Ag modified Fe3O4@TiO2 magnetic core-shell nanocomposites for photocatalytic degradation of methylene blue

被引：26

作者：

Tedsree, Karaked ^{[1
]}

Temnuch, Natcha ^{[1
]}

Sriplai, Nipaporn ^{[2
]}

Pinitsoontorn, Supree ^{[2
]}

机构：

[1] Burapha Univ, Fac Sci, Dept Chem, Nanocatalysis Lab, Chon Buri 20131, Thailand

[2] Khon Kaen Univ, Fac Sci, Dept Phys, Khon Kaen 40002, Thailand

来源：

MATERIALS TODAY-PROCEEDINGS | 2017年 / 4卷 / 05期

关键词：

magnetic nanocomposite; photocatalytic degradation; methylene blue; TIO2; NANOPARTICLES;

D O I：

10.1016/j.matpr.2017.06.170

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic nanocomposites consisting of different mass ratios of Fe3O4 cores to Ag-modified TiO2 shells (Fe3O4@ Ag/TiO2 magnetic nanocomposites) were synthesized by three-step methods: co-precipitation, sol-gel and chemical deposition methods. The morphology, size and elemental compositions of the obtained nanocomposites were characterized using transmission electron microscopy (TEM) and scanning electron microscopy coupled with energy dispersive X-Ray (SEM-EDX) spectroscopy. TEM images showed that Fe3O4 nanoparticles were coated by ultra-small TiO2 nanoparticles and X-Ray diffraction (XRD) analysis clearly demonstrated the existence of their amorphous phase. Vibration sample magnetometer (VSM) analysis showed that the synthesized nanocomposites composed of superparamagnetic properties. Photoluminescence spectroscopy and UV-Vis diffuse reflectance spectroscopy was used to study their optical properties. In addition, methylene blue was used as a model compound for studying photocatalytic degradation efficiency of the synthesized nanocomposites compared to bare TiO2. The greater efficiency of Fe3O4@Ag/TiO2 magnetic nanocomposite under visible light was achieved and the limitations of separation can be overcome. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：6576 / 6584

页数：9

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