标题：Formation of catalytically active CeO2 hollow nanoparticles guided by oriented attachment
作者：Wei, Jingjing; Wang, Shuping; Sun, Simou; Yang, Zhijie; Yang, Yanzhao
作者机构：[Wei, Jingjing; Wang, Shuping; Sun, Simou; Yang, Zhijie; Yang, Yanzhao] Shandong Univ, Key Lab Special Funct Aggregate Mat, Educ Minist, Sch Chem & Ch 更多
通讯作者地址：[Yang, YZ]Shandong Univ, Key Lab Special Funct Aggregate Mat, Educ Minist, Sch Chem & Chem Engn, 27 Shanda Nanlu, Jinan 250100, Shandong, Peoples R Ch 更多
关键词：Nanoparticles; Crystal growth; Porous materials; CeO2
摘要：Monodisperse CeO2 hollow nanoparticles were synthesized by a template-free hydrothermal method. The average size of the nanoparticles was measured to be 75 nm. Detailed experiments revealed that the CeO2 hollow nanoparticles were formed directly by oriented attachment of the initial CeO2 nanocrystals. Although Cu2+ was introduced into the system, the final CeO2 product was free of Cu species, which was confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectrum (XPS) studies. Furthermore, the as-prepared CeO2 hollow nanoparticles revealed superior catalytic activity toward CO oxidation compared to commercial CeO2 fine powders. It may provide a new path for the fabrication of inorganic hollow structures upon introducing alien metal ions. (C) 2012 Elsevier B.V. All rights reserved.