Synthesis Characterization and Photocatalytic Studies of Cobalt Ferrite-Silica-Titania Nanocomposites

被引：57

作者：

Greene, David ^{[1
,2
]}

Serrano-Garcia, Raquel ^{[1
,2
]}

Govan, Joseph ^{[1
,2
]}

Gun'ko, Yurii K. ^{[1
,2
,3
]}

机构：

[1] Univ Dublin Trinity Coll, Sch Chem, Dublin 2, Ireland

[2] Trinity Coll Dublin, CRANN, Dublin 2, Ireland

[3] St Petersburg Natl Res Univ Informat Technol Mech, St Petersburg 197101, Russia

来源：

NANOMATERIALS | 2014年 / 4卷 / 02期

关键词：

magnetic nanoparticles; core-shell; silica; titanium dioxide; photocatalysis; magnetic separation; MAGNETIC NANOPARTICLES; ANATASE; REACTIVITY;

D O I：

10.3390/nano4020331

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this work, CoFe2O4@SiO2@TiO2 core-shell magnetic nanostructures have been prepared by coating of cobalt ferrite nanoparticles with the double SiO2/TiO2 layer using metallorganic precursors. The Transmission Electron Microscopy (TEM), Energy Dispersive X-Ray Analysis (EDX), Vibrational Sample Magnetometer (VSM) measurements and Raman spectroscopy results confirm the presence both of the silica and very thin TiO2 layers. The core-shell nanoparticles have been sintered at 600 degrees C and used as a catalyst in photo-oxidation reactions of methylene blue under UV light. Despite the additional non-magnetic coatings result in a lower value of the magnetic moment, the particles can still easily be retrieved from reaction mixtures by magnetic separation. This retention of magnetism was of particular importance allowing magnetic recovery and re-use of the catalyst.

引用

页码：331 / 343

页数：13

共 32 条

[31] Synthesis and characterization of monodisperse ultra-thin silica-coated magnetic nanoparticles [J].

Zhang, Ming ;

Cushing, Brian L. ;

O'Connor, Charles J. .

NANOTECHNOLOGY, 2008, 19 (08)

[32] Raman scattering study on anatase TiO2 nanocrystals [J].

Zhang, WF ;

He, YL ;

Zhang, MS ;

Yin, Z ;

Chen, Q .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2000, 33 (08) :912-916

← 1 2 3 4 →