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YAN ZHAO1,* , XIAOXIA ZHANG1, XIAOGUANG ZHAO1, LIJUAN GENG1
V TiO 2 fly ash cenospheres were successfully synthesized by sol-gel method. The V TiO 2 fly ash catalyst was found to be mainly preserved its anatase phase after calcination at 500◦C. The XRD pattern shows the characteristic peaks of TiO2 anatase phase and the diffraction peaks of SiO2, Fe2O3 and Al2O3 disappeared or weakened. Further, there are no obvious peaks of vanadium oxides (V2O5 and V2O4). From SEM images, there are some 200-300 μm-sized spheric particles covered by V-TiO2 film. The V-TiO2 layer is nonuniform and the discontinuous deposits are inhomogeneous with islands being observed on the surface. The XPS analysis indicates that V4+and V5+ either substitute Ti4+ site or embed in the TiO2 structure. In addition, the UV-Vis spectra reveals the shift of the optical absorption towards the red light zone and this shift depends on the vanadium content in the compound catalyst. The photocatalytic activity was evaluated by the degradation of direct fast scarlet 4BS under UV light irradiation. The degradation rate of V TiO 2 fly ash was higher than that of TiO 2 fly ash, which reached up to 98.7% after UV irradiation for 90min. Therefore, the prepared V TiO 2 fly ash possesses better photocatalytic properties..
VTiO 2 , Fly ash cenospheres, Direct fast scarlet 4BS, Photocatalysis.
YAN ZHAO, XIAOXIA ZHANG, XIAOGUANG ZHAO, LIJUAN GENG, Preparation and characterization of V-TiO2 /fly-ash cenospheres and its photocatalytic properties, Optoelectronics and Advanced Materials - Rapid Communications, 7, 1-2, January-February 2013, pp.129-132 (2013).
Submitted at: Aug. 10, 2012
Accepted at: Feb. 20, 2013
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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