Microemulsion-mediated solvothermal synthesis of hollow Co–Ni ferrite nanoparticle tubes and their magnetic properties

Micro & nano letters

article

Ying Gao¹  Yun Zhao¹  Min Fu¹  Qingze Jiao¹  Hansheng Li¹ 

[1] School of Chemical Engineering and the Environment, Beijing Institute of Technology

关键词: calcination;    cobalt compounds;    coercive force;    ferrites;    field emission electron microscopy;    magnetic particles;    microemulsions;    nanofabrication;    nanoparticles;    nanotubes;    nickel compounds;    scanning electron microscopy;    transmission electron microscopy;    X-ray diffraction;    nanomagnetics;    CoNiFe2O4;    temperature 500 degC;    size 200 nm to 400 nm;    temperature 293 K to 298 K;    microwave absorbers;    magnetic materials;    catalysts;    coercivity;    saturation magnetisation;    vibrating sample magnetometer;    magnetisation measurement;    X-ray diffractometer;    field emission scanning electron microscopy;    transmission electron microscopy;    composite oxalate precursors;    morphologies;    calcination;    hollow cobalt-nickel ferrite nanoparticle tubes;    magnetic properties;    microemulsion-mediated solvothermal synthesis;   

DOI  :  10.1049/mnl.2012.0921

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Hollow cobalt–nickel (Co–Ni) ferrite tubes with a diameter of about 200–400 nm and a length of several micrometres were synthesised by a microemulsion-based solvothermal method in combination with calcination at 500°C. The morphologies and structures of the Co–Ni ferrite tubes and their precursors of Co/Ni/Fe composite oxalate were characterised using a transmission electron microscopy, field emission scanning electron microscopy and an X-ray diffractometer. Magnetisation measurement was carried out using a vibrating sample magnetometer at room temperature. The saturation, magnetisation and coercivity of Co 0.5 Ni 0.5 Fe 2 O 4 nanoparticle tubes could reach 19.645 emu/g and 722.35 Oe, respectively. Therefore Co–Ni ferrite tubes could be easily prepared using this method and might be applied as catalysts, magnetic materials and microwave absorbers.

【 授权许可】

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