Fabrication Characterization and Activity of a Solar Light Driven Photocatalyst: Cerium Doped TiO2 Magnetic Nanofibers
A novel magnetic separable composite photocatalytic nanofiber consisting of TiO2 as the major phase, CeO2–y and CoFe2O4 as the dopant phase was prepared by sol–gel method and elec-trospinning technique, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectrum (UV-vis DRS) and vibrating sample magnetometer (VSM). The photocatalytic activity of the resultant CoFe2O4-TiO2 and CeO2–y /CoFe2O4-TiO2 nanofibers was evaluated by photodegradation of methylene blue (MB) in an aqueous solution under xenon lamp (the irradiation spectrum energy distribution is similar to sunlight) irradiation in a photochemical reactor. The results showed that the dopant of Ce could affect the absorbance ability and photo-response range. The sample containing 1.0 wt% CeO2–y exhibited the highest degradation with 35% for MB under simulate solar light irradiation. Furthermore, the as-synthesized composite photocatalytic nanofibers could be separated easily by an external magnetic field, thus it might hold potential for application in wastewater treatment.
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Document Type: Research Article
Publication date: March 1, 2012
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