Adsorptive stripping voltammetry determination of hexavalent chromium by a pyridine functionalized gold nanoparticles/three-dimensional graphene electrode

An electrode modified with pyridine functionalized gold nanoparticles and three-dimensional graphene was prepared and employed for the voltammetry determination of hexavalent chromium. Graphene oxide was electrochemically reduced on glassy carbon electrode. Gold nanoparticles were electrodeposited on the surface of graphene under constant potential. Pyridine group anchored on gold nanoparticles by self-assembly. The modified materials were...