DANTY, Paul; MAZEL, Antoine; CORMARY, Benoit; DE MARCO, Maria; ALLOUCHE, Joachim; FLAHAUT, Delphine; JIMÉNEZ-LAMANA, Javier; LACOMME, Sabrina; DELVILLE, Marie-Hélène; DRISKO, Glenna

doi:10.1021/acs.inorgchem.0c00358

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DANTY, Paul
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

MAZEL, Antoine
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

CORMARY, Benoit
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Article de revue

Ce document a été publié dans

Inorganic Chemistry. 2020-05-04, vol. 59, n° 9, p. 6232-6241

American Chemical Society

Résumé en anglais

Here, we present a new crystallization process which, by combining microwaves and metal-induced devitrification, reduces both the time and the temperature of crystallization compared to other known methods. Titania crystallization initiates at a temperature as low as 125 °C within a few minutes of microwave radiation. Several cations induce this low-temperature crystallization, namely, Mn2+, Co2+, Ni2+, Al3+, Cu2+ and Zn2+. The crystallization mechanism is probed with electron microscopy, elemental mapping, single-particle inductively coupled plasma mass spectrometry, X-ray photoelectron spectroscopy, Auger electron spectroscopy, and scanning Auger mapping. These techniques show that the metal ion migration through the vitreous titania under microwave radiation occurs prior to crystallization. The crystalline particles are suspended in solution at the end of the treatment, avoiding particle aggregation and sintering. The crystalline suspensions are thus ready for processing into a material or employment in any other application. This combination of microwaves and metal-induced crystallization is applied here to TiO2, but we are investigating its application to other materials as an ecofriendly crystallization method.< Réduire

Mots clés en anglais

anatase

microwave radiation

metal-induced crystallization

X-ray

Titania

DOI

http://dx.doi.org/10.1021/acs.inorgchem.0c00358

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Développement d'une infrastructure française distribuée coordonnée
Initiative d'excellence de l'Université de Bordeaux

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Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026