Engineering of nanoscale defect patterns in CeO2 nanorods via ex situ and in situ annealing.
Engineering of nanoscale defect patterns in CeO2 nanorods via ex situ and in situ annealing.
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DOI：
10.1039/c4nr07308h
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发表时间：
2015-03
期刊：
影响因子：
6.7
通讯作者：
T. Sakthivel;D. Reid;U. Bhatta;G. Möbus;D. Sayle;S. Seal
中科院分区：
文献类型：
--
作者：
T. Sakthivel;D. Reid;U. Bhatta;G. Möbus;D. Sayle;S. Seal
采用水热法制备了单晶氧化铈纳米棒，并在325 °C-800 °C下退火。合成的CeO 2纳米棒含有高浓度的缺陷，如氧空位和高晶格应变。退火导致晶格晶体质量沿着改善，同时在具有多面体形态的纳米棒中形成新的腔形缺陷，并由例如{111}和{100}（内）表面结合，这对于空气（非原位）和真空（原位）加热都得到了证实。我们假设，空腔的发展，通过聚集的空位内合成的纳米棒。
Single-crystalline ceria nanorods were fabricated using a hydrothermal process and annealed at 325 °C-800 °C. As-synthesized CeO2 nanorods contain a high concentration of defects, such as oxygen vacancies and high lattice strains. Annealing resulted in an improved lattice crystalline quality along with the evolution of novel cavity-shaped defects in the nanorods with polyhedral morphologies and bound by e.g. {111} and {100} (internal) surfaces, confirmed for both air (ex situ) and vacuum (in situ) heating. We postulate that the cavities evolve via agglomeration of vacancies within the as-synthesized nanorods.