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为了加快银纳米线材料的合成速度,在制备过程中利用L-半胱氨酸作为反应过程中形成Ag2S胶体的硫源,将合成银纳米线的前驱体硝酸银的浓度提高到了1 mol/L,利用扫描电子显微镜、透射电子显微镜和X射线衍射仪对制备的银纳米线材料进行了表征,利用循环伏安法和电化学阻抗法对银纳米线修饰的铂电极电化学性能进行了研究.结果表明:L-半胱氨酸的引入可以明显降低体系中硝酸的浓度,提高银纳米线的产量,使得银纳米线的合成时间降低到20 min;电化学实验结果表明:制备的银纳米线材料具备良好的电子传递能力、较大的比表面积和较强的电化学性能,利用这些特点有望改善无酶传感器的性能.
In order to speed up the synthesis of silver nanowires, L-cysteine was used as the sulfur source to form Ag2S colloids in the preparation process, and the concentration of AgNO3 precursor was increased to 1 mol / L The prepared silver nanowires were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The electrochemical properties of silver nanowire modified Pt electrodes were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The results showed that the introduction of L-cysteine could significantly reduce the concentration of nitric acid in the system and increase the yield of silver nanowires, which reduced the synthesis time of silver nanowires to 20 min. The electrochemical experiments showed that the prepared silver nanowires Materials with good electron transfer ability, large specific surface area and strong electrochemical properties, the use of these features is expected to improve the performance of enzyme-free sensors.