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Citation: XU Xin, WANG Xiao-Jing, HU Zhong-Hua, LIU Ya-Fei, WANG Chen-Chen, ZHAO Guo-Hua. Influence of Sol-Gel and Dip-Hydrothermal Preparation Methods on Structure and Performance of TiO₂/AC Photocatalysts[J]. Acta Physico-Chimica Sinica, ;2010, 26(01): 79-86. doi: 10.3866/PKU.WHXB20100131 shu

Influence of Sol-Gel and Dip-Hydrothermal Preparation Methods on Structure and Performance of TiO₂/AC Photocatalysts

1.
Department of Chemistry, Tongji University, Shanghai 200092, P. R. China; School of Sciences, Hebei University of Science and Technology, Shijiazhuang 500018, P. R. China

Received Date: 27 July 2009
Available Online: 2 December 2009

TiO2 catalysts deposited on activated carbon (TiO2/AC) were prepared by sol-gel and dip-hydrothermal methods to investigate the effect of preparation methods on the structure and catalytic performance of TiO2/AC catalysts. The samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, and nitrogen adsorption. Results show that the TiO2 produced by the sol-gel method consists of irregular fragments coated onto the carbon surface and that the dip-hydrothermal method leads to nanorods being deposited onto the AC surface. The mesoporous and microporous specific surface areas of the TiO2/AC samples prepared by the dip-hydrothermal method were larger than those of the sol-gel samples, and the diameters of the TiO2 particles prepared by the former method were smaller. The performance of the TiO2/AC composite photocatalysts was evaluated by the degradation of methyl orange (MO). We found that 600 ℃ was the optimal temperature for the calcination of TiO2. Furthermore, the photocatalytic activities of TiO2/AC samples prepared by the dip-hydrothermal method were obviously better than those prepared by the sol-gel method.
- TiO2,
- Photocatalysis,
- Activated carbon support,
- Sol-gel method,
- Dip-hydrothermal method
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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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Influence of Sol-Gel and Dip-Hydrothermal Preparation Methods on Structure and Performance of TiO2/AC Photocatalysts

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通讯作者: 陈斌, bchen63@163.com

Influence of Sol-Gel and Dip-Hydrothermal Preparation Methods on Structure and Performance of TiO₂/AC Photocatalysts