Growth of monodisperse nanocrystals of cerium oxide during synthesis and annealing

被引：0
作者：
Swapankumar Ghosh
Damodaran Divya
Kottayilpadi C. Remani
Thadathil S. Sreeremya
机构：
[1] National Institute for Interdisciplinary Science and Technology (NIIST),Department of Chemistry
[2] Council of Scientific and Industrial Research (CSIR),undefined
[3] Sree Neelakanda Government Sanskrit College,undefined
来源：
Journal of Nanoparticle Research | 2010年 / 12卷
关键词：
Cerium dioxide; Monodisperse; Nanocrystal; Growth; Kinetics;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Monodisperse cerium oxide nanocrystals have been successfully synthesised using simple ammonia precipitation technique from cerium(III) nitrate solution at different temperatures in the range 35–80 °C. The activation energy for growth of CeO2 nanocrystals during the precipitation is calculated as 11.54 kJ/mol using Arrhenius plot. Average crystal diameter was obtained from XRD analysis, HR-TEM and light scattering (PCS). The analysis of size data from HR-TEM images and PCS clearly indicated the formation of highly crystalline CeO2 particles in narrow size range. CeO2 nanocrystals precipitated at 35 °C were further annealed at temperatures in the range 300–700 °C. The activation energy for crystal growth during annealing is also calculated and is close to the reported values. An effort is made to predict the mechanism of crystal growth during the precipitation and annealing.
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页码：1905 / 1911
页数：6
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