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Carboxymethyl cellulose (CMC)/bismuth ferrite (BiFeO3) nanocomposites with optical excitation of 490 nm were successfully prepared by impregnation method and were characterised by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM) and UV-Vis technique. The photocatalytic efficiency of the composite was further evaluated by degradation of methyl orange (MO) at wavelength 464 nm under direct sunlight irradiation. The incorporation of 0.8 w/w% BiFeO3 catalyst within the CMC film had shown a remarkable removal efficiency of 10 ppm MO by 91.62% as compared to pristine BiFeO3 with only 0.7% removal. There exists efficient synergistic effect of photodegradation and adsorption of MO onto CMC-BiFeO3. Kinetics studies revealed that the MO removal dominantly governed by adsorption that obeys pseudo-second order kinetic model. The photocatalytic activity has high effect in acidic condition. The recycling ability of unwashed nanocomposite confirming that the photocatalyst was essentially stable.

Remarkable Catalytic Activity of CMC/BiFeO3 Nanocomposite Film for the Degradation of Methyl Orange Under Direct Sunlight Radiation