In this study, molybdenum disulfide (MoS₂) microsphere was prepared and employed as a visible-light catalyst for the photocatalytic degradation of thiobencarb (TBC), a carbamate pesticide. The as-prepared MoS₂ photocatalyst was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). TBC elimination using MoS₂ proved to be efficient and practical in both deionized and environmental water samples. This photocatalytic method presented a set of advantages over other TBC removal processes such as using visible light source without the need of costly additives (e.g.·H₂O₂). Optimization studies of this process showed that the degradation efficiency could reach 95% in 12 h at a pH range of 6–9. Further, the effect of anions (Cl⁻ and NO₃⁻) was minor on the photocatalytic activity of MoS₂. Experiments using radical scavengers indicated that hydroxyl radicals and holes are the prevailing reactive species involved in this process. Three possible photodegradation pathways were proposed based on the major intermediates as verified by gas chromatography/mass spectrometry technique. The practicality of this MoS₂ photocatalyst was validated by its use in the removal of TBC from real water samples and by its stability and reusability in three successive runs, evidencing its prospective applications in the treatment of environmental water and contaminated wastewater samples.

在本研究中，制备了二硫化钼（MoS ₂）微球并将其用作可见光催化剂，用于光催化降解氨基甲酸酯农药硫代苯甲酸（TBC）。通过X射线衍射（XRD），扫描电子显微镜（SEM）和X射线光电子能谱（XPS）表征所制备的MoS ₂光催化剂。事实证明，在去离子水和环境水样品中，使用MoS ₂消除TBC都是有效和实用的。与其他TBC去除工艺相比，这种光催化方法具有一系列优势，例如使用可见光源而不需要昂贵的添加剂（例如H ₂ O ₂）。该工艺的优化研究表明，在pH范围为6–9的情况下，在12小时内降解效率可以达到95％。此外，阴离子（Cl组成的效果^-和NO ₃ ^- ）是在硫化钼的光催化活性次要₂。使用自由基清除剂的实验表明，羟基自由基和空穴是该过程中主要的反应性物质。基于主要中间体，提出了三种可能的光降解途径，并通过气相色谱/质谱技术进行了验证。MoS ₂的实用性 通过将光催化剂用于从实际水样品中去除TBC以及在三次连续运行中具有稳定性和可重复使用性，对光催化剂进行了验证，证明了其在处理环境水和受污染废水样品中的潜在应用价值。