Abstract
Fe₂O₃/TiO₂ nanocomposite were successfully synthesized by co-precipitation method using Fe (NO₃)₃·9H₂O and Ti (SO₄)₂ as raw materials. Structural and textural features of the mixed oxide samples were characterized by X-ray diffractometer, field emission scanning electron microscopy and energy-dispersive X-ray. The effects of initial concentration of oxytetracycline (OTC), different competitive ions and organics on the photocatalytic degradation rate of OTC by the Fe₂O₃/TiO₂ nanocomposite were analyzed under UV and visible light irradiation. The results indicate that the optimized initial concentration of OTC was 50 ㎎/L to achieve the best photocatalytic efficiency. Cu 2+ , NH₄⁺, C₃H₈O and EDTA in the aqueous suspension were found to suppress the degradation rate of OTC, whereas the effect of NO₃⁻ and H₂C₂O₄ can be ignored.
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