Magnetic bimetallic nanospinels (MFe 2 O 4 ; M=Cu, Zn, Ni and Co) of size ranging between 15-30 nm were synthesized by facile and viable sol-gel method. The analysis of Fourier Transform Infrared Spectra of all the samples demonstrated formation of M-O bond in spinel structure. Structural exploration of all the nano materials using Powder X-Ray Diffraction and High Resolution Transmission Electron Microscopy revealed formation of single phase cubic spinel structure. All the materials exhibited magnetic temperament with high surface area (92-151 m 2 /g). Furthermore, band gap calculated from diffuse reflectance spectra was quite narrow (1.26-2.08eV) for all the samples, hence ferrites could act as visible light driven photocatalyst.The prepared nanospinels were proposed to be promising heterogeneous photo-Fenton catalyst under visible light for the degradation of organic pollutants. The catalytic results revealed that rate of reaction was significantly influenced by the cation in the spinel structure as degradation order was observed to be CuFe 2 O 4 (k=0.286 min -1 ) >ZnFe 2 O 4 (k=0.267 min -1 ) > NiFe 2 O 4 (k=0.138 min -1 ) > CoFe 2 O 4 (k=0.078 min -1 ). The reaction conditions were optimized for all the ferrites as the photodegradation was influenced by ferrite dosage (0.25-1.00 g/L), pH (2)(3)(4)(5) and H 2 O 2 concentration (4-27 mM). The experimental data disclosed that activity of ferrite was sensitive to sintering temperature. The materials displayed remarkable stability in the reaction as it could be magnetically separated using external magnet and recycled up to 4 consecutive cycles. There was no significant loss in activity of all the material demonstrating an excellent ability of ferrites to remove organic pollutants from wastewater.

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