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Preparation and Characterization of Zn1-xNixFe2O4 Nanoparticles with Spinel Structure Synthesized by Hydrothermal Method

[ Vol. 14 , Issue. 6 ]

Author(s):

Xueliang Zhu, Zhiqiang Wei*, Wenhua Zhao, Xu-dong Zhang, Xiao-juan Wu and Jin-Long Jiang   Pages 474 - 480 ( 7 )

Abstract:


Background: Among the mixed transition metal oxides, ZnFe2O4 as a binary metal oxide with a spinel structure has a wide range of application prospects in materials science and technology. The microstructure, energy band structure, optical properties and magnetic properties of ZnFe2O4 can be modified by element doping.

Objective: In this work, the influences of Ni doping upon the structure, morphology, optical and magnetic properties of ZnFe2O4 were studied.

Methods: Pure and Ni-doped Zn1-xNixFe2O4 nanoparticles with different concentration (x = 0, 0.1, 0.3 and 0.5) were successfully synthesized by hydrothermal method. XRD, HRTEM, XEDS, UV– vis, FT-IR and VSM were utilized to investigate the Zn1-xNixFe2O4 nanocrystals samples.

Results: The experimental results show that all Zn1-xNixFe2O4 nanoparticles have cubic spinel structure with good crystallization. Ni2+ successfully substituted for the lattice site of Zn2+ and generated single-phase ZnFe2O4 without other impurity phases. After Ni doping, the grain size distribution increased, the bandwidth increased and ferromagnetism increased.

Conclusion: The crystalline size increased as Ni concentration increased, while its the lattice constant occurshrink expansion. The energy band gap of Zn1-xNixFe2O4 nanocrystals increased as Ni concentration increased, and blue shift occurred compared to that of the pure ZnFe2O4. Pure ZnFe2O4 nanocrystals showed superparamagnetic properties, while the doped Zn1-xNixFe2O4 samples have obvious ferromagnetic properties at room temperature.

Keywords:

Ni doped, ZnFe2O4, hydrothermal method, microstructure, optical properties, magnetic properties.

Affiliation:

State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, School of Science, Lanzhou University of Technology, Lanzhou 730050, School of Science, Lanzhou University of Technology, Lanzhou 730050, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050

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