title: Heterogeneous photo-Fenton degradation of polyacrylamide in aqueous solution over Fe(III)-SiO(2) catalyst.
abstract: This article presents preparation, characterization and evaluation of heterogeneous Fe(III)-SiO(2) catalysts for the photo-Fenton degradation of polyacrylamide (PAM) in aqueous solution. Fe(III)-SiO(2) catalysts are prepared by impregnation method with two iron salts as precursors, namely Fe(NO(3))(3) and FeSO(4), and are characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) methods. The irradiated Fe(III)-SiO(2) is complexed with 1,10-phenanthroline, then is measured by UV-vis-diffuse reflectance spectroscopy (UV-vis-DRS) and XPS to confirm the oxidation state of Fe in solid state. By investigating the photo-Fenton degradation of PAM in aqueous solution, the results indicate that Fe(III)-SiO(2) catalysts exhibit an excellent photocatalytic activity in the degradation of PAM. Moreover, the precursor species and the OH(-)/Fe mole ratio affect the photocatalytic activity of Fe(III)-SiO(2) catalysts to a certain extent. Finally, the amount of Fe ions leaching from the Fe(III)-SiO(2) catalysts is much low.
authors.affiliation: Department of Environmental Science and Engineering, Harbin Institute of Technology, P.O. Box 2606, 202 Haihe Road, Harbin 150090, PR China.
authors.forename: Ting
authors.initials: T
authors.lastname: Liu
authors.forename: Hong
authors.initials: H
authors.lastname: You
authors.forename: Qiwei
authors.initials: Q
authors.lastname: Chen
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D002384:Catalysis; D005290:Ferric Compounds / Q000737:chemistry*; D006868:Hydrolysis; D010777:Photochemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D014867:Water; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D005290:Ferric Compounds; D012822:Silicon Dioxide; D012996:Solutions; D014867:Water; D000099166:Polyacrylamides