Synthesis of a Thin-Layer MnO2 Nanosheet-Coated Fe3O4 Nanocomposite as a Magnetically Separable Photocatalyst

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• 作者：Lishu Zhang ; Jianshe Lian ; Longyun Wu ; Zhenrong Duan ; Jun Jiang ; Lijun Zhao
• 刊名：Langmuir
• 出版年：2014
• 出版时间：June 17, 2014
• 年：2014
• 卷：30
• 期：23
• 页码：7006-7013
• 全文大小：512K
• 年卷期：v.30,no.23(June 17, 2014)
• ISSN：1520-5827

文摘

A facile hydrothermal method combined with a mild ultrasonic means has been developed for the fabrication of a magnetically recyclable thin-layer MnO₂ nanosheet-coated Fe₃O₄ nanocomposite. The photocatalytic studies suggest that the MnO₂/Fe₃O₄ nanocomposite shows excellent photocatalytic efficiency and stability simultaneously for the degradation of methylene blue under UV鈥搗is light irradiation. Moreover, its good acid resistance and stable recyclability are very important for its future practical application as a photocatalyst. Magnetic measurements verify that the MnO₂/Fe₃O₄ nanocomposite possesses a ferromagnetic nature, which can be effectively separated for reuse by simply applying an external magnetic field after the photocatalytic reaction. This novel composite material may have potential applications in water treatment, degradation of dye pollutants, and environmental cleaning.