Abstract
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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Acknowledgements
This study was supported by the Indian Rare Earths Limited Technology Development Council (IRELTDC), DAE, India. We thank Department of Science and Technology (DST) and CSIR India for providing HR-TEM facility to NIIST. MMD (X-Ray), HR-TEM and SEM staff are kindly acknowledged for their assistance in obtaining XRD and electron microscopy data.
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Ghosh, S., Divya, D., Remani, K.C. et al. Growth of monodisperse nanocrystals of cerium oxide during synthesis and annealing. J Nanopart Res 12, 1905–1911 (2010). https://doi.org/10.1007/s11051-009-9753-4
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DOI: https://doi.org/10.1007/s11051-009-9753-4