Open AccessMicroemulsion‐mediated solvothermal synthesis of hollow Co–Ni ferrite nanoparticle tubes and their magnetic properties
Author(s) -
Gao Ying,
Zhao Yun,
Fu Min,
Jiao Qingze,
Li Hansheng
Publication year - 2013
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2012.0921
Subject(s) - microemulsion , materials science , nanoparticle , chemical engineering , ferrite (magnet) , cobalt ferrite , metallurgy , nanotechnology , composite material , pulmonary surfactant , engineering
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.