Construction of novel Cu2O/PbBiO2Br composites with enhanced photocatalytic activity

  • Yongmei Xia
  • Zuming HeEmail author
  • Jiangbin SuEmail author
  • Kejun Hu


In this work, novel Cu2O/PbBiO2Br heterojunction composites have been successfully prepared by hydrothermal method and oxidation–reduction process. The structure, morphology, optical and electronic properties of the as-prepared photocatalysts were investigated by various techniques. It is demonstrated that PbBiO2Br appears a smooth brick-like nanostructure and the average size is about 20–110 nm. The PbBiO2Br nano-bricks are dispersed on the surface of Cu2O particles to form Cu2O/PbBiO2Br p-n heterostructures. Compared with pure PbBiO2Br and Cu2O, the Cu2O/PbBiO2Br heterojunction composites exhibit enhanced photocatalytic performances for the degradation of crystal violet (CV) solution under visible-light irradiation. In particular, the 5%Cu2O/PbBiO2Br composite shows the optimal photocatalytic performance, and the degradation efficiency of CV reaches 96% in 50 min. The enhanced photocatalytic performance of the Cu2O/PbBiO2Br composites can be attributed to the significantly enhanced absorption in the visible range and efficient separation of photo-generated electron–hole pairs due to the formation of Cu2O/PbBiO2Br p-n heterostructures. Furthermore, the radical trapping experiments indicate that \(\cdot {\text{O}}_{2}^{ - }\) radicals and holes are the main active species during the decomposition process. Based on the experimental results and analyses, a possible photocatalytic mechanism of the Cu2O/PbBiO2Br composites is proposed. This study reveals that the Cu2O/PbBiO2Br composite photocatalysts could be applied in the wastewater purification.



This work was supported by the Natural Science Foundation of Jiangsu Province (BK20181043) and the Specialized Research Fund for the Doctoral Program of Jiangsu University of Technology (KYY17011).

Compliance with ethical standards

Competing interests

The authors declare that they have no competing interests.


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Authors and Affiliations

  1. 1.School of Materials and EngineeringJiangsu University of TechnologyChangzhouChina
  2. 2.Huaide SchoolChangzhou UniversityJingjiangChina
  3. 3.School of Mathematics & PhysicsChangzhou UniversityChangzhouChina

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