title: Efficient removal of toluene and benzene in gas phase by the TiO2/Y-zeolite hybrid photocatalyst.
abstract: Efficient removal of toluene or benzene molecules thinly diffused in gas phase was achieved by using TiO(2)/Y-zeolite hybrid photocatalysts. TiO(2) of 10 wt% hybridized with a hydrophobic USY zeolite showed higher photocatalytic reactivity as compared to TiO(2) hybridized with hydrophilic H-Y or Na-Y zeolites. This phenomenon can be explained by the fact that the hydrophobic USY zeolite efficiently adsorbs the organic compounds and smoothly supplies them onto the TiO(2) photocatalyst surface. However, the toluene or benzene molecules, which are strongly trapped on the hydrophilic H(+) or Na(+) sites of zeolite, cannot diffuse onto the TiO(2) surfaces, resulting in lower photocatalytic reactivity. Although the adsorption capacity of the pure TiO(2) sample rapidly deteriorated, the TiO(2)/Y-zeolite hybrid system maintained a high adsorption efficiency to remove such aromatic compounds for a long period.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan. masato-t@chem.osakafu-u.ac.jp
authors.forename: Masato
authors.initials: M
authors.lastname: Takeuchi
authors.forename: Manabu
authors.initials: M
authors.lastname: Hidaka
authors.forename: Masakazu
authors.initials: M
authors.lastname: Anpo
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000737:chemistry* / Q000528:radiation effects; D001554:Benzene / Q000737:chemistry* / Q000528:radiation effects; D002384:Catalysis; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000528:radiation effects; D055668:Photochemical Processes; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects; D014050:Toluene / Q000737:chemistry* / Q000528:radiation effects; D014466:Ultraviolet Rays; D015019:Yttrium / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry / Q000528:radiation effects
chemical_list: D000393:Air Pollutants; D017641:Zeolites; C009495:titanium dioxide; D014050:Toluene; D015019:Yttrium; D014025:Titanium; D001554:Benzene