Study on combustion solution prepared Co0.25Ni0.25Cu0.25Mn0.25Fe2O4 and their photocatalytic performance
Using cobalt nitrate(Co(NO3)2·6H2O),iron nitrate(Fe(NO3)3·9H2O),nickel nitrate(Ni(NO3)2·6H2O),manganese nitrate(Mn(NO3)2·4H2O),copper nitrate(Cu(NO3)2·3H2O)as raw materi-als and glycine as fuel,Co0.25Ni0.25Cu0.25Mn0.25Fe2O4 was prepared by solution combustion synthesis.The preparation and catalytic performance of Co0.25Ni0.25Cu0.25Mn0.25Fe2O4 powder with different mount of glycine were investigated.The organic solvent methylene blue was used as the pollution source to test its photocatalytic performance.The powder samples were detected by XRD,and the optimum amount of glycine was found.The results showed that when the molar ratio of glycine to iron nitrate was 4,of methylene blue achieved the best photocatalytic performance.The time for complete degradation of 0.002%,0.004%,and 0.006%methylene blue was 40 minutes,60 minutes,and 70 minutes,respectively.The kinetic analysis was also carried out.Glucose as the additives can effectively improve Co0.25Ni0.25 Cu0.25Mn0.25Fe2O4 powder in the catalytic activity.When the adding glucose amount is 1 g,the required time for fully biodegradable initial concentration of 0.004%MB is 50 minutes,and degradation effi-ciency increased by 16.7%.
high entropy oxidessolution combustionphotocatalysisdegradation rate