Preparation and properties of Sb-doped SnO2/metal substrates by sol–gel and dip coating

Abstract Antimony-doped SnO 2 on metallic substrate is a useful electrode for electrochemical water treatment system. The Sb-doped SnO 2 films on aluminum and stainless steels, which are relatively workable or available metals, were prepared by the sol–gel technique and dip coating method. The precursor metal alkoxide/alcohol solutions were derived from SnCl 4 and SbCl 3 . Ammonia/alcohol solution was used for the synthesis and Cl − was eliminated by the precipitation of NH 4 Cl. The X-ray diffraction pattern of the SnO 2 film annealed at 400 °C could be assigned to SnO 2 . The Sb-SnO 2 film consisted of fine particles from 10 to 20 nm. In the electrolysis, Sb-SnO 2 /stainless steel electrodes showed an exfoliation but Sb-SnO 2 /aluminium did not. Our results indicate that SnO 2 /Al can be promising as a SnO 2 electrode for electrochemical water treatment.