Photodegradation of Rhodamine B over unexcited semiconductor compounds of BiOCl and BiOBr

Xiaofeng Chang, M. A. Gondal, A. A. Al-Saadi, M. A. Ali, Hefei Shen, Qin Zhou, Jun Zhang, Mengping Du, Yousong Liu, Guangbin Ji

Research output: Contribution to journalArticlepeer-review

179 Citations (Scopus)


This study reported, for the first time systematically, photodegradation of Rhodamine B (RhB) in aqueous solution over BiOCl and BiOBr semiconductors. Under visible light irradiation (λ> 400. nm, λ> 420. nm and λ= 550 ± 15. nm), RhB adsorbed on the surface of BiOCl and BiOBr was photosensitized and decomposed effectively over unexcited BiOCl and BiOBr. The degradation of Methyl Orange (MO) and Methylene Blue (MB) over BiOCl and BiOBr was investigated as well, and the results were compared with RhB photodegradation. It was found that MB molecules having the lowest LUMO could not be degraded by this process. Utilizing the quantum chemical calculation (Gaussian 03 program), the relationship between frontier orbital energy of selected dye molecules and photodegradation rate was established for the first time in this study.

Original languageEnglish
Pages (from-to)291-298
Number of pages8
JournalJournal of Colloid And Interface Science
Issue number1
Publication statusPublished - 2012 Jul 1
Externally publishedYes


  • BiOBr
  • BiOCl
  • Methyl Orange
  • Methylene Blue
  • Photosensitized degradation
  • Rhodamine B

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry


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