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首页> 外文期刊>International Journal of Electrochemical Science >Simultaneous Determination of Hydroquinone and Catechol using Carbon Glass Electrode Modified with Graphene Quantum Dots
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Simultaneous Determination of Hydroquinone and Catechol using Carbon Glass Electrode Modified with Graphene Quantum Dots

机译：石墨烯量子点修饰的碳玻璃电极同时测定对苯二酚和邻苯二酚

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摘要

In this study, an electrochemical sensor for the simultaneous detection of hydroquinone (HQ) andcatechol (CC) was fabricated on glassy carbon electrode (GCE) modified with graphene quantum dots(GQDs). The prepared GQDs were characterized by transmission electron microscope and fouriertransform infrared spectroscopy. The GQDs/GCE, which prepared by electrodeposition method, andcharacterized by electrochemical impedance spectra, exhibited excellent electrochemical catalysis andconductive properties for HQ and CC. Owing to the high electroactive surface area, good electrocatalyticactivity and low charge transfer resistance of GQDs, HQ and CC can be easily measured simultaneouslyfor the large separation of oxidation peak potentials (113 mV) and do not interfere with each other. Underthe optimal experimental condition, the oxidation peak currents were linear to HQ/CC in the range from0.5 μM to 100 μM with the same low detection limits of 0.08 μM (S/N=3). Simultaneous determinationof HQ and CC with such electrode was conducted in river water samples with reliable recovery between97.90% and 103.9%.
机译：在这项研究中，在石墨烯量子点（GQDs）修饰的玻璃碳电极（GCE）上制造了用于同时检测对苯二酚（HQ）和邻苯二酚（CC）的电化学传感器。通过透射电子显微镜和傅里叶变换红外光谱对制备的GQDs进行表征。通过电沉积法制备并通过电化学阻抗谱表征的GQDs / GCE对HQ和CC表现出优异的电化学催化性能和导电性能。由于高电活性表面积，良好的电催化活性和GQD的低电荷转移阻力，HQ和CC可以很容易地同时测量，因为氧化峰电位（113 mV）的分离较大，并且彼此之间不产生干扰。在最佳实验条件下，氧化峰电流与HQ / CC呈线性关系，范围为0.5μM至100μM，检测限相同，为0.08μM（S / N = 3）。用这种电极同时测定河水样品中的HQ和CC，回收率在97.90％至103.9％之间。

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