S-doped carbon materials have recently attracted much attention as electrode materials for electrocatalysis and sensors applications. Herein, we report a facile route for the preparation in situ of flake S-doped carbon nanomaterial by using plate-like sulfur-containing metal-organic frameworks (MOFs) as a pyrolytic precursor without additional carbon and sulfur sources. The resultant MOFs-derived carbon (denoted as PSMC) was further characterized and analyzed by scanning electron microscope, transmission electron microscope, X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy. Then a highly sensitive electrochemical sensor for selective determination of Hg (II) was achieved by designing PSMC as the active electrode material. The sensitivity of Hg (II) at the sensor is 2.12[Formula: see text][Formula: see text]A[Formula: see text]ppb[Formula: see text][Formula: see text]cm[Formula: see text] according to the slope of the calibration plot and electrode area. Finally, the PSMC-based sensor was proved feasible in river water sample analyses. This work may also provide a valuable clue for the preparation of flake S-doped carbon sensing material as a new application of MOFs-based materials.¡abs¿

中文翻译：

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金属有机骨架原位S掺杂片状碳材料的简便制备及其在Hg(II)电化学检测中的应用

S掺杂碳材料作为电催化和传感器应用的电极材料最近引起了广泛关注。在此，我们报告了一种通过使用片状含硫金属有机骨架（MOFs）作为热解前体而无需额外的碳和硫源原位制备片状S掺杂碳纳米材料的简便途径。通过扫描电子显微镜、透射电子显微镜、X 射线衍射、X 射线光电子能谱和拉曼光谱进一步表征和分析所得 MOF 衍生的碳（表示为 PSMC）。然后，通过将 PSMC 设计为活性电极材料，实现了一种用于选择性测定 Hg (II) 的高灵敏度电化学传感器。传感器对 Hg (II) 的灵敏度为 2.12[公式：见正文][公式：见正文]A[公式：见文]ppb[公式：见文][公式：见文]cm[公式：见文]根据标定图的斜率和电极面积。最后，基于 PSMC 的传感器在河水样本分析中被证明是可行的。这项工作也可能为制备片状S掺杂碳传感材料作为MOFs基材料的新应用提供有价值的线索。¡abs¿