Preparation of SnO₂ Powders by Modified Polyol Synthesis Using 1,2-Propanediol and Calcination

Abstract

SnO2 powders were prepared using a modified polyol synthesis method and subsequent calcinations. Well-dispersed spherical 2SnO∙(H2O) particles could be synthesized at room temperature through the modified polyol method using tin (II) 2-ethylhexanoate as the precusor, 1,2-propanediol as the solvent, PVP as the capping agent, and sodium borohydride as the reducing agent. The 2SnO∙(H2O) nanoparticles agglomerated to form larger particles during the drying step, and most of these larger nanoparticles coalesced with one another. Finally, these 2SnO∙(H2O) nanoparticles were successfully transformed into the SnO2 phase by calcination for 1 h at 500 °C.