【摘要】 以二价铁盐和三价铁盐为原料,采用化学共沉淀法制备了磁性纳米四氧化三铁（Fe₃O₄）,并采用3-氨基丙基-三甲氧基硅烷对其进行氨基化,制备出氨基化纳米Fe₃O₄。对氨基化纳米Fe₃O₄进行了表征及分析。研究结果表明:氨基已成功在纳米Fe₃O₄颗粒表面修饰,制得的氨基化纳米Fe₃O₄不含羟基铁等其他铁氧化物,改性后材料的磁性并没有发生明显变化。同时,研究了氨基化纳米Fe₃O₄吸附水中氟离子（F-）的动力学吸附机理,对F-的平衡吸附容量为4.7393mg/g,吸附符合动力学二级方程。更多还原

【Abstract】 Fe₃O₄ magnetic nanoparticles were prepared with the bivalent iron salt and trivalent iron salt as raw materials,and coprecipitation method.3-Aminopropyltrimethoxysilane was used to prepare amination Fe₃O₄ nanoparticle.Fe₃O₄ nanoparticles were characterized and analyzed.It was confirmed that the amino group was successfully modified on the surface of Fe₃O₄ nanoparticles,and the samples were free of other iron oxides such as hydroxyl iron.And the magnetism of material did not show great change after the modification.At the same time,the kinetic mechanism of adsorption of fluoride ions（F-）in ammoniated nano-Fe₃O₄ was studied.The equilibrium adsorption capacity of F-was 4.7393 mg/g,and the adsorption conformed to the kinetic second order equation.更多还原