FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (21): 34-38.doi: 10.7506/spkx1002-6630-201021007

• Basic Research • Previous Articles     Next Articles

Photocatalytic Degradation of Propranolol with MWCNTs-TiO2 Composite

CHEN Hai-bo1，DAI Ke2，CHEN Hao1,*   

  1. (1. College of Science, Huazhong Agricultural University, Wuhan 430070 China；
    2. College of Resource and Environment, Huazhong Agricultural University, Wuhan 430070, China)
  • Received:2010-06-28 Revised:2010-10-15 Online:2010-11-15 Published:2010-12-29
  • Contact: CHEN Hao1 E-mail:hchenhao@mail.hzau.edu.cn

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Abstract:

Residual propranolol in the aquatic environment would cause harm to aquatic products safety, and even threaten human health through the food chain, so it is necessary to take effective measures to remove propranolol. The photocatalytic degradation of propranolol in aqueous heterogeneous solution containing nanosized multi-walled carbon nanotubes (MWCNTs)-TiO2 composite as a photocatalyst was investigated under ultraviolet (UV) illumination, and the optimal experimental conditions for the photocatalytic degradation of propranolol such as propranolol concentration, initial pH, catalyst dose, light illumination time and mixing ratio for MWCNTs and TiO2 were determined. After 180-min UV illumination under optimized experimental conditions, the degradation rate of propranolol was as high as 95%. Meanwhile, a preliminary exploration on the degradation mechanism of propranolol was carried out, and the results showed that the degradation of propranolol was mainly attributed to the oxidation of hydroxyl free radicals.

Key words: MWCNTs-TiO2, photocatalyst, propranolol, mechanism

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