Photocatalytic degradation of methylene blue in water using CoFe2O4–Cr2O3–SiO2 fluorescent magnetic nanocomposite

A CoFe2O4–Cr2O3–SiO2 fluorescent magnetic nanocomposite (FMNC) has been synthesized by a combined sonochemical co-precipitation method. Remarkable feature of the FMNC is its high band gap energy (3–4 eV). Photocatalytic activity of the FMNC has been examined for degradation of methylene blue in aqueous solution under UV irradiation (12 mW Hg lamp, major wavelength 400 nm). The catalyst could be separated from aqueous media by applying external magnetic field and hence could be reused without any significant loss of its activity.

Figure optionsDownload high-quality image (164 K)Download as PowerPoint slideHighlights
► A CoFe2O4–Cr2O3–SiO2 fluorescent magnetic nanocomposite with high band gap energy.
► The nanocomposite acts as an efficient photocatalyst for degradation of methylene blue.
► Magnetic nanocomposite could be recovered using an external magnet and reused.