摘要
磁性四氧化三铁(Fe_(3)O_(4))纳米材料具有高磁响应速率、超顺磁性和生物相容性等优良特性。通过对Fe_(3)O_(4)纳米材料的微观形貌进行调控,可以根据储能、催化、医药等实际应用需要,实现对其物理化学性能的有效控制。本文采用简易水热法,通过改变前驱体中Fe3+和Fe2+的比例、反应温度和反应时间等条件,在未添加形貌调控剂的情况下,制备出了粒径在10~25 nm的球形磁性Fe_(3)O_(4)纳米颗粒,最佳制备条件下材料的饱和磁化强度为73.3 emu·g^(-1)。结果表明,磁性Fe_(3)O_(4)纳米颗粒的磁性能与制备条件有着明显的关系,随着水热温度和时间增加,磁性纳米颗粒的粒径及饱和磁化强度先增加再减小。粒径越小,颗粒内部有效磁体积越小,因此饱和磁化强度越低。
Magnetic Fe_(3)O_(4)nanomaterials have excellent magnetic properties including high magnetic response,superparamagnetism and biocompatibility.By regulating the microscopic morphology of the materials,it is possible to achieve effectively control of its physical and chemical properties,such as energy storage,catalysis and medicine,in accordance with the requirements of practical applications.In this paper,according to modify the conditions including the ratio of Fe 3+and Fe 2+in the precursor,reaction temperature and reaction time,spherical magnetic Fe_(3)O_(4)nanoparticles with particle sizes ranging from 10 to 25 nm were synthesized by a facile hydrothermal method without the addition of a morphology modifier.And the saturation magnetization intensity of the material under the optimum conditions was 73.3 emu·g^(-1).The results show that the magnetic properties of Fe_(3)O_(4)nanoparticles have a clear relationship with the preparation conditions.With the increase of hydrothermal temperature and time,the particle size and saturation magnetization intensity of magnetic nanoparticles increase first and then decrease.The smaller the particle size is,the smaller the internal magnetic effective volume is,and therefore the lower the saturation magnetization intensity is.
作者
丁界雄
柳馨
铁生年
铁健
蒋自鹏
王雅慧
王培义
汪清海
DING Jiexiong;LIU Xin;TIE Shengnian;TIE Jian;JIANG Zipeng;WANG Yahui;WANG Peiyi;WANG Qinghai(College of Chemical Engineering and College of Energy and Electrical Engineering,Qinghai University,Xining 810016,China;College of Physics and Electronic Engineering,Qinghai Normal University,Xining 810016,China)
出处
《硅酸盐通报》
北大核心
2025年第5期1899-1910,共12页
Bulletin of the Chinese Ceramic Society
基金
青海省自然科学基金(2024-ZJ-770)。
关键词
磁性四氧化三铁
水热法
磁性能
饱和磁化强度
矫顽力
超顺磁性
magnetic Fe_(3)O_(4)
hydrothermal method
magnetic property
saturation magnetization intensity
coercivity
superparamagnetism
