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首页> 外文期刊>Electrocatalysis >Electrochemical Sensing Platform Based on Single-Walled Carbon Nanotubes (SWCNTs)/Gold Nanoparticles (AuNps) Nanocomposite
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Electrochemical Sensing Platform Based on Single-Walled Carbon Nanotubes (SWCNTs)/Gold Nanoparticles (AuNps) Nanocomposite

机译:基于单壁碳纳米管(SWCNT)/金纳米颗粒(AuNps)纳米复合材料的电化学传感平台

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摘要

In this paper, the electrochemical characterization and the application of a single-walled carbon nanotubes (SWCNTs)/gold nanoparticles (AuNps) nanocomposite-modified glassy carbon (GC) electrode for the preparation of electrochemical sensing platform are proposed. Inorganic electroactive compounds (i.e., probe molecules, potassium ferricyanide K3Fe(CN)6 and hexaammine ruthenium(III) chloride [Ru(NH3)6]Cl3) and molecules of biological interest such as dopamine (DA), catechol, and serotonin were employed to study their electrochemical responses at SWCNTs/AuNps/GC electrode and to compare them with those of GC bare electrode and of GC-modified electrode with SWCNTs or AuNps. The electrochemical behavior of DA, catechol, and serotonin is also investigated at two different pH values (pH 4.00 and 7.00). By comparing their electrochemical responses at SWCNTs/AuNps/GC electrode with those at conventional GC electrode, we observed different amplifications of the electrochemical signal ranging from 56% (pH 7.00) to 35% (pH 4.00) for catechol, from 73% (pH 7.00) to 35% (pH 4.00) for DA, and from 452% (pH 4.00) to 703% (pH 7.00) for serotonin; so, the nanocomposite resulted a promising material for a sensing platform.
机译:提出了单壁碳纳米管(SWCNTs)/金纳米粒子(AuNps)纳米复合修饰玻碳电极的电化学表征及其在电化学传感平台制备中的应用。使用了无机电活性化合物(例如,探针分子,铁氰化钾K3Fe(CN)6和六氨合氯化钌(III)[Ru(NH3)6] Cl3)和具有生物学意义的分子,例如多巴胺(DA),邻苯二酚和5-羟色胺研究它们在SWCNTs / AuNps / GC电极上的电化学响应,并将其与GC裸电极和带有SWCNTs或AuNps的GC修饰电极的电化学响应进行比较。还研究了DA,儿茶酚和5-羟色胺在两个不同的pH值(pH 4.00和7.00)下的电化学行为。通过将它们在SWCNTs / AuNps / GC电极上的电化学响应与常规GC电极上的电化学响应进行比较,我们观察到电化学信号对儿茶酚的放大率从56%(pH 7.00)到35%(pH 4.00),从73%(pH对于DA,血清素为7.00至35%(pH 4.00),对于血清素则为452%(pH 4.00)至703%(pH 7.00);因此,纳米复合材料为传感平台提供了一种有前途的材料。

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