He Aolin, Li Shasha, He Dawei, Liu Yuanyuan
Affiliated Kunshan Hospital, Jiangsu University, Kunshan 215300, P. R. China.
J Nanosci Nanotechnol. 2018 Jul 1;18(7):5001-5006. doi: 10.1166/jnn.2018.15299.
Magnetic core-shell structure (1-x)Ni0.5Zn0.5Fe2O4/xSiO2 (x = 0-0.2) nanopowders were successfully prepared via the methanol combustion process, the as-prepared magnetic core-shell structure nanopowders were characterized by XRD, SEM, TEM, HRTEM, BET, and VSM techniques, and the adsorption performance of DNA onto them was investigated. The results showed that the magnetic core-shell structure 0.9Ni0.5Zn0.5Fe2O4/0.1SiO2 nanopowders exhibited a good adsorption capacity of DNA, and the adsorbance of DNA for magnetic core-shell structure 0.9Ni0.5Zn0.5Fe2O4/0.1SiO2 nanopowders was enhanced to 2.8 times for Ni0.5Zn0.5Fe2O4 nanoparticles. The adsorption kinetics of DNA in aqueous solution onto the magnetic core-shell structure 0.9Ni0.5Zn0.5Fe2O4/0.1SiO2 nanopowders at room temperature were investigated, and the kinetics data were in good agreement with the pseudo-first-order kinetic model in the initial DNA concentration of 50 μg/mL.
通过甲醇燃烧法成功制备了磁核壳结构(1-x)Ni0.5Zn0.5Fe2O4/xSiO2 (x = 0 - 0.2)纳米粉末，采用XRD、SEM、TEM、HRTEM、BET和VSM技术对所制备的磁核壳结构纳米粉末进行了表征，并研究了DNA在其上的吸附性能。结果表明，磁核壳结构0.9Ni0.5Zn0.5Fe2O4/0.1SiO2纳米粉末对DNA表现出良好的吸附能力，DNA对磁核壳结构0.9Ni0.5Zn0.5Fe2O4/0.1SiO2纳米粉末的吸附量比Ni0.5Zn0.5Fe2O4纳米颗粒提高了2.8倍。研究了室温下DNA水溶液在磁核壳结构0.9Ni0.5Zn0.5Fe2O4/0.1SiO2纳米粉末上的吸附动力学，在初始DNA浓度为50 μg/mL时，动力学数据与准一级动力学模型吻合良好。
