title: Long-term aging of a CeO(2) based nanocomposite used for wood protection.
abstract: A multi-scale methodology was used to characterize the long-term behavior and chemical stability of a CeO2-based nanocomposite used as UV filter in wood stains. ATR-FTIR and (13)C NMR demonstrated that the citrate coated chelates with Ce(IV) through its central carboxyl- and its α-hydroxyl- groups at the surface of the unaged nanocomposite. After 42 days under artificial daylight, the citrate completely disappeared and small amount of degradation products remained attached to the surface even after 112 days. Moreover, the release/desorption of the citrate layer led to a surface reorganization of the nano-sized CeO2 core observed by XANES (Ce L3-edge). Such a surface and structural transformation of the commercialized nanocomposite could have implications in term of fate, transport, and potential impacts towards the environment.
authors: CNRS, Aix-Marseille Université, CEREGE UM34, UMR 7330, 13545 Aix en Provence, France; International Consortium for the Environmental Implications of Nanotechnology iCEINT, Aix en Provence, France. Electronic address: auffan@cerege.fr.
authors: Melanie
authors: M
authors: Auffan
authors: CNRS, Aix-Marseille Université, CEREGE UM34, UMR 7330, 13545 Aix en Provence, France; International Consortium for the Environmental Implications of Nanotechnology iCEINT, Aix en Provence, France.
authors: Armand
authors: A
authors: Masion
authors: CNRS, Aix-Marseille Université, CEREGE UM34, UMR 7330, 13545 Aix en Provence, France; International Consortium for the Environmental Implications of Nanotechnology iCEINT, Aix en Provence, France.
authors: Jerome
authors: J
authors: Labille
authors: CNRS, Aix-Marseille Université, CEREGE UM34, UMR 7330, 13545 Aix en Provence, France; International Consortium for the Environmental Implications of Nanotechnology iCEINT, Aix en Provence, France.
authors: Marie-Ange
authors: MA
authors: Diot
authors: CNRS, Aix-Marseille Université, CEREGE UM34, UMR 7330, 13545 Aix en Provence, France; International Consortium for the Environmental Implications of Nanotechnology iCEINT, Aix en Provence, France.
authors: Wei
authors: W
authors: Liu
authors: Elettra-Sincrotrone, 34149 Basovizza, Trieste, Italy.
authors: Luca
authors: L
authors: Olivi
authors: International Consortium for the Environmental Implications of Nanotechnology iCEINT, Aix en Provence, France; OSUG, Observatoire des Sciences de l'Univers de Grenoble, France.
authors: Olivier
authors: O
authors: Proux
authors: Fédération Sciences Chimiques FR-CNRS 1739, Aix-Marseille Univ, 13013 Marseille, France.
authors: Fabio
authors: F
authors: Ziarelli
authors: CNRS, Aix-Marseille Université, CEREGE UM34, UMR 7330, 13545 Aix en Provence, France; International Consortium for the Environmental Implications of Nanotechnology iCEINT, Aix en Provence, France.
authors: Perrine
authors: P
authors: Chaurand
authors: IRCELYON, UMR 5256, CNRS, Université Lyon 1, 69626 Villeurbanne, France.
authors: Christophe
authors: C
authors: Geantet
authors: CNRS, Aix-Marseille Université, CEREGE UM34, UMR 7330, 13545 Aix en Provence, France; International Consortium for the Environmental Implications of Nanotechnology iCEINT, Aix en Provence, France.
authors: Jean-Yves
authors: JY
authors: Bottero
authors: CNRS, Aix-Marseille Université, CEREGE UM34, UMR 7330, 13545 Aix en Provence, France; International Consortium for the Environmental Implications of Nanotechnology iCEINT, Aix en Provence, France.
authors: Jerome
authors: J
authors: Rose
mesh_terms: D002563:Cerium / Q000737:chemistry*; D019343:Citric Acid / Q000032:analysis; D053761:Nanocomposites / Q000737:chemistry*; D013472:Sunlight; D014887:Weather; D014934:Wood
chemical_list: D019343:Citric Acid; D002563:Cerium; C030583:ceric oxide
keywords: Degradation; Environment; Exposure; Nanomaterials