Synthesis and characterization of Fe3O4-TiO2 core-shell nanoparticles

被引：94

作者：

Stefan, M. ^{[1
]}

Pana, O. ^{[1
]}

Leostean, C. ^{[1
]}

Bele, C. ^{[2
]}

Silipas, D. ^{[1
]}

Senila, M. ^{[3
]}

Gautron, E. ^{[4
]}

机构：

[1] Natl Inst R&D Isotop & Mol Technol, Cluj Napoca 400295, Romania

[2] Univ Agr Sci & Vet Med, Cluj Napoca 400372, Romania

[3] Res Inst Analyt Instrumentat, INCDO INOE 2000, Cluj Napoca 400293, Romania

[4] Inst Mat Jean Rouxel, F-44322 Nantes 3, France

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 116卷 / 11期

关键词：

MAGNETIC NANOPARTICLES; TIO2; NANOPARTICLES; IRON-OXIDE; PHOTOCATALYTIC ACTIVITY; SOL-GEL; ONE-POT; ANATASE; RUTILE; MICROSPHERES; TRANSITION;

D O I：

10.1063/1.4896070

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Composite core-shell nanoparticles may have morpho-structural, magnetic, and optical (photoluminescence (PL)) properties different from each of the components considered separately. The properties of Fe3O4-TiO2 nanoparticles can be controlled by adjusting the titania amount (shell thinness). Core-shell nanoparticles were prepared by seed mediated growth of semiconductor (TiO2) through a modified sol-gel process onto preformed magnetite (Fe3O4) cores resulted from the co-precipitation method. The structure and morphology of samples were characterized by X-ray diffraction, transmission electron microscopy (TEM), and high resolution-TEM respectively. X-ray photoelectron spectroscopy was correlated with ICP-AES. Magnetic measurements, optical absorption spectra, as well as PL spectroscopy indicate the presence of a charge/spin transfer from the conduction band of magnetite into the band gap of titania nanocrystals. The process modifies both Fe3O4 and TiO2 magnetic and optical properties, respectively. (C) 2014 AIP Publishing LLC.

引用

页数：11

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