Tổng hợp Co3O4 kích thước nanomet bằng phương pháp đốt cháy gel.

Abstract

Co₃O₄ powder has been  synthesised at low temperature (600^oC) by the combustion of gel prepared from  polyvinyl alcohol (PVA) and cobalt nitrates. Factors affecting on synthesis process of nanometer oxides Co₃O₄ including temperature and pH of gel formation, molar ratio of cobalt concentration and polyvinyl alcohol concentration, temperature of calcining on structure and parcticles sizes were investigated. The crystalline process and the morphology of  oxides particles were considered by X-Ray diffraction (XRD), Scanning Electron Microscopy (SEM). Surface  areas of oxides were determined by the BET (Brunaure-Emmet-Teller) method. Further thermal treatment at 400 – 700^oC for 2 hours yields the single phase Co₃O₄ with a specific surface area  39.68  m²/g.