title: Photo-assisted hetero-fenton decolorization of azo dye from contaminated water by Fe-Si mixed oxide nanocomposite.
abstract: An aerogel of silica gel dopeyd with 2.86 wt% Fe was prepared by an alkoxide sol-gel method and using tetraethyl orthosilicate as a precursor material. The synthesized aerogel was calcined at 500 degress C to produce nanoparticle solids, and was characterized by XRD, FT-IR and SEM. The nanosized iron-silica gel mixed oxide was tested in the photooxidation of the azo dye Acid Red 14 (AR 14) using 30% aqueous hydrogen peroxide as oxidant and UV light. The 2.86 wt% Fe-loaded SiO2 showed very good efficiency in the decolorization of AR 14. The effects of various parameters including solution pH, catalyst, oxidant and initial dye concentrations on photodegradation were investigated and the optimum conditions were determined. The catalyst was resistant to leaching and could be recycled several times without appreciable loss of activity.
authors.affiliation: Department of Chemistry, Faculty of Science, Zanjan University, Zanjan, Iran. m_h_rasoulifard@yahoo.com
authors.forename: M H
authors.initials: MH
authors.lastname: Rasoulifard
authors.forename: H Hosseini
authors.initials: HH
authors.lastname: Monfared
authors.forename: S
authors.initials: S
authors.lastname: Masoudian
mesh_terms: D001391:Azo Compounds / Q000737:chemistry* / Q000302:isolation & purification / Q000528:radiation effects; D003116:Color; D004396:Coloring Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000528:radiation effects; D045424:Complex Mixtures / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008027:Light; D049329:Nanostructures / Q000737:chemistry / Q000528:radiation effects; D010087:Oxides / Q000737:chemistry / Q000528:radiation effects; D010777:Photochemistry / Q000379:methods; D012825:Silicon / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D045424:Complex Mixtures; C045076:Fenton's reagent; D010087:Oxides; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron; D012825:Silicon