Semiconductor photocatalysts is a promising approach to combat both environmental pollution and global energy shortage despite the challenges of recycling and stability. In this paper, magnetic Fe₃O₄ particle is introduced in the system and Fe₃O₄/TiO₂/MoS₂ heterostructures can be formed in a facile strategy. The morphology and structure of Fe₃O₄/TiO₂/MoS₂ can be controlled by adjusting the hydrolysis rate of the titanium source. MoS₂ is designed to fill in the mesoporous of TiO₂ core, forming heterojunction on the surface and near-surface of TiO₂ under solvothermal conditions. With respect to the decomposition of a rhodamine B (RhB) solution under visible light, the Fe₃O₄/TiO₂/MoS₂ heterostructures display highly photocatalytic activities in aqueous solutions, and they can be easily recovered to realize cyclic utilization by applying an external magnetic field. Thus, the effective magnetic recycle of the catalyst is achieved, and high visible light catalytic activity is ensured simultaneously. Since the current method is simple and flexible to create recyclable catalysts with high stability in this way, it could promote the practicability of semiconductor photocatalysts in water treatment, degradation of dye pollutants, and environmental cleaning.

尽管存在回收和稳定性方面的挑战，但半导体光催化剂是解决环境污染和全球能源短缺的一种有前途的方法。本文将磁性Fe ₃ O ₄引入体系中，并以简便的策略形成Fe ₃ O ₄ / TiO ₂ / MoS ₂异质结构。可以通过调节钛源的水解速率来控制Fe ₃ O ₄ / TiO ₂ / MoS ₂的形态和结构。MoS ₂旨在填充TiO ₂的介孔在溶剂热条件下，在TiO ₂的表面和近表面上形成异质结。关于在可见光下若丹明B（RhB）溶液的分解，Fe ₃ O ₄ / TiO ₂ / MoS ₂异质结构在水溶液中显示出很高的光催化活性，并且通过施加外部磁场可以很容易地回收它们以实现循环利用。因此，实现了催化剂的有效磁循环，并且同时确保了高可见光催化活性。由于目前的方法简单灵活，可以通过这种方式创建具有高稳定性的可回收催化剂，因此可以提高半导体光催化剂在水处理，染料污染物的降解和环境清洁中的实用性。