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《Transactions of The Chinese Society of Agricultural Engineering》 2005-05
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Application of gas-solid heterogeneous photocatalytic reaction of nanoparticle TiO_2 to ethylene degradation

Ye Shengying1, He Mingshu1, Cen Chaoping2, Song Xianliang1(1.College of Food Science, South China Agricultural University, Guangzhou 510642, China;2.South China Institute of Environmental Science, State Evironmental Protection Agency, Guangzhou 510655, China)  
A gas-solid heterogeneous photocatalytic reaction of TiO 2 was investigated for ethylene degradation during storage of fruit and vegetable. Photocatalysis of ethylene degradation by nanoparticle TiO 2 which was prepared by sol-gel processing was conducted in gas-solid phase photocatalytic experiment system. The effects of ethylene concentration and illumination time of UV light on degradation reaction, the kinetics of photocatalysis of ethylene degradation were also studied. The results showed that: the content of anatase phase of the TiO 2 catalyst was 48.766%, and its specific surface area was 47.186 m2/g, the TiO 2 catalyst is of good photocatalytic activity; under 10 min illumination of UV light, the degradation rate of ethylene in TiO 2 photocatalytic treatment was increased by about 23.76%, compared with that of the UV light without TiO 2 treatment; the degradation rate of ethylene decreased with the increase of ethylene concentrations; the kinetics of gas-solid heterogeneous photocatalytic reaction of nanoparticle TiO 2 for ethylene degradation can be described using the Langmuir-Hinshelwood kinetic equation.
【Fund】: 广东省科技计划项目(B202)
【CateGory Index】: TS205
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