title: Preparation and characterization of magnetically separable photocatalyst (TiO2/SiO2/Fe3O4): effect of carbon coating and calcination temperature.
abstract: TiO2/SiO2/Fe3O4 composite was synthesized by sol-gel technique for silica and titania coatings on magnetite core to enable recovery after photocatalytic degradation. Carbon coating was also carried out by calcination of TiO2/SiO2/Fe3O4 under nitrogen atmosphere in presence of PVA as a source of carbon to enhance the adsorption of organic compounds on catalyst surface and to get better activity. All prepared samples were characterized using EDX, CN analyzer, XRD, BET and SEM. Degradation of methyl orange dye was used to assess the photocatalytic performance of the prepared samples. Calcination temperature was found to affect rate of reaction because of the formation of rutile phase at high calcination temperature. Carbon coated samples unexpectedly exhibited lower rate of reaction at almost all calcination temperatures.
authors: Department of Materials and Life Science, Seikei University, 3-3-1 Kichijoji Kita-machi, Musashino-shi, Tokyo180-8633, Japan. tareqabdelshafy@yahoo.ca
authors: Tarek A
authors: TA
authors: Gad-Allah
authors: Kyoko
authors: K
authors: Fujimura
authors: Shigeru
authors: S
authors: Kato
authors: Shigeo
authors: S
authors: Satokawa
authors: Toshinori
authors: T
authors: Kojima
mesh_terms: D001391:Azo Compounds / Q000737:chemistry / Q000528:radiation effects; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry / Q000528:radiation effects; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D008280:Magnetics; D010777:Photochemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; C100258:methyl orange; D002244:Carbon; D012822:Silicon Dioxide; D014025:Titanium; D052203:Ferrosoferric Oxide