Bi 2O 2CO 3/BiOI photocatalysts with heterojunctions highly efficient for visible-light treatment of dye-containing wastewater

Lang Chen, Shuang Feng Yin*, Sheng Lian Luo, Rui Huang, Qiang Zhang, Tao Hong, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

208 Citations (Scopus)

Abstract

Bi 2O 2CO 3/BiOI composites were fabricated at room temperature for the first time by a facile method. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra (UV-vis DRS), and nitrogen adsorption-desorption techniques were employed to characterize the physiochemical properties of the composites. The photocatalytic activities of Bi 2O 2CO 3, BiOI, and Bi 2O 2CO 3/BiOI were evaluated through the photocleaning of wastewater which contained rhodamine-B, methylene blue, crystal violet, or a mixture of them under visible-light irradiation (λ ≥ 420 nm). The photocatalytic activity of Bi 2O 2CO 3/BiOI is much higher than that of its components. Moreover, the composite shows good photostability and recyclability. The excellent catalytic efficiency of the Bi 2O 2CO 3/BiOI composite is deduced closely related to Bi 2O 2CO 3/BiOI heterojunctions whose presence is generally regarded to be a favorable factor for the separation of photogenerated electrons and holes. Moreover, ·OH was found to be the main active species for the photocatalytic interactions. The catalyst shows potential application in the treatment of dye-containing wastewater.

Original languageEnglish
Pages (from-to)6760-6768
Number of pages9
JournalIndustrial & Engineering Chemistry Research
Volume51
Issue number19
DOIs
Publication statusPublished - 16 May 2012

Scopus Subject Areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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