title: Preparation of a titania/X-zeolite/porous glass composite photocatalyst using hydrothermal and drop coating processes.
abstract: Combinations of TiO2 photocatalysts and various adsorbents have been widely studied for the adsorption and photocatalytic decomposition of gaseous pollutants such as volatile organic compounds (VOCs). Herein, a TiO2-zeolite-porous glass composite was prepared using melt-quenching and partial sintering, hydrothermal treatment, and drop coating for preparation of the porous glass support and X-zeolite and their combination with TiO2, respectively. The obtained composite comprised anatase phase TiO2, X-zeolite, and the porous glass support, which were combined at the micro to nanometer scales. The composite had a relatively high specific surface area of approximately 25 m2/g and exhibited a good adsorption capacity for 2-propanol. These data indicated that utilization of this particular phase-separated glass as the support was appropriate for the formation of the bulk photocatalyst-adsorbent composite. Importantly, the photocatalytic decomposition of adsorbed 2-propanol proceeded under UV light irradiation. The 2-propanol was oxidized to acetone and then trapped by the X-zeolite rather than being released to the atmosphere. Consequently, it was demonstrated that the micrometer-scaled combination of TiO2 and zeolite in the bulk form is very useful for achieving both the removal of gaseous organic pollutants and decreasing the emission of harmful intermediates.
authors: Department of Materials Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan. yasumori@rs.noda.tus.ac.jp.|Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan. yasumori@rs.noda.tus.ac.jp.
authors: Atsuo
authors: A
authors: Yasumori
authors: Department of Materials Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan. YANAGIDA.Sayaka@nims.go.jp.|Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan. YANAGIDA.Sayaka@nims.go.jp.
authors: Sayaka
authors: S
authors: Yanagida
authors: Department of Materials Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan. bb_is_my_life_tr@yahoo.co.jp.
authors: Jun
authors: J
authors: Sawada
mesh_terms: D000433:1-Propanol / Q000737:chemistry; D000327:Adsorption; D002384:Catalysis; D005898:Glass / Q000737:chemistry*; D055668:Photochemical Processes; D016062:Porosity; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction; D017641:Zeolites / Q000737:chemistry*
chemical_list: D017641:Zeolites; C009495:titanium dioxide; D000433:1-Propanol; D014025:Titanium
references: J Am Chem Soc. 2007 Apr 18;129(15):4538-9
references: 17381091
references: Environ Sci Technol. 1995 May 1;29(5):1223-31
references: 22192015
references: Langmuir. 2005 Apr 12;21(8):3486-92
references: 15807592
references: J Phys Chem B. 2003 Jul 10;107(27):6586-9
references: 26312415
references: J Air Waste Manag Assoc. 2009 Oct;59(10):1186-93
references: 19842326
references: ACS Nano. 2010 Dec 28;4(12):7303-14
references: 21117654
references: Molecules. 2014 Oct 13;19(10):16477-88
references: 25314607
references: Chem Rev. 2012 Nov 14;112(11):5919-48
references: 23088691
references: ACS Nano. 2010 Jan 26;4(1):380-6
references: 20041631
references: ACS Appl Mater Interfaces. 2010 Feb;2(2):498-503
references: 20356197
references: Phys Chem Chem Phys. 2014 Dec 7;16(45):25004-7
references: 25328126
references: Chem Commun (Camb). 2004 Jul 7;(13):1443-59
references: 15216329