Effect of pH on Phase, Morphology and Photocatalytic Properties of BiOBr Synthesized by Hydrothermal Method

  • Prakasit Intaphong
  • Anukorn PhuruangratEmail author
  • K. Karthik
  • Phattranit Dumrongrojthanath
  • Titipun Thongtem
  • Somchai ThongtemEmail author


Effect of pH on crystalline structure, morphology and visible-light-driven photocatalysis of BiOBr samples hydrothermally synthesized in solutions with the pH of 2–10 was investigated. The as-synthesized BiOBr samples investigated by X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. In this research, the as-synthesized samples are pure tetragonal BiOBr phase at the pH of 2–10, and were composed of microplates, nanoplates and hierarchical micro-flowers controlled by the solution pH. The as-synthesized sample at the pH 8 was revealed the presence of Bi 4f, O 1s and Br 3d. Visible-light-driven photocatalytic properties of the BiOBr photocatalyst with different morphologies were investigated through the photodegradation of rhodamine B (RhB). The BiOBr hierarchical micro-flowers synthesized in the solution with the pH 8 show the best photocatalytic activity for wastewater treatment and the ·O2 radicals were attributed to be the primary active species for photodegradation of RhB under visible light irradiation.


BiOBr hierarchical micro-flowers Photocatalysis Spectroscopy 



We are extremely grateful to the Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand for providing financial support through the Contact No. SCI620121S.


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Authors and Affiliations

  1. 1.Department of Materials Science and Technology, Faculty of SciencePrince of Songkla UniversitySongkhlaThailand
  2. 2.Department of PhysicsBharathidasan UniversityTiruchirappalliIndia
  3. 3.Rajamangala University of Technology Lanna Chiang RaiChiang RaiThailand
  4. 4.Materials Science Research Center, Faculty of ScienceChiang Mai UniversityChiang MaiThailand
  5. 5.Department of Chemistry, Faculty of ScienceChiang Mai UniversityChiang MaiThailand
  6. 6.Department of Physics and Materials Science, Faculty of ScienceChiang Mai UniversityChiang MaiThailand

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