Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (01): 92-97.doi: 10.3866/PKU.WHXB20060118

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Effect of Magnetic Field on the Photocatalytic Oxidation of Benzene and Ethylene over Pt/TiO2

YANG Jun-wei; WANG Xu-xu; DAI Wen-xin; LI Dan-zhen; FU Xian-zhi   

  1. Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, P. R. China
  • Received:2005-06-13 Revised:2005-06-21 Published:2006-01-15
  • Contact: FU Xian-zhi

Abstract: The effect of magnetic field on the photocatalytic oxidation of benzene and ethylene contained in air over Pt/TiO2 was studied under 365 nm irradiation in the range of magnetic field intensity of ≤0.2 T. It was found that when the UV lamp was near to or under a magnetic field, the magnetic field could enhance the photocatalytic conversion and mineralization of benzene and ethylene. However, no effect of magnetic field on the reactions was observed when the UV lamp was far away from the magnetic field and the light was transmitted onto the reactor by a focusing fiber. In the former case, the observed enhance of photocatalytic oxidation of the two reactants was a result of the increase of brightness of the UV lamp under magnetic field. This is because that high photo intensity provided high light energy for the reaction and led to increase of the reaction temperature. In the latter case, intensity of UV light wasn′t disturbed by the magnetic field, applying magnetic field had no effect on the two photocatalytic reactions. The results showed that there was no any inherent effect on the gas-solid phase photocatalytic reaction.

Key words: Photocatalysis, Magnetic field effect, Benzene, Ethylene