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Citation: Su Wen-Yue, Fu Xian-Zhi, Wei Ke-Mei. Effect of Sulfation on Structure and Photocatalytic Performance of TiO₂[J]. Acta Physico-Chimica Sinica, ;2001, 17(01): 28-31. doi: 10.3866/PKU.WHXB20010106 shu

Effect of Sulfation on Structure and Photocatalytic Performance of TiO₂

1.
Research Institute of Photocatalysis,Fuzhou University,Fuzhou　350002

Received Date: 4 April 2000
Available Online: 15 January 2001

TiO2 and /TiO2 photocatalysts were prepared by solgel method and characterized by Xray diffraction (XRD),BET N2 sorption analysis, IR spectroscopy and UVVis Diffuse Reflectance Spectroscopy (DRS).Photocatalytic degradation of CH3Br in air stream was studied over TiO2 and /TiO2 catalysts under various reaction conditions.The results indicated that the structural and photocatalytic properties of TiO2 were greatly improved by sulfation.The sulfated TiO2 (/TiO2) showed excellent reaction activity and stability for CH3Br photocatalytic decomposition even under the moist reaction conditions.It was found that both B acid sites and L acid sites exist on the /TiO2 catalyst,forming cooperative centers with superacidic characteristics.When compared to unmodified TiO2,the /TiO2 catalyst exhibited higher anatase content,smaller crystal size,higher specific surface area,centralized pore size distribution,and the blueshifted band edge of Uvvis adsorption spectra.
- Titania;Sulfation;Photocatalysis;Bromomethane
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沈阳化工大学材料科学与工程学院沈阳 110142

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Effect of Sulfation on Structure and Photocatalytic Performance of TiO2

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Effect of Sulfation on Structure and Photocatalytic Performance of TiO₂