Tổng hợp Mn2O3 kích thước nanomet bằng phương pháp đốt cháy gel ở nhiệt độ thấp

Abstract

Manganese oxide power has been synthesised at low temperature (600^oC) by the combustion of gel prepared from polyvinyl alcohol (PVA) and manganese nitrate. Mn₂O₃ characterization is examined by X-ray diffraction (XRD), thermogravimetric and differential thermal analysis (TG-DTA), scanning electron microscopy (SEM) and BET (Brunaure-Emmet-Teller) measurements. Further thermal treatment at 500 - 800^oC for 2h yields the single phase Mn₂O₃ with average primary size < 80 nm. It specific surface area is 47 m²/g for Mn₂O₃.