Radiolytic Events in Nanostructured Aluminum Hydroxides

Josiane Kaddissy; Stephane Esnouf; Delphine Durand; Dimitri Saffre; Eddy Foy; Jean-Philippe Renault

doi:10.1021/acs.jpcc.6b13104

Radiolytic Events in Nanostructured Aluminum Hydroxides

Josiane Kaddissy ¹ Stephane Esnouf ² Delphine Durand ² Dimitri Saffre ³ Eddy Foy ⁴ Jean-Philippe Renault ¹

1 LIONS - Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire

NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)

2 SECR - Service d'Etudes du Comportement des Radionucléides

DPC - Département de Physico-Chimie : DEN/DPC

3 AREVA TNI

4 LAPA - UMR 3685 - Laboratoire Archéomatériaux et Prévision de l'Altération

NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)

Abstract : The radiolysis of nanosized Al(OH) 3 and AlOOH has been examined. Irradiations were performed using electron beams. H 2 radiolytic yields were determined with respect to structure and particle size. The measured yields have an order of magnitude of 10 −9 mol J −1 , which decreases when particle size is lowered. Surface and structure analysis techniques were used to detect any change before and after irradiation, and no differences were seen. Annealing experiments showed that a significant amount of molecular hydrogen was trapped inside AlOOH and Al(OH) 3. H radicals, F centers, O − and O 3 − centers were identified by electron paramagnetic resonance (EPR) spectroscopy. A significant part of the absorbed energy remains stored into the nanomaterials and induces a secondary H 2 production upon heating.

Type de document :

Article dans une revue

Journal of Physical Chemistry C, American Chemical Society, 2017, 121 (11), pp.6365 - 6373. 〈http://dx.doi.org/10.1021/acs.jpcc.6b13104〉. 〈10.1021/acs.jpcc.6b13104〉

Domaine :

Chimie / Matériaux

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https://hal-cea.archives-ouvertes.fr/cea-01520778
Contributeur : Serge Palacin <>
Soumis le : jeudi 11 mai 2017 - 08:15:41
Dernière modification le : lundi 15 octobre 2018 - 16:36:00

Radiolytic Events in Nanostructured Aluminum Hydroxides

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