Structural and textural properties of zinc (II)-chromium (III) spinel oxides prepared using a hydrotalcite-like compound

摘要

Spinel oxides are important industrial catalysts, possessing good thermal and chemical stability and an ability to maintain catalytic activity at high temperatures. The study reported here is concerned with the properties of Zn(II)-Cr(III) spinel oxides prepared from a carbonate containing LDH precursor. For this study the spinel oxide was separated, by treatment with dilute mineral acid, from the oxide mixture (ZnO and ZnCr{sub}2O{sub}4) obtained by the thermal decomposition of LDH. For comparison, Zn(II)-Cr(III) spinel oxides were also prepared by more standard synthesis methods. Structural and textural properties were evaluated, using PXRD, TG/MS, FT-IR and N{sub}2 adsorption.