金对用于吸附微污染物的 PEDOT 纳米管改性电极的界面效应

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Synthetic Metals Pub Date : 2024-09-20 DOI:10.1016/j.synthmet.2024.117755

Ana L. Soares , Thiago N.M. Cervantes , Diogo S. Pellosi , Luís F. Marchesi , Frederico L.F. Soares , Marcio Vidotti

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引用次数: 0

摘要

本研究采用电化学方法合成了含有金纳米粒子（AuNPs）的聚（3,4-亚乙二氧基噻吩）纳米管（PEDOT-NTs），并利用原位拉曼光谱电化学方法对其进行了详细表征。导电聚合物与金属纳米颗粒（AuNPs）的结合增强了 PEDOT-NTs 的导电性和表面积，而这正是电化学传感器的关键因素。为了更好地了解改性电极的行为，在电极表面添加了两种不同的微污染物质--丁基苯甲酸酯和三氯生，并进行了光谱电化学表征。拉曼成像显示，微污染物质的吸附增加了 PEDOT 纳米管中部分氧化段的存在，表明 PEDOT-NTs/AuNPs 修饰电极对微污染物质的存在具有敏感性。在这方面，进行了电化学阻抗光谱表征，结果与光谱电化学表征结果一致，即电荷转移电阻随着微污染物浓度的增加而成正比增加。因此，本研究工作表明，将 PEDOT 纳米管与 AuNPs 纳米粒子装饰的独特特性结合起来，开发用于检测环境中有机分子的装置是很有潜力的。

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Interfacial effects of gold on PEDOT nanotubes modified electrodes employed for the adsorption of micropollutants

In this work poly(3,4-ethylenedioxythiophene) nanotubes (PEDOT-NTs) containing gold nanoparticles (AuNPs) were electrochemically synthesized and characterized in detail by using in situ Raman spectroelectrochemistry. Combining conducting polymers and metallic nanoparticles (AuNPs) enhanced conductivity and superficial area of PEDOT-NTs, key factors for electrochemical sensors. In order, to better understand the modified electrodes behavior, two different micropollutants, butylparaben and triclosan, were added onto the electrode surface and the spectroelectrochemical characterization was done. The Raman imaging showed that micropollutants adsorption increases the presence of partially oxidized segments in PEDOT nanotubes, showing that PEDOT-NTs/AuNPs modified electrodes has sensitivity to micropollutants presence. In this regard the electrochemical impedance spectroscopy characterization was performed and agrees with the spectroelectrochemical characterization results, in which the charge-transfer resistance increase proportionally with the micropollutants concentration. Therefore, the present work shows the potentiality of combining the unique characteristics of the PEDOT nanotubes decorated with AuNPs nanoparticles to develop devices for detection of organic molecules of environmental interest.

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来源期刊

Synthetic Metals 工程技术-材料科学：综合

CiteScore

8.30

自引率

4.50%

发文量

189

审稿时长

33 days

期刊介绍： This journal is an international medium for the rapid publication of original research papers, short communications and subject reviews dealing with research on and applications of electronic polymers and electronic molecular materials including novel carbon architectures. These functional materials have the properties of metals, semiconductors or magnets and are distinguishable from elemental and alloy/binary metals, semiconductors and magnets.