In this work, the effective exfoliation of MoS using supercritical carbon dioxide (SCCO) processing is demonstrated. The impact of temperature, pressure, and reaction time on the exfoliation efficiency and properties of the obtained MoS nanosheets were investigated. Higher pressure yields smaller MoS nanosheets, attributed to enhanced CO intercalation and weakened van der Waals forces. Elevated temperatures facilitated more efficient exfoliation through increased CO mobility. The effect of reaction time revealed a correlation between prolonged SCCO exposure and the production of thinner MoS nanosheets, emphasizing the temporal aspect in achieving enhanced exfoliation. X-ray Photoelectron Spectroscopy (XPS) and Raman spectroscopy confirm a temperature-dependent transition from 2H‐MoS to 1T‐MoS. Selected Area Electron Diffraction (SAED) patterns verified the crystal structure remained intact despite these changes. This comprehensive investigation enhances our understanding of the SCCO exfoliation process, offering a foundation for tailored fabrication of MoS nanosheets for diverse applications in materials science and nanotechnology.

中文翻译：

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SCCO2剥离处理中不同条件下MoS2纳米片的物理化学性质

在这项工作中，证明了使用超临界二氧化碳 (SCCO) 处理可以有效剥离 MoS2。研究了温度、压力和反应时间对所得MoS纳米片的剥离效率和性能的影响。较高的压力会产生较小的 MoS2 纳米片，这归因于 CO 嵌入的增强和范德华力的减弱。温度升高通过增加二氧化碳流动性促进更有效的剥落。反应时间的影响揭示了延长 SCCO 暴露与更薄的 MoS2 纳米片的产生之间的相关性，强调了实现增强剥落的时间方面。 X 射线光电子能谱 (XPS) 和拉曼光谱证实了从 2H-MoS2 到 1T-MoS2 的温度依赖性转变。选区电子衍射 (SAED) 图案验证了尽管发生这些变化，晶体结构仍然完好无损。这项全面的研究增强了我们对 SCCO 剥离过程的理解，为材料科学和纳米技术领域的各种应用定制 MoS 纳米片的制造奠定了基础。