以Al(NO3)3·9H2O和Ce(NO3)3·6H2O为原料,氨水为pH值调节剂,并加入少量表面活性剂PEG4000,采用化学共沉淀法制备了前驱体,前驱体经高温热处理得到含25%(质量分数)CeO2的CeO2/γ-Al2O3 复合纳米晶.通过正交试验,获得了共沉淀的优化条件:pH值为9～10,反应温度约30℃,反应时间为20min,表面活性剂用量为0.44%(质量分数),前驱体热处理温度800℃为宜.使用TG/DTA、XRD、BET、IR、纯度及化学成分分析等方法对CeO2/γ-Al2O3 复合纳米晶的性能进行了表征.
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