Emerging technologies in the field of environmental remediation are becoming increasingly significant owing to the increasing demand for eliminating significant amounts of pollution in water, soil, and air. We designed and synthesized MoS₂/Fe₂O₃ heterojunction nanocomposites (NCs) as multifunctional materials that are easily separated and reused. The trace detection performance of the prepared sample was examined using bisphenol A (BPA) as the probe molecule, with limits of detection as low as 10⁻⁹ M; this detection limit is the lowest among all reported semiconductor substrates. BPA was subjected to rapid photocatalytic degradation by MoS₂/Fe₂O₃ NCs under ultraviolet irradiation. The highly recyclable MoS₂/Fe₂O₃ NCs exhibited photo-Fenton catalytic activity for BPA and good detection ability when reused as a surface-enhanced Raman scattering (SERS) substrate after catalysis. The SERS and photocatalysis mechanisms were proposed while considering the effects of the Z-scheme charge-transfer paths, three-dimensional flower-like structures, and dipole–dipole coupling. Moreover, the prepared MoS₂/Fe₂O₃ NCs were successfully applied in the detection of BPA in real lake water and milk samples. Herein, we present insights into the development of MoS₂/Fe₂O₃ materials, which can be used as multifunctional materials in chemical sensors and in photocatalytic wastewater treatments for the removal of recalcitrant organic pollutants.

由于消除水、土壤和空气中大量污染的需求不断增加，环境修复领域的新兴技术变得越来越重要。我们设计并合成了MoS ₂ /Fe ₂ O ₃异质结纳米复合材料（NC）作为易于分离和重复使用的多功能材料。以双酚A（BPA）为探针分子检测所制备样品的痕量检测性能，检测限低至10 ^-9 M；该检测限是所有报道的半导体基材中最低的。 MoS ₂ /Fe ₂ O ₃ NCs在紫外线照射下对BPA进行快速光催化降解。高度可回收的MoS ₂ /Fe ₂ O ₃ NCs在催化后作为表面增强拉曼散射（SERS）底物重新使用时，表现出对BPA的光芬顿催化活性和良好的检测能力。提出了SERS和光催化机制，同时考虑了Z型电荷转移路径、三维花状结构和偶极-偶极耦合的影响。此外，制备的MoS ₂ /Fe ₂ O ₃ NCs成功应用于实际湖水和牛奶样品中BPA的检测。在此，我们提出了对MoS ₂ /Fe ₂ O ₃材料开发的见解，该材料可用作化学传感器和光催化废水处理中的多功能材料，以去除顽固的有机污染物。