The Effect of Sintering Temperature on the Photocatalytic Activity of Nickel Ferrite on Methylene Blue

Nickel ferrite is synthesized by sol–gel autocombustion method with ethylene glycol as fuel. The thermal stability of the sample is studied using thermogravimetric analysis. The prepared ferrite sample is sintered at 500, 600 and 700 °C. The structure of the ferrite powder hence obtained is characterized by XRD and TEM. The grain size is found to increase with sintering temperature as expected. The photocatalytic degradation of methylene blue is studied using all the samples under sunlight and the degradation was studied using UV–Visible spectrophotometry.