具有磁偶极相互作用诱导的类玉米状、可回收 γ-FeO@SiO@TiO 光催化剂。
Corn-like, recoverable γ-FeO@SiO@TiO photocatalyst induced by magnetic dipole interactions.
机构信息
School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen, 041004, China.
Research Institute of Materials Science of Shanxi Normal University & Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology, Linfen, 041004, China.
出版信息
Sci Rep. 2017 Jul 31;7(1):6960. doi: 10.1038/s41598-017-07417-z.
Corn-like, γ-FeO@SiO@TiO core/shell heterostructures were synthesized by a modified solvothermal reduction combined with a sol-gel method. SiO shells were first deposited on monodisperse FeO microspheres by a sol-gel method. FeO@SiO@TiO corn-like heterostructures were then obtained by sequential TiO coating, during which the magnetic dipolar interactions induced the anisotropic self-assembly process. After annealing at 350 °C, the crystalized TiO enhanced photocatalytic activity, while FeO was converted to γ-FeO. The corn-like γ-FeO@SiO@TiO photocatalyst can be recycled and reused by magnet extraction. Despite the photocatalytic activity decreased with each cycle, it can be completely recovered by moderate heating at 200 °C.
通过改进的溶剂热还原结合溶胶-凝胶法合成了玉米状的 γ-FeO@SiO@TiO 核/壳异质结构。首先通过溶胶-凝胶法在单分散 FeO 微球上沉积了 SiO 壳。然后通过顺序 TiO 涂层获得了 FeO@SiO@TiO 玉米状异质结构，在此过程中，磁偶极相互作用诱导了各向异性的自组装过程。在 350°C 退火后，结晶的 TiO 增强了光催化活性，而 FeO 则转化为 γ-FeO。玉米状的 γ-FeO@SiO@TiO 光催化剂可以通过磁提取进行回收和再利用。尽管光催化活性随每个循环而降低，但通过在 200°C 适度加热可以完全恢复。
Zotero 插件