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Citation: SU Bitao, ZHU Pingwu, XU Jingjing, ZHAO Li. Photocatalytic Property of ZnTiO₃-TiO₂ Nano-composite Materials[J]. Chinese Journal of Applied Chemistry, ;2011, 28(1): 33-38. doi: 10.3724/SP.J.1095.2011.00204 shu

Photocatalytic Property of ZnTiO₃-TiO₂ Nano-composite Materials

1.
Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070

Corresponding author: SU Bitao,
Received Date: 9 April 2010
Available Online: 18 June 2010
Fund Project: 国家自然科学基金(20963008) (20963008)甘肃省自然科学基金(0710RJZA119) (0710RJZA119)甘肃省教育厅研究生导师基金(0901-02)资助项目 (0901-02)

ZnTiO₃-TiO₂ nano-composite photocatalytic materials were prepared via a Sol-Gel method and characterized by transmission electron microscope(TEM), X-ray diffractometry(XRD), UV-Vis spectrum and zeta(ζ) potential. The influences of light source and calcination temperature on the photocatalytic property of the nano-composite materials was investigated by decolorizing degradation of methylene blue(MB) solution as a probe. The results exhibit that the catalytic activity of the as-prepared material depends on the particle size, dispersibility in solution as well as the superficial charge. On the surface of the ZnTiO₃-TiO₂ obtained by calcinin at 600℃ for 3 h, which can disperse well in solution and has an average particle size of 60 nm and highest negative charge, decolorizing efficiency of MB solution was up to 93% under sunlight radiation for 7 h while the efficiency was just 82% under ultraviolet light radiation for same time radiation. Such efficiency can be maintained higher than 80% when the catalyst is repeatedly used for 4 times. The nano-composite material shows higher photocatalytic activity than pure TiO₂ and ZnO, and has preferable photocatalytic stabilization property under sunlight.
- ZnTiO₃-TiO₂ nano-composite materals,
- sol-gel method,
- photocatalytic property
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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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Photocatalytic Property of ZnTiO₃-TiO₂ Nano-composite Materials