以聚苯乙烯微球为模板制备PS/CeO2复合颗粒, 再通过煅烧去除PS内核形成CeO2纳米中空球, 并通过控制反应液中硝酸铈的浓度来最终控制中空球的壳厚。 用TEM、FESEM、SAED、FTIR、DLS等手段, 对所制备样品的物相结构、形貌和粒径分布进行了表征。结果表明, CeO2中空球内径约为200 nm, 外径约为230--260 nm, 壳厚分别约为15、20、25和30 nm, 中空球壳层由大量粒径为5--10 nm的纳米CeO2颗粒紧密堆积所组成。经CeO2中空球催化臭氧氧化处理2 h后，对苯酚的降解率可达95%以上。
CeO2 hollow microspheres with controlled shell thickness were synthesized via a simple polystyrene sphere template method. The as-synthesized products were characterized by TEM, FESEM, SAED, FTIR and DLS. The degradating performance of the CeO2 hollow microspheres on phenol was investigated. The results indicate that the CeO2 hollow microspheres with the external diameter approximately of 230–260 nm and the internal diameter of 200 nm possess thin shell composed of loosely packed CeO2 nanoparticles (particle diameter of 5–10 nm). The shell thickness of CeO2 hollow microspheres can be controlled from 15 to 30 nm by adjusting the concentration of Ce(NO3)3·6H2O in the reaction solution. The degradation rate of CeO2 hollow microspheres can reach to 95% for the phenol.
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