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Communication Dans Un Congrès Année : 2015

Brookite and rutile powders as efficient photocatalysts for air and water depolluting treatment

G. Damia
  • Fonction : Auteur
S. Cassaignon
  • Fonction : Auteur
O. Durupthy
  • Fonction : Auteur
C. Colbeau-Justin
A. Herissan
  • Fonction : Auteur

Résumé

Understand the differences between the various polymorphs of TiO2, anatase, rutile and brookite, constitutes an extensive work since nearly 40 years. However, it still remains an important technical lock to solve in order to explain and improve the photocatalytic efficiency. In this way, our researches were dedicated, in a first step, to the synthesis of very well defined morphology of the three TiO2 phases with mastered shape and chemical composition [1]. Then, their photocatalytic activity in aqueous and gaseous phase was characterized using several models pollutant (formic acid, phenol and toluene). Some efficiency was correlated to the electronic properties using Time Resolved Microwave Conductivity (TRMC) [2]. These results allow us to compare the photocatalysts in the same controlled conditions. Thus a classification is realized according to the TiO2 phase and the photocatalytic activity. We highlight that similar distribution is obtained whatever the pollutant type and the studied phase (air or water). Moreover, interesting rutile and brookite powders were synthesized presenting similar or better photocatalytic activity than TiO2-P25 (Evonik), considered as the actual best commercial photocatalyst [3].
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Dates et versions

hal-01180635 , version 1 (27-07-2015)

Identifiants

  • HAL Id : hal-01180635 , version 1

Citer

G. Damia, C. Guillard, S. Cassaignon, O. Durupthy, C. Colbeau-Justin, et al.. Brookite and rutile powders as efficient photocatalysts for air and water depolluting treatment. SP5 (5th International Conference on Semiconductor Photochemistry, Jul 2015, Saint Petersbourg, Russia. ⟨hal-01180635⟩
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