Chemical Research in Chinese Universities ›› 2016, Vol. 32 ›› Issue (2): 159-164.doi: 10.1007/s40242-016-5383-4

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Shape-controlled Synthesis of Fe3O4 Nanocrystals with Incontinuous Multicavities

ZHAN Conghong2, CHENG Rongmin2, FANG Beibei1, ZHAO Lijun1   

  1. 1. Key Laboratory of Automobile Materials, Ministry of Education, School of Materials Science and Engineering, Jilin University, Changchun 130022, P. R. China;
    2. College of Chemistry, Jilin University, Changchun 130012, P. R. China
  • Received:2015-10-04 Revised:2015-11-06 Online:2016-04-01 Published:2015-11-23
  • Contact: ZHAO Lijun E-mail:lijunzhao@jlu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.51501068).

Abstract:

In the solvothermal synthesis process, the effect of NaOH dosages of from 0.3 g to 4.0 g on the morphology evolution(from nanoparticles to octahedra) of Fe3O4 crystals was carefully investigated. Meanwhile, the growth process of Fe3O4 crystals at different reaction time was also investigated. Furthermore, it has been found that the particle size and crystallinity of Fe3O4 crystals can be controlled by the dosages of NaOH. In this paper, the increases of both the reaction time and the NaOH concentrations correspond to a minimization process of surface energy for Fe3O4 crystals. During the synthesis process, the addition of N2H4·H2O and ethylene glycol in the magnetite not only facilitated the narrow distribution of particle size but also contributed to the formation of incontinuous multicavities with a diameter of about 5 nm.

Key words: Fe3O4 nanocrystal, Incontinuous multicavity, Magnetic property