facile synthesis of nickel chromite nanostructures by hydrothermal route for photocatalytic degradation of acid black 1 under visible light

nicr2o4 normal spinel nanostructures were prepared via hydrothermal treatment at 180 °c for 12 h in the presence of cetyltrimethylammonium bromide (ctab), sodium dodecyl sulphate (sds) and poly vinylpyrrolidone-25000 (pvp-25000) as capping agents and subsequent calcination process at 500 °c for 3 h . in this method, [ni(en)2(h2o)2](no3)2 and [cr(en)3]cl3.3h2o used as precursors and not utilized any alkaline or precipitating agent. detailed characterization of  the as-prepared nanostructures were carried out by fourier transform infrared (ftir), x-ray diffraction (xrd), field emission scanning electron microscopy (fesem), uv-vis diffuse reflectance spectroscopy (drs). xrd revealed the formation of pure nickel chromite spinel phase and sem showed the formation of uniform sphere-like nanoparticles. furthermore, the photocatalytic degradation of acid black 1 as diazo dye used in textile and dyeing water pollutants was investigated.