Synthesis of magnetically separable Sn doped magnetite/silica core-shell structure and photocatalytic property

Journal Article · Tue Jun 15 04:00:00 EDT 2010 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2010.02.017· OSTI ID:22207316

Wang, Wei-Wei ^[1]; Yao, Jia-Liang ^[1]

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1. School of Materials Science and Engineering, Shandong University of Technology, 12 Zhang Zhou Road, Zibo, Shandong 255049 (China)

Sn doped Fe{sub 3}O{sub 4}/SiO{sub 2} core-shell structures with the magnetic and photocatalytic properties have been successfully synthesized using Fe{sub 3}O{sub 4} microspheres as the precursor. The morphology, phase and structure of the bifunctional products were investigated by X-ray powder diffraction, transmission electron microscopy, selected-area electron diffraction, high-resolution transmission electron microscopy, energy dispersive spectroscopy, and scanning electron microscopy. The effects of the amount and hydrolysis rate of tetraethyl orthosilicate on the preparation of the Fe{sub 3}O{sub 4}/SiO{sub 2} core-shell structures were investigated. Low concentration and slow hydrolysis rate of tetraethyl orthosilicate were useful to obtain the uniform silica coated Fe{sub 3}O{sub 4}. The magnetic measurements indicated that the Sn doped Fe{sub 3}O{sub 4}/SiO{sub 2} core-shell structures showed ferromagnetic property and the magnetic saturation value slightly decreased after coated the silica layer. The magnetic Sn doped Fe{sub 3}O{sub 4}/SiO{sub 2} core-shell structures exhibited good photocatalytic activity in the degradation of methyl orange and could be separated by applying an appropriate magnetic field.

• OSTI ID: 22207316
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 6 Vol. 45; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DOPED MATERIALS
ELECTRON DIFFRACTION
FERRITES
HYDROLYSIS
IRON OXIDES
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETITE
METHYL ORANGE
SCANNING ELECTRON MICROSCOPY
SILICA
SILICATES
SILICON OXIDES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION