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OALib Journal期刊
ISSN: 2333-9721
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可控壳厚纳米ceo2中空球的制备、表征及其催化氧化性能
Keywords: ceo2中空球,壳厚,模板法,降解率
Abstract:
？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200nm,外径约为230--260nm,壳厚分别约为15、20、25和30nm,中空球壳层由大量粒径为5--10nm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2h后，对苯酚的降解率可达95%以上。
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