以硫酸铝铵(NH4Al(SO4)2)和碳酸氢铵(NH4HCO3)为主要原料,采用沉淀法制备纳米碳酸铝铵(AACH)前驱体,并利用X射线衍射(XRD),透射电镜(TEM)对前驱体的物相和形貌进行表征.研究表明,滴定速度和陈化时间对前驱体的形貌略有影响,而滴定方式和pH值对其影响较大.将硫酸铝铵溶液滴入碳酸氢铵溶液中,调节体系的pH值9-10,并将其陈化12小时,可以得到较好的前驱体.
Ammonium aluminum carbonate hydroxide (AACH) nanopowder was prepared via a precipitation reaction between ammonium aluminum sulphate (NH4 Al(SO4)2) and ammonium hydrogen carbonate (NH4 HCO3) in different conditions.The precursors were characterized by X-ray diffraction (XRD),transmission electron microscopy (TEM).The results show that titration rate and aging time affected the morphology of precursors a bit,and titration mode and pH value affected the composition of precursors greatly.The optimum process was that NH4 Al(SO4)2 solution was added into NH4 HCO3 solution at pH 9-10 with aging time of 12h.
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