碳基复合电极：制备、表征及其在电分析中的应用
Carbon-based Composite Electrodes: Preparation, Characterization and Application in Electroanalysis.
作者信息
Corb Ioana, Manea Florica, Radovan Ciprian, Pop Aniela, Burtica Georgeta, Malchev Plamen, Picken Stephen, Schoonman Joop
机构信息
"Politehnica" University of Timisoara, P-ta Victoriei, nr.2, 300006, Timisoara, Romania.
West University of Timisoara, Str. Pestalozzi, Nr.16, 300115, Romania.
出版信息
Sensors (Basel). 2007 Nov 5;7(11):2626-2635. doi: 10.3390/s7112626.
Electrodes based on carbon, i.e., expanded graphite (20%, wt.)-epoxy composite(20EG-Epoxy) and expanded graphite (20%, wt.)-polystyrene composite (20EG-PS) havebeen prepared, characterized using scanning electron microscopy (SEM) and cyclicvoltammetry (CV), and tested as anodic sensors. The electrodes exhibited good mechanicalresistance and low electrical resistances. Scan rate dependent cyclic voltammetry responsesat 20EG-Epoxy and 20EG-PS composite electrodes, which were exemplified for thiourea(TU), a toxic sulphur organic compound selected as testing target analyte in 0.1 M Na₂SO₄ supporting electrolyte, were investigated. The obtained voltammetric data were inaccordance with those for a random array of microelectrodes. The voltammetric andchronoamperometric detection results of TU in tap water samples, without a supplementaryaddition of supporting electrolyte, at 20EG-Epoxy electrode proved its use for directanalysis of environmental samples.
已制备了基于碳的电极，即膨胀石墨（20%，重量）-环氧树脂复合材料（20EG-环氧树脂）和膨胀石墨（20%，重量）-聚苯乙烯复合材料（20EG-聚苯乙烯），使用扫描电子显微镜（SEM）和循环伏安法（CV）对其进行了表征，并作为阳极传感器进行了测试。这些电极表现出良好的机械抗性和低电阻。研究了20EG-环氧树脂和20EG-聚苯乙烯复合电极上扫描速率依赖的循环伏安响应，以硫脲（TU）为例，硫脲是一种有毒的含硫有机化合物，在0.1 M Na₂SO₄支持电解质中被选作测试目标分析物。获得的伏安数据与微电极随机阵列的数据一致。在20EG-环氧树脂电极上，在不额外添加支持电解质的情况下，对自来水样品中TU的伏安和计时电流检测结果证明了其可用于环境样品的直接分析。
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