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oai:docta.ucm.es:20.500.14352/1005312024-08-28T23:49:20Zcom_20.500.14352_14col_20.500.14352_15

Fernández Castillo, Jesús Isasi Marín, Josefa Pérez Estébanez, Marta Aldama, Iván Arévalo, Pablo Díaz-Guerra Viejo, Carlos 2024-02-08T16:06:04Z 2024-02-08T16:06:04Z 2011 Castillo, J. F., et al. «Structural and Cathodoluminiscent Properties of Zr0.95Ce0.05O2 Nanopowders Prepared by Sol–Gel and Template Methods». Journal of Luminescence, vol. 131, n.o 10, octubre de 2011, pp. 2128-32. https://doi.org/10.1016/j.jlumin.2011.05.016. 0022-2313 10.1016/j.jlumin.2011.05.016 https://hdl.handle.net/20.500.14352/100531 https://doi.org/10.1016/j.jlumin.2011.05.016 Nanopowders of Zr0.95Ce0.05O2 composition have been prepared by a standard Pechini-type sol–gel process and by means of a colloidal crystal template approach. In the latter method, inverse opal Zr0.95Ce0.05O2 powders were fabricated employing poly(methylmethacrylate) (PMMA) colloidal crystals as a template.The effects of the two different synthesis routes on the structure and microstructural characteristics of the prepared nanopowders were evaluated by X-ray diffraction and scanning electron microscopy. For both preparation routes, the X-ray diffraction analysis has shown that a tetragonal fluorite structure is formed with a crystallite size of 35–40 nm. The scanning electron microscopy measurements indicate that the powder obtained by the sol–gel Pechini-type process is comprised of nanoparticles that are arranged in agglomerates with shape and size relatively uniform whereas the inverse opal Zr0.95Ce0.05O2 nanopowders exhibit the formation of macropores with a mean size of 100 nm. The cathodoluminescence spectra of the prepared Zr0.95Ce0.05O2 nanomaterials have been measured in the 300–800 nm wavelength range. The powder prepared by sol–gel method yields a broad emission band centered at 482nm whereas the emission from the inverse opal preparation is considerably less intense. eng http://creativecommons.org/licenses/by/4.0/ restricted access Attribution 4.0 International Structural and cathodoluminiscent properties of Zr0.95Ce0.05O2 nanopowders prepared by sol–gel and template methods journal article