Abstract
Coloured wastewater is a major issue of today for human health and ecology. Among all available processes such as physical, chemical, biological and electrochemical methods, photocatalysis can be a promising solution because of its ability to degrade colour-causing compounds completely by converting them into simpler molecules (H2O, CO2) depending on dye structure. In this work, NiFe2O4was synthesized by the co-precipitation method. Furthermore, the composites of NiFe2O4 with TiO2 were synthesized by varying amounts of TiO2. The spinel and composites were characterized by XRD, ZETA analysis and UV-DRS. Their photocatalytic activities were investigated using the photocatalyticdegradation ofreactive turquoise blue 21 (RB 21)dye as model pollutants under sunlight.The increased absorption of the visible light and the enhanced separation of the electron-hole pairs due to the relative energy band positions in NiFe2O4 and TiO2 are considered as the main advantages.Our results showed that NiFe2O4-based nanocomposites could be used as an effective and magnetic retrievable photocatalyst.
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