摘要: The photocatalytic properties of deposited tantalum oxide (Ta2O5) on silica, in the reaction oxidation cyclohexane by oxygen, have been studied. this catalyst were compared with those previously studied system V2O5/SiO2, and it was concluded that mobilities V+5 Ta+5 ions surface silica under radiation arc verymuch different. This study completed an analysis diffuse reflectance spectra a thermogravimetric used catalysts. conclusion site active reaction, is hydrated during cyclohexane. On etudie les proprietes d'un nouveau photocatalyseur constitue par un depǒt d'oxyde de Tantale Ta2O5 sur la silice, dans d'oxydation photocatalytique du l'oxygene. On compare ce catalyseur avec celles V2O5/SiO2 precedemment et conclut des differences mobilite cations rapport silice sous le rayonnement. Cette etude est completee une analyse spectres thermogravimetrique catalyseurs apres differents temps d'utilisation. l'hydratation actif en photocatalyse, qui se produit au cours cyclohexane.
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