Synthesis of Double Oxides Having Spinel Structure (ZnAl₂O₄, ZnGa₂O₄) by the Glycothermal Method

Abstract

Reaction of zinc acetate with aluminum isopropoxide (or galli u m acetylacetonate) in 1, 4-butanediol at 300°C under the spontaneous vapor pressure of the glycol (glycothermal reaction )yielded single-phase zinc aluminate, ZnAl2O4, (or zinc gallate, ZnGa₂O₄), having a spine!structure. The product had a high surface area, 290 m²/g, and the TEM observation sh o wed the product was comprised of agglomerates of fine particles (diameter, ca.5 nm). T husobtained zinc aluminate maintained its large surface area at relatively high temperatures (up to 700°C), and therefore, it has potential use for catalyst materials.