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Radiolytic Events in Nanostructured Aluminum Hydroxides

Josiane A Kaddissy 1 Stephane A Esnouf 2 Delphine A Durand 2 Dimitri A Saffre 3 Eddy A Foy 4, 5 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)
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)
5 IRAMAT - LMC - IRAMAT - Laboratoire Métallurgies et Cultures
IRAMAT - Institut de Recherches sur les Archéomatériaux
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.
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Submitted on : Thursday, May 11, 2017 - 8:15:41 AM
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Josiane A Kaddissy, Stephane A Esnouf, Delphine A Durand, Dimitri A Saffre, Eddy A Foy, et al.. Radiolytic Events in Nanostructured Aluminum Hydroxides. Journal of Physical Chemistry C, American Chemical Society, 2017, 121 (11), pp.6365 - 6373. ⟨10.1021/acs.jpcc.6b13104⟩. ⟨cea-01520778⟩



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