title: Efficient photocatalytic degradation of organics present in gas and liquid phases using Pt-TiO2/Zeolite (H-ZSM).
abstract: TiO2-encapsulated H-ZSM photocatalysts were prepared by physical mixing of TiO2 and zeolites. Pt was immobilized on the surface of the TiO2-encapsulated zeolite (H-ZSM) catalysts by a simple photochemical reduction method. Different weight ratios of both TiO2 and Pt were hybridized with H-ZSM and the catalytic performance of the prepared catalysts was investigated for 2-propanol oxidation in liquid phase and acetaldehyde in gas phase reaction. Around 5-10 wt% TiO2-encapsulated H-ZSM catalysts was found to be optimal amount for the effective oxidation of the organics. Prior to light irradiation, Pt-TiO2-H-ZSM showed considerable amount of catalytic degradation of 2-propanol in the dark, forming acetone as an intermediate. In this study, Pt has played a major and important role on the total oxidation of 2-propanol as well as acetaldehyde. As a result, no residual organics were present in the pores of the zeolites. The catalysts could be reused more than three times without losing their catalytic activity in both phases. The Pt-TiO2-H-ZSM photocatalysts could overcome the problem of strong adsorption of organics in the zeolite pores (after the reaction). Thus, Pt-TiO2-H-ZSM can be used as a potential catalyst for both liquid and gas phase oxidation of organic pollutants.
authors.affiliation: SRM-Research Institute, SRM University, Kattankulathur, Chennai, India. Electronic address: neppolian.b@res.srmuniv.ac.in.
authors.forename: B
authors.initials: B
authors.lastname: Neppolian
authors.affiliation: Department of Applied Chemistry, Osaka Prefecture University, Gakuen-Cho 1-1, Sakai, Osaka, 599-8531, Japan.
authors.forename: Shinya
authors.initials: S
authors.lastname: Mine
authors.affiliation: Department of Applied Chemistry, Osaka Prefecture University, Gakuen-Cho 1-1, Sakai, Osaka, 599-8531, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Horiuchi
authors.affiliation: Department of Chemistry, University of Milan, Via Golgi 19, 20133 Milano, Italy. Electronic address: claudia.bianchi@unimi.it.
authors.forename: C L
authors.initials: CL
authors.lastname: Bianchi
authors.affiliation: Department of Applied Chemistry, Osaka Prefecture University, Gakuen-Cho 1-1, Sakai, Osaka, 599-8531, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Matsuoka
authors.affiliation: Environmental Engineering and Science Program, Department of Biomedical, Chemical and Environmental Engineering, University of Cincinnati, USA.
authors.forename: D D
authors.initials: DD
authors.lastname: Dionysiou
authors.affiliation: Department of Applied Chemistry, Osaka Prefecture University, Gakuen-Cho 1-1, Sakai, Osaka, 599-8531, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Anpo
mesh_terms: D019840:2-Propanol / Q000737:chemistry*; D000079:Acetaldehyde / Q000737:chemistry*; D000327:Adsorption; D002384:Catalysis; D052918:Environmental Restoration and Remediation / Q000379:methods*; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D017641:Zeolites; C009495:titanium dioxide; D010984:Platinum; D014025:Titanium; D000079:Acetaldehyde; D019840:2-Propanol
keywords: Degradation; Gas phase oxidation; H-ZSM-5; Liquid phase; Pt; TiO(2)