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Preparation and Characterization of Multifunctional Fe3O4/ZnO/SiIO2 Nanocomposites

Author: SunLiLi
Tutor: HongXia
School: Northeast Normal University
Course: Materials Physics and Chemistry
Keywords: Fe3O4/ZnO/SiO2 nanocomposites Superparamagnetic Resonance Raman
CLC: TB383.1
Type: Master's thesis
Year: 2011
Downloads: 25
Quote: 0
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Abstract


Starting in the water phase and the oil phase synthesis Fe 3 O 4 nanoparticles were prepared Fe 3 O 4 / ZnO , and Fe 3 O 4 / ZnO / SiO 2 new multifunctional nanocomposites , and through a variety of characterization methods these two nanocomposites , structure, magnetic properties and optical properties . Papers specific contents are as follows : 1. Coprecipitation method and pyrolysis the prepared Fe 3 O 4 nano particles in the aqueous phase and the oil phase . The preparation of these two approaches Fe 3 O 4 nanoparticle structure , magnetic properties were studied . Studies have shown that the inverse spinel structure of Fe 3 O 4 nanoparticles , superparamagnetic at room temperature . In contrast, pyrolysis prepared Fe 3 O 4 nanoparticles monodispersed better , more narrow size distribution , morphology more rules . 2 as Fe 3 O 4 nanoparticles based respectively in the aqueous phase and oil phase synthesized of Fe 3 O 4 < / sub> / ZnO nano- composites . Fe 3 O 4 / ZnO nano-composite material structure , optical properties and magnetic properties . Light-induced luminescence ( PL ) , Raman spectroscopy, and superconducting quantum interference device (SQUID) studies have shown that the two methods prepared Fe 3 O 4 / ZnO nanocomposites retain ZnO multi- phonon resonance Raman signal , light-induced luminescence signal with Fe 3 O 4 nanoparticles superparamagnetic . 3 St. ? Ber synthesized of Fe 3 the the O 4 / ZnO / SiO 2 nanocomposites . And the nano - composite structure , morphology , optical properties and magnetic properties . XPS, EDS test results prove that the SiO 2 has been successfully coated the the Fe 3 O 4 / ZnO nano- composite surface . Light-induced luminescence ( PL ) and Raman spectroscopy results show multifunctional Fe 3 < / sub > O 4 / ZnO / SiO 2 nanocomposites Fe 3 O 4 / ZnO nanocomposite optical properties and magnetic properties , and SiO 2 < / sub > introduction of ZnO not multi-level resonance Raman scattering impact .

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