Title

Application of nanostructured Ca doped CeO2 for ultraviolet filtration

RIS ID

33713

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.

Abstract

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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