Application of nanostructured Ca doped CeO2 for ultraviolet filtration



Publication Details

Truffault, L, Ta, M, Devers, T, Konstantinov, KK, Harel, V, Simmonard, C, Andreazza, C, Nevirkovets, I, Pineau, A, Veron, O & Blondeau, J (2010), Application of nanostructured Ca doped CeO2 for ultraviolet filtration, Materials Research Bulletin, 45(5), pp. 527-535.


Calcium doped CeO2 nanoparticles with doping concentrations between 0 and 50 mol% were synthesized by a co-precipitation method for ultraviolet filtration application. Below 20 mol% doping concentration, the samples were single-phase. From 30 mol%, CaCO3 appears as a secondary phase. The calculated CeO2 mean crystallite size was 9.3 nm for the pure and 5.7 nm for the 50 mol% Ca-doped sample. Between 250 and 330 nm, the absorbance increased for the 10, 30, and 40 mol% Ca-doped samples compared to the pure one. The band-gap was found to be 3.20 eV for the undoped, and between 3.36 and 3.51 eV for the doped samples. The blue shifts are attributed to the quantum confinement effect. X-ray photoelectron spectroscopy showed that the Ce3+ atomic concentration in the pure sample was higher than that of the 20 mol% Ca-doped sample.

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