提出了一种可大规模制备CeO2纳米粉的有效方法.用碳化铈水解氧化制得颗粒大小为3～5 nm的CeO2纳米粉.研究了各种实验参数包括水解温度、反应时间和投料比对CeO2纳米粉比表面积的影响.结果表明:较低的水解温度(室温附近),较高的投料比(1∶20(g/mL))和适当的反应时间(18 h)可得到比表面积为149 m2/g的CeO2纳米粉.优化实验参数(水解温度为30℃,水解时间为18 h,投料比为1∶20(g/mL),滤饼在空气中80℃烘干4 h)得到中间产物Ce(OH)3和目标产物CeO2,并用XRD、TEM、SAED及紫外可见光分光光度计进行测试表征.发现Ce(OH)3是由大量长为50～100 nm,直径为5～20 nm的纳米棒组成.CeO2纳米粉具有较高的紫外吸收性能和较好的催化CO性能.
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