http://www.cnr.it/ontology/cnr/individuo/prodotto/ID47926

Innovative approaches to oxide nanosystems: CeO2-ZrO2 nanocomposites by a combined PE-CVD/Sol-Gel route (Articolo in rivista)

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Innovative approaches to oxide nanosystems: CeO2-ZrO2 nanocomposites by a combined PE-CVD/Sol-Gel route (Articolo in rivista) (literal)

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L. Armelao, D. Barreca, G. Bottaro, A. Gasparotto, E. Tondello, M. Ferroni, S. Polizzi (2004)
Innovative approaches to oxide nanosystems: CeO2-ZrO2 nanocomposites by a combined PE-CVD/Sol-Gel route
in Chemical vapor deposition (Print)
(literal)

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L. Armelao, D. Barreca, G. Bottaro, A. Gasparotto, E. Tondello, M. Ferroni, S. Polizzi (literal)

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1,2: Molecular Sciences and Technologies Institute - CNR - INSTM - Department of Chemistry - Padova University - Via Marzolo, 1 - Padova (Italy) 3,4,5: Department of Chemistry and INSTM - Padova University - Via Loredan, 4 - Padova (Italy) 6: Physical Chemistry Department and INFM- UdR Venezia - Ca' Foscari Venice University - Via Torino, 155/B - Venezia-Mestre (Italy) 7: Physical Chemistry Department - Ca' Foscari Venice University - Via Torino, 155/B - Venezia-Mestre (Italy) (literal)

Titolo

Innovative approaches to oxide nanosystems: CeO2-ZrO2 nanocomposites by a combined PE-CVD/Sol-Gel route (literal)

Abstract

A novel combined PE-CVD/Sol-Gel approach to oxide based nanosystems is proposed and employed for the synthesis of CeO2-ZrO2 nanocomposites. The adopted strategy consists in the Plasma-Enhanced Chemical Vapour Deposition (PE-CVD) of ceria (guest) on a zirconia xerogel ZrOx(OH)y (host) prepared by Sol-Gel (SG), at temperatures as low as 200°C. The system evolution under annealing in air (600 and 900°C, 1 h) and its mutual relationships with the synthesis conditions is investigated in detail by a multi-technique characterization. The proposed synthetic pathway enables the synthesis of CeO2-ZrO2 nanostructured systems ranging from composites to solid solutions, as a function of thermal treatment and Ce/Zr relative content. In this framework, particular attention is devoted to achieving an intimate Ce/Zr intermixing by exploiting the synergy between the SG xerogel properties (porosity, -OH content) and the peculiar actions exerted by plasma (ablation/deposition, infiltration power). Such features enable an in-depth penetration of ceria into the inner zirconia xerogel layers already in the as-grown systems. (literal)

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