Research on the synthesis of NiFe2O4/SiO2/NiO and its application on photocatalytic degradation of congo red dye has been done. The NiFe2O4 compound was synthesized through coprecipitation method, NiFe2O4/SiO2 composite was synthesized through the sol gel method, and NiFe2O4/SiO2/NiO composite was synthesized by hydrothermal method. The results of the synthesis of NiFe2O4/SiO2/NiO composite wer…