Preparation, characterization and photocatalytic activity of Bi 2O3-MgO composites

Er Jun Li, Kai Xia, Shuang Feng Yin*, Wei Li Dai, Sheng Lian Luo, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

A series of Bi2O3-MgO composites were synthesized by solvent-thermal method. It was found that the Bi2O3-MgO composites perform much better than TiO2 (P25), Bi2O 3 and MgO in the photocatalytic degradation of rhodamine B (RhB) in the presence of HCl and under irradiation of visible light (λ > 400 nm). The effects of Bi/Mg molar ratio, crystallization temperature of Bi 2O3-MgO and reaction conditions on photocatalytic activity were studied. The best performance was observed over the composite with Bi:Mg molar ratio equal to 2:1 that had been subject to crystallization at 120 °C for 20 h. In addition, the photocatalytic efficiency of the composite can be significantly enhanced by the presence of hydrochloric acid. The prepared samples were characterized by XRD and UV-vis DRS techniques. The relationships between the structure and photocatalytic performance of the as-prepared Bi 2O3-MgO samples were also investigated.

Original languageEnglish
Pages (from-to)236-241
Number of pages6
JournalMaterials Chemistry and Physics
Volume125
Issue number1-2
DOIs
Publication statusPublished - 1 Jan 2011

Scopus Subject Areas

  • Materials Science(all)
  • Condensed Matter Physics

User-Defined Keywords

  • Bismuth oxide
  • Magnesium oxide
  • Photocatalyst
  • Visible light photodegradation

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