Lengthy one-dimensional magnetite (Fe3O4) sub-microfibers with excellent electrochemical performance.
One dimensional Fe3O4sub-microfibers with an average diameter of about 920nm and length of about 25μm were prepared by hydrothermal synthesis in the presence of sodium citrate (Na3cit). The physicochemical properties were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). It was found that Fe3O4crystal nuclei were generated from different Fe2+-citrate complexes under hydrothermal conditions and Na3cit as a capping agent promoted the formation of Fe3O4microfibers. The Fe3O4nanocrystals grew along the (110) axis on the exposed (111) facet, and then further formed microfibers via an oriented attachment mechanism during the collisions. Polyvinylpyrrolidine (PVP) was more conducive to microfibers growth in comparison to polyethyleneglycol 4000 (PEG-4000), cetyltrimethylammonium bromide (CTAB) and sodium dodecyl sulfate (SDS). The electrochemical measurements show that the Fe3O4sub-microfibers had a specific capacitance of 117.6Fg-1with good cycling performance.
College of Mining Technology, Taiyuan University of Technology, Taiyuan 030024, Shanxi, PR China.
Jianchao
J
Ma
School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, Shaanxi, PR China.
Jiali
J
Chang
School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, Shaanxi, PR China.
Hongzhu
H
Ma
School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, Shaanxi, PR China.
Duoduo
D
Zhang
Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Ministry of Education and Shanxi Province, Taiyuan 030024, Shanxi, PR China. Electronic address: maqingliang@tyut.edu.cn.
Qingliang
Q
Ma
Department of Chemical Engineering, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia. Electronic address: shaobin.wang@curtin.edu.au.
Shaobin
S
Wang
Electrochemistry; Fe(3)O(4) microfibers; Growth mechanism; Hydrothermal synthesis; Sodium citrate