Synthesis of Zn, Mn doped Fe3O4 Nanoparticles with Tunable Size

doi:10.15541/jim20190013

Abstract

Abstract:

Zn, Mn doped Fe₃O₄ magnetic nanoparticles have broad application prospects in biomedicine for their excellent magnetic properties. Therein, the most remarkable property of magnetic nanoparticles is size-dependent biomagnetic applications, and size variation also affect their magnetic characteristics. Therefore, based on the specific requirements of size for various biological applications, it is critical to regulate their size. In this study, we synthesized 5-20 nm Zn, Mn doped Fe₃O₄ magnetic nanoparticles by changing reflux time duration, varying metal precursor and adding oil phase reducing agent (1,2-hexadecanediol). It is found that addition of 1,2-hexadecanediol is beneficial to the formation of smaller nanoparticles, while metal chloride and longer reflux time are helpful to prepare larger particles. Additionally, there exists a positive correlation between particle size and saturation magnetization.

Key words: Zn,Mn-Fe₃O₄ nanoparticles, size regulation, magnetic characteristics

CLC Number:

TQ174

CHENG Tian-Sheng, PAN Jiong, XU Ying-Ying, BAO Qun-Qun, HU Ping, SHI Jian-Lin. Synthesis of Zn, Mn doped Fe₃O₄ Nanoparticles with Tunable Size[J]. Journal of Inorganic Materials, 2019, 34(8): 899-903.

Figures/Tables 5

Fig. 1 TEM images of ZnMn-Fe3O4 nanoparticles and histograms of their size distributions obtained by Fe(acac)3, Mn(acac)2 and Zn(acac)2 with (a, c) and without (b, d) adding 1,2-hexadecanediol

Fig. 2 TEM image (a), histograms of their size distributions (b), high-resolution TEM image (c) and selected area electron diffraction (SAED) pattern (d) of 15 nm-sized ZnMn-Fe3O4 nanoparticles prepared from Fe(acac)3, MnCl2 and ZnCl2

Fig. 3 TEM images of 20 nm-sized ZnMn-Fe3O4 nanoparticles synthesized from Fe(acac)3, MnCl2 and ZnCl2 with different reflux time durations of 1.5 h (a) and 2 h (b), and the corresponding histograms of size distributions of 1.5 h (c) and 2 h (d)

Fig. 4 XRD patterns (a), FT-IR spectra (b) and energy dispersive X-ray spectroscopy (EDS) data (c) of 5 nm, 10 nm, 15 nm, and 20 nm-sized ZnMn-Fe3O4 nanoparticles

Fig. 5 Magnetic hysteresis curve (a) and d-1-dependent Ms curve (b) of 5-20 nm-sized ZnMn-Fe3O4 nanoparticles

References 25

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Synthesis of Zn, Mn doped Fe₃O₄ Nanoparticles with Tunable Size

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