Abstract Hierarchical porous ZnO/Fe3O4 composites were fabricated through a facile surfactant-free method. The as-prepared samples were characterized using different instrumental techniques. The X-ray diffraction and energy dispersive X-ray results showed that the as-prepared samples were two-phase photocatalysts consisted of ZnO and Fe3O4. The UV–vis diffuse reflectance spectroscopy result indicated that the addition of Fe3O4 modified the optical properties of the photocatalysts. Under visible light irradiation, the ZnO/Fe3O4 exhibited enhanced photocatalytic performance for phenol degradation and Escherichia coli inactivation compared to ZnO. The photocatalytic enhancement of ZnO/Fe3O4 was attributed to the effective electron-hole pairs separation as verified by the photoluminescence spectra. The ZnO/Fe3O4 also exhibited magnetic properties, which can easily be recovered using an external magnet along with good reusability.

中文翻译：

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具有增强的磁性、光催化和抗菌性能的分级多孔 ZnO/Fe 3 O 4 复合材料的简便制备

摘要 通过一种简便的无表面活性剂方法制备了分层多孔 ZnO/Fe3O4 复合材料。使用不同的仪器技术对制备的样品进行表征。X 射线衍射和能量色散 X 射线结果表明，所制备的样品是由 ZnO 和 Fe3O4 组成的两相光催化剂。UV-vis漫反射光谱结果表明Fe3O4的加入改变了光催化剂的光学性质。在可见光照射下，与 ZnO 相比，ZnO/Fe3O4 在苯酚降解和大肠杆菌灭活方面表现出增强的光催化性能。光致发光光谱证实，ZnO/Fe3O4 的光催化增强归因于有效的电子-空穴对分离。ZnO/Fe3O4 也表现出磁性，