In this work, we focus on synthesizing 3D hierarchical Fe₃O₄/ZnO hybrid nanostructures to improve the solar light photodegradation activity and magnetic reusability of the ZnO semiconductor. These hierarchical nanostructures (defined as 3D Fe₃O₄/ZnO HSt) were successfully synthesized using a simple sol–gel process with an average diameter of 200 nm. Analyses of surface area measurement, optical, magnetic, and photocatalytic properties reveal that 3D Fe₃O₄/ZnO HSt exhibits high specific surface area, redshift light absorption with a bandgap of 2.95 eV, and good magnetic response with saturation of 8.1 emu/g. As a result of its unique morphology, 3D Fe₃O₄/ZnO HSt displays good ability in the degradation of RhB under simulated solar light irradiation because of the high surface area, enhanced solar light absorption, and effective separation of charge carriers. The potential mechanism for the photodegradation of RhB of the 3D hierarchical Fe₃O₄/ZnO hybrid materials under solar light irradiation was proposed.

在这项工作中，我们专注于合成 3D 分层 Fe ₃ O ₄ /ZnO 杂化纳米结构，以提高 ZnO 半导体的太阳光光降解活性和磁可重用性。这些分级纳米结构（定义为 3D Fe ₃ O ₄ /ZnO HSt）是使用平均直径为 200 nm 的简单溶胶-凝胶工艺成功合成的。表面积测量、光学、磁性和光催化性能分析表明，3D Fe ₃ O ₄ /ZnO HSt 具有高比表面积，红移光吸收，带隙为 2.95 eV，磁响应良好，饱和度为 8.1 emu/g . 由于其独特的形态，3D Fe ₃ O₄ /ZnO HSt由于具有高表面积、增强的太阳光吸收和有效分离电荷载流子，在模拟太阳光照射下显示出良好的降解RhB的能力。提出了太阳光照射下3D分层Fe ₃ O ₄ /ZnO杂化材料RhB光降解的潜在机制。