Preparation of Magnetic Ni_(0.5)Co_(0.5)Fe_2O_4 Nanoparticles and their Applications In Adsorption of Bovine Serum Albuminn

摘要

Ni_(0.5)Co_(0.5)Fe_2O_4 (NCFO) nanoparticles were prepared by the chemical co-precipitation process using metal chloride, nitrate and acetate as precursor, after the precursors were annealed and then investigated in detail by employing X-ray diffraction (XRD), magnetic measurement and the bovine serum albumin (BSA) adsorption on the nanoparticles was analyzed by UV spectrophotometer at room temperature. XRD analysis indicates that all the as-prepared nanocrystals posses a pure cubic spinel structure. The saturation magnetization initially increases and then decreases with increasing annealing temperature, with a maximum value 67.19 emu/g at 950 ° C. The coercivity also firstly increases and then decreases with increasing annealing temperature, with a maximum value of 828 Oe at 650°C. The as-prepared Ni_(0.5)Co_(0.5)Fe_2O_4 nanoparticles exhibit a good adsorbing ability for BSA and the optimized adsorption is achievedfor the Ni_(0.5)Co_(0.5)Fe_2O_4 nanoparticles annealed at 750° C with grain size about 33.3 nm.