title: Beta zeolite supported sol-gel TiO2 materials for gas phase photocatalytic applications.
abstract: Beta zeolite supported sol-gel TiO(2) photocatalytic materials were prepared according to a sol-gel route in which high specific surface area Beta zeolite powder was incorporated into the titanium isopropoxide sol during the course of the sol-gel process. This led to an intimate contact between the zeolite surface and the TiO(2) precursors, and resulted in the anchorage of large amounts of dispersed TiO(2) nanoparticles and in the stabilization of TiO(2) in its anatase form, even for high TiO(2) wt. contents and high calcination temperatures. Taking the UV-A photocatalytic oxidation of methanol as gas phase target reaction, high methanol conversions were obtained on the Beta zeolite supported TiO(2) photocatalysts when compared to bulk sol-gel TiO(2), despite lower amounts of TiO(2) within the photoactive materials. The methanol conversion was optimum for about 40 wt.% TiO(2) loading and calcination temperatures of 500-600°C.
authors.affiliation: Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse, CNRS, University of Strasbourg, 25 rue Becquerel 67087, Strasbourg, France.
authors.forename: Mama
authors.initials: M
authors.lastname: Lafjah
authors.forename: Fatiha
authors.initials: F
authors.lastname: Djafri
authors.forename: Abdelkader
authors.initials: A
authors.lastname: Bengueddach
authors.forename: Nicolas
authors.initials: N
authors.lastname: Keller
authors.forename: Valérie
authors.initials: V
authors.lastname: Keller
mesh_terms: D000537:Aluminum Oxide; D002384:Catalysis; D005740:Gases; D005782:Gels; D000432:Methanol / Q000737:chemistry; D010084:Oxidation-Reduction; D010316:Particle Size; D010777:Photochemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction; D017641:Zeolites / Q000737:chemistry*
chemical_list: D005740:Gases; D005782:Gels; D017641:Zeolites; C009495:titanium dioxide; D014025:Titanium; D000537:Aluminum Oxide; D000432:Methanol