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Citation: WEN Chen, ZHAO Ying, ZHANG Rui, JIAO Jun. Effect of La-Doping on the Photocatalytic Activity of Active Carbon Supported TiO₂ Catalysts[J]. Chinese Journal of Applied Chemistry, ;2006, 23(7): 734-738. shu

Effect of La-Doping on the Photocatalytic Activity of Active Carbon Supported TiO₂ Catalysts

1.
Institute of Material & Chemical Engineering, Tianjin Polytechnic University, Tianjin 300160

Corresponding author: WEN Chen,
Received Date: 5 August 2005
Available Online: 6 October 2005
Fund Project: 教育部科学技术研究重点项目(02009) (02009)

The pure and La-doped TiO₂/AC catalysts were prepared on the surface of active carbon(AC) via the sol-gel method with tetrabutylorthotitanat and lanthanum nitrate as source materials.The crystalline structures and morphologies were characterized by means of XRD,UV-Vis and SEM.The effects of calcining temperature and La content on the properties and the photocatalytic activity of TiO₂/AC catalysts for the degradation of methylene blue have been carefully investigated.The results show that La dopant not only greatly inhibits TiO₂ crystal phase transformation from anatase to rutile,but also makes the optic response range of TiO₂ particle expand to visible light.It was found that the degradation rate of methylene blue reached 87% when the molar fraction of La in TiO₂ was 0.30% and the irradiation time was 120 min.
- La-doping,
- activate carbon supported TiO₂ catalyst,
- phase transformation,
- photocatalytic activity,
- methylene blue
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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 La-Doping on the Photocatalytic Activity of Active Carbon Supported TiO₂ Catalysts