Nanoparticle/Microsphere TiO2/Bi2WO6Z-scheme Heterojunction with Excellent Visible-light Photocatalytic Performance

作者：Zhao, Mengxue; Liu, Yulin; Liao, Guosheng; He, Jinyun^*; Qin, Ningbo

来源：JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION, 2022, 37(6): 1114-1122.

DOI：10.1007/s11595-022-2641-9

• TiO2
• Bi2WO6
• Z-scheme
• visible-light photocatalytic performance
• hydrothermal method

Flower-like BiOBr/Bi2WO6 Z-scheme heterojunction was prepared by a two-step solvothermal method. BiOBr microspheres were firstly synthesized through solvothermal method. Then the out part of the BiOBr microspheres was designed to react with Na2WO4 forming Bi2WO6 nanosheets through ion exchange process. The BiOBr/Bi2WO6 heterojunction has a larger BET surface area, smaller energy band gap, faster transfer of charge carriers and a much better visible-light photocatalytic performance than that of BiOBr and Bi2WO6. It also has a better cycling stability than that of the BiOBr. Possible photocatalytic mechanism of the BiOBr/Bi2WO6 heterojunction is proposed.

• 单位
  桂林理工大学