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A simple, cost-effective and selective analysis of glucose via electrochemical impedance sensing based on copper and nitrogen co-doped carbon quantum dots
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-07-15 , DOI: 10.1039/d0nj01754j Haiyan Wu 1, 2, 3, 4, 5 , Yu Yan 4, 5, 6, 7 , Qingshuang Huang 4, 5, 6, 7 , Guobin Liang 4, 5, 6, 7 , Fengxian Qiu 2, 3, 4, 8 , Zhaolian Ye 4, 5, 6, 7 , Dan Liu 4, 5, 6, 7
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-07-15 , DOI: 10.1039/d0nj01754j Haiyan Wu 1, 2, 3, 4, 5 , Yu Yan 4, 5, 6, 7 , Qingshuang Huang 4, 5, 6, 7 , Guobin Liang 4, 5, 6, 7 , Fengxian Qiu 2, 3, 4, 8 , Zhaolian Ye 4, 5, 6, 7 , Dan Liu 4, 5, 6, 7
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Copper and nitrogen co-doped carbon quantum dots (Cu,N-CQDs) were prepared by a facile hydrothermal treatment, and they were further employed as a novel sensing material for fabricating a sensitive non-enzymatic glucose sensor. The morphologies and structures of the as-prepared materials were characterized by using UV-vis spectrophotometry, fluorescence (FL) spectrophotometry, Fourier transform infrared (FT-IR) spectrophotometry, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). It is interesting to note that the introduction of Cu into the as-prepared Cu,N-CQDs caused a ca. 4-fold increase over that of N-CQDs in the electrocatalytic oxidation peak current of glucose. The proposed sensor showed excellent sensitivity and selectivity for glucose detection in alkaline medium with a linear range of 5–700 μM, and the detection limit was calculated to be 1.22 μM (S/N = 3). Furthermore, the as-prepared sensor was utilized to detect glucose in a fermentation sample, suggesting the Cu and N co-doped CQDs as a promising candidate for fabricating sensors for the quantification of glucose.
中文翻译：
通过基于铜和氮共掺杂碳量子点的电化学阻抗感测，对葡萄糖进行简单，经济高效的选择性分析
通过简便的水热处理制备了铜和氮共掺杂的碳量子点（Cu，N-CQDs），并将它们进一步用作制造敏感的非酶葡萄糖传感器的新型传感材料。通过紫外可见分光光度法，荧光（FL）分光光度法，傅立叶变换红外（FT-IR）分光光度法，透射电子显微镜（TEM），X射线光电子能谱（XPS）表征了所制备材料的形貌和结构。 ，循环伏安法（CV）和电化学阻抗谱（EIS）。有趣的是，将铜引入已制备的Cu，N-CQD中导致了大约一个。葡萄糖的电催化氧化峰值电流是N-CQD的4倍。所建议的传感器在碱性介质中线性范围为5–700μM时，对葡萄糖检测显示出极好的灵敏度和选择性，计算出的检出限为1.22μM（S / N = 3）。此外，所制备的传感器被用于检测发酵样品中的葡萄糖，这表明铜和氮共掺杂的CQDs是制造葡萄糖定量传感器的有希望的候选者。
更新日期：2020-07-27
中文翻译：
通过基于铜和氮共掺杂碳量子点的电化学阻抗感测，对葡萄糖进行简单，经济高效的选择性分析
通过简便的水热处理制备了铜和氮共掺杂的碳量子点（Cu，N-CQDs），并将它们进一步用作制造敏感的非酶葡萄糖传感器的新型传感材料。通过紫外可见分光光度法，荧光（FL）分光光度法，傅立叶变换红外（FT-IR）分光光度法，透射电子显微镜（TEM），X射线光电子能谱（XPS）表征了所制备材料的形貌和结构。 ，循环伏安法（CV）和电化学阻抗谱（EIS）。有趣的是，将铜引入已制备的Cu，N-CQD中导致了大约一个。葡萄糖的电催化氧化峰值电流是N-CQD的4倍。所建议的传感器在碱性介质中线性范围为5–700μM时，对葡萄糖检测显示出极好的灵敏度和选择性，计算出的检出限为1.22μM（S / N = 3）。此外，所制备的传感器被用于检测发酵样品中的葡萄糖，这表明铜和氮共掺杂的CQDs是制造葡萄糖定量传感器的有希望的候选者。
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