Photocatalytic Degradation of Phenol by Impure BiFeO₃ under Visible Light Irradiation

Abstract:

Impure BiFeO₃ as a visible light photocatalyst for phenol degradation was synthezied via solid state method. The calcined temperatures of catalysts were studied. The characteristics of the catalysts were determined by XRD, SEM/EDS and BET. The catalysts were mainly composed of rhombohedral distorted perovskite-type BiFeO₃ phase with impurity phases (B₂Fe₄O₉, Bi₂₅FeO₄₀ and Bi₂O₃). Photocatalytic activity of phenol (5 mg/l) was studied in the impure BiFeO₃ illuminated with 200 w fluorescence lamps. The catalyst amount and initial pH value of phenol solution on the photocatalytic effiency have been also investigated. In the present experiments, the catalyst calcined at 800°C shows the highest activity. The optimum loading of impure BiFeO₃ and pH value were obtained to be 0.5 g/l and 6, respectively.

• Periodical: Key Engineering Materials (Volume 659)
• Pages: 274-278
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.659.274
• Online since: August 2015
• Authors: Katnanipa Wanchai*
• Keywords: Degradation, Impure BiFeO₃, Phenol, Photocatalytic, Visible Light

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