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Preparation, characterization and photocatalytic activity of visible light driven chlorine-doped TiO2 |
| LONG Mingce, CAI Weimin, CHEN Heng, XU Jun |
| School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China; |
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Abstract A novel chlorine-doped titanium dioxide catalyst with visible light response was prepared by hydrolysis of tetrabutyl titanate in hydrochloric acid. The catalyst samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS). Results showed that the doped element of Cl lowered the temperatures of phase transformation of TiO2 from amorphous to anatase and from anatase to rutile. The absorption edge of chlorine-doped TiO2 calcined at 300vH shifted to visible light region. X-ray photoelectron spectroscopy results proved that chlorine existed in the TiO2 crystal lattice as anion. The photocatalytic degradation of phenol showed that under visible light (λ>400 nm) irradiation, the chlorine-doped TiO2 calcined at 300vH displayed the best performance, the degradation ratio of phenol was 42.5% after 120 min.
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Issue Date: 05 September 2007
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