Preparation and Photocatalytic Performance of Magnetic TiO2/Montmorillonite/Fe3O4 Nanocomposites

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• 作者：Ping Zhang ; Zunli Mo ; Lijuan Han ; Xiaobo Zhu ; Bo Wang ; Chun Zhang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：May 14, 2014
• 年：2014
• 卷：53
• 期：19
• 页码：8057-8061
• 全文大小：338K
• 年卷期：v.53,no.19(May 14, 2014)
• ISSN：1520-5045

文摘

Magnetic TiO₂/montmorillonite (MMT) /Fe₃O₄ nanocomposites were prepared by a single step of hydrolysis. First, a tetra-n-butyl titanate microemulsion wrapping Fe₃O₄ nanoparticles (NPs) was established through ultrasonic process. Then, the microemulsion was intercalated into MMT layers by vigorous stirring. Thereafter, in a controllable hydrolysis process, the TiO₂ NPs were embedded into the layers of MMT. The adsorption and photocatalytic activity were evaluated by using the methylene blue (MB) as contaminants. The results indicated that anatase-TiO₂ NPs (10鈥?0 nm in diameter) were embedded in the layers of MMT and Fe₃O₄ NPs (45鈥?0 nm in diameter) were deposited on the surface of MMT. Additionally, ca. 94% of the initial MB was decomposed by TiO₂/MMT/Fe₃O₄ nanocomposite after 80 min UV irradiation, while ca. 85% of the initial MB was decomposed by TiO₂ NPs. Furthermore, after being used 6 times, the TiO₂/MMT/Fe₃O₄ nanocomposite still maintained a high degradation rate and revealed good reuseability.