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Abstract
Ce-doped SrFeO3 perovskite-type compounds are known as good thermocatalysts for the abatement of wastewater contaminants of emerging concern. In this work, Sr0.86Ce0.14FeO3–CeO2 perovskite-oxide systems with increasing amounts of cerium excess (0, 5, 10 and 15 mol% Ce), with respect to its maximum solubility in the perovskite, were prepared in one-pot by solution combustion synthesis and the effects of cerium excess on the chemical physical properties and thermocatalytic activity in the bisphenol A degradation were evaluated. The powders were characterized by powder X-ray diffraction combined with Rietveld refinement, X-ray photoelectron spectroscopy, thermal gravimetry, temperature programmed reduction, nitrogen adsorption, scanning electron microscopy and energy dispersive X-ray spectroscopy techniques. Results highlight that the perovskite structural, redox, surface, and morphological properties are affected by the in situ co-growth of the main perovskite phase and ceria and that a larger cerium excess has a beneficial effect on the thermocatalytic performance of the perovskite oxide–ceria biphasic system, although ceria is not active as a thermocatalyst itself. Perovskite properties and performance are enhanced by the tetragonal distortion induced by the introduction of cerium excess in the synthesis. It is supposed that a larger oxygen mobility and an easier reducibility are among the most relevant features that contribute to superior thermocatalytic properties of these perovskite oxide-based systems. These results also suggest new perspectives in the nanocomposite preparation and their catalytic applications.
Originalsprog | Engelsk |
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Tidsskrift | R S C Advances |
Vol/bind | 13 |
Udgave nummer | 31 |
Sider (fra-til) | 21459-21470 |
Antal sider | 12 |
ISSN | 2046-2069 |
DOI | |
Status | Udgivet - 17 jul. 2023 |
Bibliografisk note
This journal is © The Royal Society of Chemistry.Fingeraftryk
Dyk ned i forskningsemnerne om 'Beneficial effect of cerium excess on in situ grown Sr0.86Ce0.14FeO3–CeO2 thermocatalysts for the degradation of bisphenol A'. Sammen danner de et unikt fingeraftryk.Projekter
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Non-biological wastewater treatment with thermocatalytic membrane for simultaneous filtration and pollutant degradation
Jørgensen, M. K. (PI (principal investigator)), Jensen, H. C. (Projektdeltager), Boffa, V. (Projektdeltager) & Østergaard, M. B. (Projektdeltager)
01/11/2019 → 31/03/2022
Projekter: Projekt › Forskning