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中文摘要：
以FeCl3·6H2O为铁源,乙二醇或1,2丙二醇为溶剂,聚乙二醇（PEG）为表面活性剂,NaOH或KOH为碱源,采用溶剂热法制备了具有亲水性、分散性好、超顺磁性和形貌各异的Fe3O4微-纳米颗粒,并对其形貌、结构和磁性进行了表征.结果表明,产物均为立方晶系Fe3O4,其颗粒尺寸在20～600 nm范围内可调.考察了碱源的种类和用量、反应时间及溶剂等对产物形貌的影响,其中碱的用量影响最大.本文对不同形貌Fe3O4的形成过程进行了探讨,并提出了合理的解释.所得Fe3O4粒子在室温下呈现超顺磁性,可以初步满足在生物医学中应用的要求.
英文摘要：
The micro-nano magnetite particles（Fe3O4） with hydrophilic,good distribution,superparamagnetic and different shape were synthesized using a solvothermal method,where FeCl3·6H2O as iron source,ethylene glycol or 1,2-propylene glycol as solvent,PEG as surfactant and NaOH or KOH as the alkali source.Their morphologies,structures and magnetism are characterized.The results show that all the products are cubic phase of Fe3O4,with an adjustable particle size from 20 nm to 600 nm.We also investigated the influences of the alkali type and amount,reaction time,solvent and other conditions on the morphology and found that the amount of alkali was the greatest impact.In this paper,the processes of the formation of Fe3O4 with different morphologies were discussed,and a reasonable mechanism was also briefly suggested.The resulting Fe3O4 particles with superparamagnetic property at room temperature can basically meet the biomedical requirements.
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