polluted solns. [on SciFinder(R)]