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利用铝-空气电池放电产物制备了纳米氧化铝。研究了放电产物浸出所需的最适宜温度和酸的用量,反应物滴定速度对前驱体的影响以及煅烧条件对纳米氧化铝分散性的影响。结果表明,当m(浓硫酸)∶m(放电产物)=5∶2,浸出温度为100℃时放电产物能够完全溶解,硫酸铝的滴定速度小于16 mL/min时能够得到纯净的碳酸铝铵前驱体,前驱体先经300℃低温加热,然后经过1 200℃高温煅烧可以得到粒径在50 nm左右,单分散的α-Al_2O_3。
Nanometer alumina was prepared by using aluminum-air battery discharge product. The optimal temperature and the amount of acid required for the leaching of the discharge product, the influence of the titration rate of the reactant on the precursor, and the influence of calcination conditions on the dispersibility of the nano-alumina were investigated. The results show that the discharge products can be completely dissolved when the concentration of m (concentrated sulfuric acid): 5 (discharge product) = 5: 2 and the leaching temperature is 100 ℃. Pure aluminum ammonium carbonate can be obtained when the titration speed of aluminum sulfate is less than 16 mL / The precursors and precursors were first heated at 300 ℃ and then calcined at 1 200 ℃ to obtain monodispersed α-Al 2 O 3 with a particle diameter of about 50 nm.