Preparation method of gamma-aluminium oxide (Al2O3) nanofiber

Under 30 ~ 100 ℃ (a) aluminum-containing inorganic salt solution and an alkaline precipitating agent solution in accordance with the mixing volume ratio of 1/2 to 5 in: The present invention discloses a method for preparing γ-Al2O3 nano-fibers, comprising the steps of was reacted to obtain a suspension; (b) the suspension was filtered to obtain a cake, and then slurried in deionized water by filtering step the impurities, is removed to obtain a cake I; filtered (c) from step (b) is prepared I reprocessing cake in an organic solvent, and then filtered to recover the organic solvent to obtain a cake II; (D) from step (c) resulting filter cake baking process II 300 ~ 600 ℃, to obtain γ-Al2O3 nanofiber material. The preparation method is simple, industrially applicable, prepared by the γ-Al2O3 having a large pore size characteristics, large specific surface area.