1995 Volume 21 Issue 6 Pages 1054-1059
In order to obtain metal oxides having high specific surface areas for catalysts, preparation of metal oxides by using organic acids was investigated. Metal oxides such as MgO, La2O3, CeO, and NiO were prepared by heat treatment of precursors which had been obtained by melting a mixture of respective metal salts and organic acids at 343K. Hydroxycarboxyllic acids such as citric acid and lactic acid, as well as amino acids such as glycine, were effective in producing materials which had high specific surface areas. For example, the specific surface areas of the magnesia prepared by using hydroxicarboxyllic acids were higher than those prepared by the precipitation method. Compared with MgO prepared by pyrolysis of magnesium nitrate, SEM observation and pore size distribution indicate that MgO prepared by this method has a characterstic shape and mesopores formed by elimination of organic acids.