A simple procedure based on gelatification, promoted by the ring-opening reaction of propylene oxide, was proposed for the synthesis of alumina, in which hydrated aluminium nitrate ( Al ( NO3) 3 · 9H2O) was mixed with propylene oxide and gelated in ethanol solvent. 以水合硝酸铝(Al(NO3)3·9H2O)为前驱体,通过乙醇介质中环氧丙烷的开环反应促使形成了透明的块状氧化铝凝胶。