title: Enhanced photocatalytic degradation of atrazine by platinized titanium dioxide under 352 nm irradiation.
abstract: Simply coating 1 wt.% of platinum on titanium dioxide (TiO2) surface resulted in simple preparation of platinized TiO2(Pt-TiO2). This study demonstrated the photodegradation of atrazine (ATZ) using either Pt-TiO2or TiO2as a photocatalyst under 352 nm light irradiation. The Pt-TiO2-catalyzed ATZ degradation reached 76% in 3 hours without adding H2O2solution or aeration, which was more than 10% higher than the TiO2-catalyzed reaction. The decomposition product of Pt-TiO2-catalyzed ATZ degradation was mainly cyanuric acid. Thus, Pt-TiO2as an effective photocatalyst has three main advantages in the photodegradation of ATZ under 352 nm irradiation. First, the coated Pt can facilitate the generation of appropriate amounts of OH radicals, so it can prevent the formation of over-oxidized TiO2. Second, aeration was not needed. Third, the excited electrons were mainly uni-directionally transferred to the catalyst surface to avoid recombination of electron-hole pairs.
authors.affiliation: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan.
authors.forename: Shen-Ming
authors.initials: SM
authors.lastname: Chen
authors.affiliation: Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan E-mail: normanlu@mail.ntut.edu.tw.
authors.forename: Norman
authors.initials: N
authors.lastname: Lu
authors.affiliation: Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan E-mail: normanlu@mail.ntut.edu.tw.
authors.forename: Jun-Yu
authors.initials: JY
authors.lastname: Chen
authors.affiliation: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan.
authors.forename: Cheng-Yu
authors.initials: CY
authors.lastname: Yang
authors.affiliation: Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan E-mail: normanlu@mail.ntut.edu.tw.
authors.forename: Yun-Peng
authors.initials: YP
authors.lastname: Yeh
authors.affiliation: Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan E-mail: normanlu@mail.ntut.edu.tw.
authors.forename: Tsung-Yao
authors.initials: TY
authors.lastname: Feng
authors.affiliation: Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan.
authors.forename: Yang-Hsin
authors.initials: YH
authors.lastname: Shih
authors.affiliation: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan.
authors.forename: Thangavelu
authors.initials: T
authors.lastname: Kokulnathan
authors.affiliation: Department of Civil and Mechanical Engineering, Indiana University-Purdue University, 2101 E Coliseum Blvd, Fort Wayne, IN 46805, USA.
authors.forename: Dong
authors.initials: D
authors.lastname: Chen
mesh_terms: D001280:Atrazine / Q000737:chemistry / Q000528:radiation effects*; D002384:Catalysis / Q000528:radiation effects; D006861:Hydrogen Peroxide / Q000737:chemistry; D007700:Kinetics; D046529:Microscopy, Electron, Transmission; D010084:Oxidation-Reduction; D010782:Photolysis; D010984:Platinum / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014025:Titanium / Q000528:radiation effects*; D014227:Triazines / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D014227:Triazines; C009495:titanium dioxide; D010984:Platinum; D006861:Hydrogen Peroxide; D014025:Titanium; C004632:cyanuric acid; D001280:Atrazine