Photocatalytic Degradation of 4-Chlorophenol by Gd-Doped β-Bi2O3 Under Visible Light Irradiation

  • Shijing LinEmail author
  • Wutong Du
  • Laga Tong
  • Tao Ji
  • Xinxin Jiao


Chlorophenols are known as persistent organic pollutants. Therefore, research on the removal of chlorophenols has attracted widespread attention. Herein, the photocatalytic degradation of 4-chlorophenol by Gd-doped β-Bi2O3 under visible light irradiation was studied. The results showed that Gd-doped β-Bi2O3 materials are efficient catalysts for the photocatalytic degradation of chlorophenols, and 2%(atomic fraction) Gd-doped β-Bi2O3 exhibits the highest photocatalytic activity for 4-chlorophenol degradation, because doping an appropriate amount of Gd3+ ions can effectively reduce the recombination rate of the photogenerated e/h+ pairs and then enhance the photocatalytic performance. When the reaction was carried out at 25 °C for 6 h using the 2% Gd-doped β-Bi2O3 micro/nano mate-rials of 200 mg and at air flow rate of 40 mL/min, the degradation rate of 4-chlorophenol reached 92.3%. Additionally, based on the analysis of the products, it was speculated that the dominant photocatalytic degradation mechanism of 4-chlorophenol by Gd-doped β-Bi2O3 under visible light irradiation is an oxidative process involving an attack by the hydroxyl radical.


Bi2O3 Doping Photocatalysis 4-Chlorophenol 


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Copyright information

© Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Shijing Lin
    • 1
    Email author
  • Wutong Du
    • 1
  • Laga Tong
    • 1
  • Tao Ji
    • 1
  • Xinxin Jiao
    • 1
  1. 1.College of Chemical EngineeringBeijing Institute of Petrochemical TechnologyBeijingP. R. China

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