纳米棒
化学
高分辨率透射电子显微镜
催化作用
模板
化学工程
纳米管
纳米技术
化学反应
分子
碳纳米管
透射电子显微镜
有机化学
材料科学
工程类
作者
Guozhu Chen,Caixia Xu,Xinyu Song,Wei Zhao,Yi Ding,Siao Sun
摘要
CeO(2) nanotubes have been synthesized with a simple solid-liquid interface reaction route in the absence of any surfactants. Although the basic reaction principles are similar, two kinds of nanotubes with completely different morphologies and structures can be generated by slightly tuning the postprocessing conditions. The first formation involves employing Ce(OH)CO(3) nanorods as both the physical and chemical templates, and the other requires layered Ce(OH)3 as an anisotropic intermediate species. During this process, NaOH and reaction temperature were demonstrated as the key factors responsible for the formation of Ce(OH)(3) intermediate and final CeO(2) nanotubes with well-defined structures. The structural details were provided by a combination of XRD, SEM, TEM, and HRTEM investigations. Catalytic measurement shows that both nanotubes are very active for CO oxidation, and at 250 degrees C, the conversion rates of CeO(2) nanotubes are 3 times higher than that of the bulk counterpart.
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