以十六烷基三甲基溴化铵(CTAB)为模板剂,采用水热法合成了中孔氧化锆,依次用磷酸和水合氯化铝溶液对其进行后处理,得到了具有高热稳定性、高有序性的中孔Zr-P-Al材料. 样品的XRD,TEM 和氮气物理吸附测试结果表明,反应凝胶中的水量和陈化条件对样品结构有很大影响. 当反应凝胶配比为Zr(SO4)2∶CTAB∶H2O＝1∶0.27∶240时,所得样品具有较规整的六方结构. 此样品经磷酸处理后,有序程度进一步提高. 将磷酸处理过的样品再用水合氯化铝溶液处理,得到的材料具有典型的中孔特征和很高的热稳定性. 最终产物经过700 ℃焙烧后具有416 m2/g 的比表面积,孔容积较大,孔径分布均匀,800 ℃焙烧后其比表面积仍可达到227 m2/g. 样品的高稳定性来源于锆、磷和铝之间的相互作用.
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