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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Sensor based on Carbon Paste Electrode Modified by TiO2 nano-particles for the Voltammetric Determination of Resorcinol
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Electrochemical Sensor based on Carbon Paste Electrode Modified by TiO2 nano-particles for the Voltammetric Determination of Resorcinol

机译：TiO 2 纳米粒子修饰的碳糊电极电化学传感器用于间苯二酚的伏安测定

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TiO2 nano-particles were prepared and characterized by transmission electron microscope (TEM) and scanning electron microscope (SEM). A new carbon paste electrode modified by TiO2 nano-particles was manufactured and characterized. The modified electrode was prepared by mixing TiO2 nano- particles with graphite powder in presence of paraffin wax. The electrochemical activity of resorcinol (RS) was studied in Britton–Robinson (BR) buffer at different pH values using cyclic voltammetry (CV) and linear sweep (LSV). The results illustrated that the carbon paste modified electrode gave a good response for an electrocatalytic activity towards the electrochemical oxidation of RS. The electrochemical oxidation of RS at carbon paste electrode modified by TiO2 nano-particles was diffusion-controlled and irreversible. By applying the optimum conditions for the determination of RS, a lower detection limit of 1x10-9 M was obtained. This method was applied for the determination of RS in tap water samples, and the recovery for RS from this study was 94% to 101.1%.
机译：制备了TiO2纳米粒子，并通过透射电子显微镜（TEM）和扫描电子显微镜（SEM）表征。制备并表征了一种新型的TiO2纳米粒子修饰的碳糊电极。通过在石蜡的存在下将TiO2纳米颗粒与石墨粉混合来制备改性电极。使用循环伏安法（CV）和线性扫描（LSV）在不同的pH值下，在Britton-Robinson（BR）缓冲液中研究了间苯二酚（RS）的电化学活性。结果表明，碳糊修饰的电极对RS的电化学氧化具有良好的电催化活性响应。 TiO2纳米粒子修饰的碳糊电极上RS的电化学氧化是扩散控制和不可逆的。通过应用确定RS的最佳条件，获得了1x10-9 M的下限。该方法用于自来水样品中RS的测定，本研究中RS的回收率为94％至101.1％。

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