Three-dimensional interconnected porous carbon nanosheets were prepared through pyrolyzing sodium D-isoascorbic acid, and were thoroughly characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The specific surface area and pore size distribution of the porous carbon nanosheets were characterized by N₂ adsorption desorption. The thickness of the carbon nanosheet was measured by atomic force microscopy (AFM). An electrochemical sensor was fabricated by the modification of the porous carbon nanosheets onto a glassy carbon electrode surface. The electrochemical behaviors of hydroquinone (HQ) and catechol (CA) on the electrochemical sensor were investigated by cyclic voltammetry and differential pulse voltammetry. Under the optimized conditions, the peak currents were found to be linear to the HQ and CA concentrations in the range from 0.4 to 20 μmol L⁻¹, and the detection limits were 0.028 μmol L⁻¹ (HQ) and 0.035 μmol L⁻¹ (CA), respectively.

中文翻译：

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用D-异抗坏血酸钠直接合成高度多孔的互连碳纳米片，用于同时测定儿茶酚和对苯二酚

通过热解D-异抗坏血酸钠制备了三维互连多孔碳纳米片，并通过扫描电子显微镜（SEM），透射电子显微镜（TEM）和X射线衍射（XRD）进行了全面表征。用N ₂表征多孔碳纳米片的比表面积和孔径分布吸附解吸。碳纳米片的厚度通过原子力显微镜（AFM）测量。通过将多孔碳纳米片修饰到玻璃碳电极表面上来制造电化学传感器。通过循环伏安法和差分脉冲伏安法研究了对苯二酚（HQ）和邻苯二酚（CA）在电化学传感器上的电化学行为。在优化的条件下，发现峰值电流与HQ和CA浓度呈线性关系，范围为0.4至20μmolL ^-1，检测限为0.028μmolL ^-1（HQ）和0.035μmolL ^-1（CA）。