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Electrochemical fabrication of gold nanoparticles decorated on activated fullerene C60: an enhanced sensing platform for trace level detection of toxic hydrazine in water samples

机译:电化学富勒烯C60修饰的金纳米颗粒的电化学制备:增强的传感平台,用于痕量检测水中的有毒肼

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摘要

A novel and highly sensitive amperometric hydrazine sensor was fabricated using gold nanoparticles (AuNPs) decorated on activated fullerene C60 (AC60) modified screen printed carbon electrode (SPCE). An electrochemical method was used for the fabrication of the AC60-AuNPs modified SPCE which was characterized by scanning electron microscopy and elemental analysis. The fabricated AC60-AuNPs modified SPCE showed an enhanced electrocatalytic activity towards hydrazine over that of other modified SPCEs. Furthermore, the detection potential of hydrazine was notably lower (0.161 V) at the AuNPs decorated AC60 modified SPCE than AuNPs decorated bare (0.208 V) and C60 (0.186 V) modified SPCEs. Under optimum conditions, the amperometric response of the sensor was linear over the hydrazine concentrations from 0.13 mu M to 1.21 mM with a fast response time of 1.3 s. In addition, the proposed sensor showed the lowest limit of detection (LOD) of 0.039 mu M, with a high sensitivity of 0.583 mu A mu M-1 cm(-2). The sensor also holds its high selectivity in the presence of common metal ions and biologically active interfering species. In addition, the practicality of the fabricated sensor in tap water samples is comparable with those detected by the HPLC method.
机译:使用在活化富勒烯C60(AC60)修饰的丝网印刷碳电极(SPCE)上装饰的金纳米颗粒(AuNPs),制造了一种新颖且高度灵敏的安培肼传感器。采用电化学方法制备了AC60-AuNPs修饰的SPCE,通过扫描电子显微镜和元素分析对其进行了表征。制成的AC60-AuNPs修饰的SPCE对肼的电催化活性高于其他修饰的SPCE。此外,在用AuNPs装饰的AC60修饰的SPCE上,肼的检测电势明显低于在裸金表面修饰的Au60s(0.208 V)和用C60(0.186 V)修饰的SPCE。在最佳条件下,传感器的安培响应在0.13μM至1.21 mM的肼浓度范围内呈线性,响应时间为1.3 s。此外,所提出的传感器显示出最低的检测限(LOD)为0.039μM,具有0.583μAμM-1 cm(-2)的高灵敏度。在常见的金属离子和具有生物活性的干扰物质存在下,该传感器还具有很高的选择性。此外,在自来水样品中制造的传感器的实用性与通过HPLC方法检测到的实用性相当。

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