Research has been carried out on the synthesis of CoFe2O4/SiO2/Ag for adsorption of methylene blue dye and antibacterial test. The results of the synthesis were characterized using XRD, SEM-EDS and VSM. The results of XRD characterization showed the highest intensity was located at 2θ = 35.82o with a crystal size of 7.34 nm. The results of SEM-EDS characterization showed heterogeneous morpholo…