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二苯基硫脲自组装膜电极的制备及其特性

The Study on Preparation and Characteristics of Diphenylthiourea Self-Assembled Monolayer Electrode
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摘要 藉金硫键将二苯基硫脲组装在金电极上,形成二苯基硫脲自组装膜电极.利用循环伏安法(CV)和微分脉冲伏安法(DPV),考察氧化还原指示剂在自组装膜上的电子传递过程,并运用离子通道理论探讨膜电极与醋酸根阴离子的作用机理.实验结果表明,二苯基硫脲自组装膜电极在1.0mol·L^-1,V(氯化钾):V(乙氰)为3:2的混合底液中,随着加入醋酸根阴离子阴离子的增加,指示剂的氧化还原峰峰最流增大,峰形查逆性变好,且DPV峰电流与醋酸根阴离子浓度在0~0.07mol·L^-1范围内呈现线性关系. Diphenylthiourea were assembled onto the gold electrode surface with Au-S bond to form a diphenylthiourea self-assembled monolayers (SAMs) Au electrode. The electron transfer process of the oxidoreduction-indicator had been studied by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods and the interaction mechanisms of the self-assembled monolayer were discussed. Results showed that the curve shape of oxidation-reduction indicator was improved and the current increasing with the more adding of AC^- in 1. 0 mol · L^-1 KCl/CH3CN (volume ratio=3 : 2) mixed solution. The linear relationship of the DPV currents and the concentrations means the SAMs electrode can be used in anion electrochemical recognition.
出处 《华侨大学学报(自然科学版)》 CAS 北大核心 2006年第4期372-374,共3页 Journal of Huaqiao University(Natural Science)
基金 国家自然科学基金资助项目(20575023) 福建省自然科学基金资助项目(D0410019 D0310016) 国务院侨务办公室科研基金资助项目(03QZR12)
关键词 二苯基硫脲 自组装膜 醋酸根阴离子 膜电极 循环伏安法 微分脉冲伏安法 diphenylthiourea, self-assembled monolayer, AC^- , cyclic voltammetry mothods, differential pulse voltammetry methods
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