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 language | English |
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Pages (from-to) | 236-241 |
Number of pages | 6 |
Journal | Materials Chemistry and Physics |
Volume | 125 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 1 Jan 2011 |
Scopus Subject Areas
- General Materials Science
- Condensed Matter Physics
User-Defined Keywords
- Bismuth oxide
- Magnesium oxide
- Photocatalyst
- Visible light photodegradation