Abstract

Silver nanoparticles-decorated poly(m-aminophenol) nanofibers (PmAPNFs) was prepared through the initial synthesis of PmAPNFs via chemical polymerization of m-aminophenol with ammonium persulfate (APS) and NaOCl as oxidizing agents, followed by thermo-chemical reduction of Ag⁺ ions into Ag nanoparticles on the PmAPNFs. Different spectroscopic and morphological analyses confirmed the formation of Ag nanoparticles (AgNPs) on the surface of PmAPNFs. As-prepared PmAPNFs/AgNPs nanocomposite showed remarkable catalytic activity toward the electro-oxidation reaction of glucose in NaOH medium. The PmAPNFs/AgNPs based biosensor demonstrated a very low detection limit of 0.062 µM (S/N = 3) together with high sensitivity (17.45 µAmM⁻¹cm⁻²) and wide linear range (0.1 − 8 mM). It has short response time (∼7 s) even at lower concentration of glucose. It also exhibited strong tolerance against various electroactive interfering agents during glucose sensing process. The present PmAPNFs/AgNPs nanocomposite could be a promising material for the fabrication of highly sensitive, environment-friendly and low-cost enzyme-free glucose sensor devices.

摘要

银纳米颗粒装饰聚（米氨基苯酚）的纳米纤维（PmAPNFs）通过经由化学聚合PmAPNFs的初始合成制备米氨基苯酚与过硫酸铵（APS）和次氯酸钠作为氧化剂，接着通过热化学还原的Ag ⁺离子进入 PmAPNF 上的 Ag 纳米粒子。不同的光谱和形态分析证实了在 PmAPNFs 表面形成了 Ag 纳米粒子 (AgNPs)。制备的 PmAPNFs/AgNPs 纳米复合材料对葡萄糖在 NaOH 介质中的电氧化反应显示出显着的催化活性。基于 PmAPNFs/AgNPs 的生物传感器表现出非常低的检测限，为 0.062 µM ( S / N = 3) 以及高灵敏度 (17.45 µAmM ^-1 cm ^-2 ) 和宽线性范围 (0.1 - 8 mM)。即使在较低的葡萄糖浓度下，它的响应时间也很短（~7 秒）。它还在葡萄糖传感过程中对各种电活性干扰剂表现出很强的耐受性。目前的 PmAPNFs/AgNPs 纳米复合材料可能是一种很有前途的材料，可用于制造高灵敏度、环保和低成本的无酶葡萄糖传感器装置。