Abstract Here, we report the transformation of the manifold layers of bulk WS2 into one-dimensional (1D) WS2 nanostructures using one-pot and energy efficient supercritical fluid (SCF) processing with a short reaction time of 30 min at 400 °C. The exfoliation of few layer WS2 nanosheets followed by self-scrolling into 1D WS2 nanostructures under the SCF processing was confirmed by XRD, Raman, UV–Visible, FE-SEM, HR-TEM, and AFM analysis. Moreover, the as-synthesized 1D WS2 nanostructures emitted a strong blue colour and exhibited the excitation-dependent photoluminescence behaviour owing to the formation of polydisperse size distribution of the WS2 nanostructures. Remarkably, a substantial electrochemical hydrogen evolution reaction has been found in the as-synthesized 1D WS2 nanostructures with the onset potential of ~230 mV vs RHE and a Tafel slope of 112 mV/dec. Consequently, the prepared 1D WS2 nanostructures can be considered to be a promising candidate for photoluminescence and electrochemical hydrogen evolution.

中文翻译：

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通过用于析氢反应的一锅超临界流体处理将多层 WS2 纳米片转化为一维发光 WS2 纳米结构

摘要 在这里，我们报告了使用一锅和节能超临界流体 (SCF) 处理在 400°C 下以 30 分钟的短反应时间将块状 WS2 的歧管层转化为一维 (1D) WS2 纳米结构。XRD、拉曼、UV-Visible、FE-SEM、HR-TEM 和 AFM 分析证实了几层 WS2 纳米片的剥离，然后在 SCF 处理下自卷成一维 WS2 纳米结构。此外，合成的一维 WS2 纳米结构发出强烈的蓝色，并由于 WS2 纳米结构的多分散尺寸分布的形成而表现出依赖于激发的光致发光行为。值得注意的是，在合成的 1D WS2 纳米结构中发现了大量的电化学析氢反应，起始电位相对于 RHE 约为 230 mV，塔菲尔斜率为 112 mV/dec。因此，制备的一维 WS2 纳米结构可以被认为是光致发光和电化学析氢的有希望的候选者。