Magnetic (γ-Fe2O3@SiO2)n@TiO2 Functional Hybrid Nanoparticles with Actived Photocatalytic Ability

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• 作者：Chengxiang Wang ; Longwei Yin* ; Luyuan Zhang ; Le Kang ; Xianfen Wang ; Rui Gao
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：March 12, 2009
• 年：2009
• 卷：113
• 期：10
• 页码：4008-4011
• 全文大小：167K
• 年卷期：v.113,no.10(March 12, 2009)
• ISSN：1932-7455

文摘

An easy chemical route for the synthesis of (γ-Fe₂O₃@SiO₂)_n@TiO₂ functional hybrid nanoparticles is reported in this paper. The hybrid nanoparticles are composed of spherical nanoparticles about 100 nm in diameter, with several γ-Fe₂O₃ fine particles about 15 nm in diameter as cores distributing within the titania matrix and silica as coatings and barrier layers between the magnetic cores and titania shells. The (γ-Fe₂O₃@SiO₂)_n@TiO₂ hybrid nanoparticles show good magnetic response and got together within 20 s in a magnetic field. Photodegradation examination of the magnetic hybrid nanoparticles was carried out in methylene blue solutions illuminated under UV light in a photochemical reactor. It is shown that the (γ-Fe₂O₃@SiO₂)_n@TiO₂ functional hybrid nanoparticles are photocatalytically actived. About 80% of methylene blue decomposed in 80 min in the presence of magnetic hybrid nanoparticles under illumination of UV light. The synthesized magnetic hybrid nanoparticles display high photocatalytic efficiency and will find potential applications for cleaning polluted water with the help of magnetic separation.