Silver nanoparticles-embedded poly(1-naphthylamine) nanospheres for low-cost non-enzymatic electrochemical H 2 O 2 senso
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Silver nanoparticles‑embedded poly(1‑naphthylamine) nanospheres for low‑cost non‑enzymatic electrochemical H2O2 sensor Femina Kanjirathamthadathil Saidu1,2 · Alex Joseph3 · Eldhose Vadakkechalil Varghese3 · George Vazhathara Thomas1 Received: 3 July 2019 / Revised: 12 October 2019 / Accepted: 4 December 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2019
Abstract In this work, a novel nanocomposite containing silver nanoparticles (AgNPs) embedded poly(1-naphthylamine) nanospheres (Ag/PNA) was prepared by in situ chemical reduction of silver nitrate. The structure, composition, and morphology of the prepared Ag/PNA nanocomposites were established by Fourier transform infrared spectrometry, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The electrochemical properties of the PNA and Ag/PNA-modified carbon paste electrodes were analyzed using cyclic voltammetry (cyclic voltammogram) and electrochemical impedance spectroscopy. It is observed that the electrochemical and charge transfer characteristics of PNA have significantly enhanced upon the incorporation of AgNPs. The prepared Ag/PNA nanocomposite has shown impressive electrocatalytic and electrochemical sensing performance toward H 2O2. Remarkably, the present Ag/PNA-based enzymeless voltammetric H2O2 sensor showed a wide detection range in the concentration range of 1–3000 μM with a lower detection limit of 0.972 μM. The study revealed that Ag/PNA-modified carbon paste electrodes are an ideal platform for the fabrication of low-cost non-enzymatic H2O2 sensor with high sensitivity, good reproducibility, better selectivity, and stability.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s0028 9-019-03053-x) contains supplementary material, which is available to authorized users. * George Vazhathara Thomas [email protected] 1
Department of Chemistry, St. Joseph’s College, Moolamattom, Idukki, Kerala 685591, India
2
Department of Chemistry, Maharaja’s College, Ernakulam, Kerala 682011, India
3
Department of Chemistry, Newman College, Thodupuzha, Kerala 685584, India
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Polymer Bulletin
Graphic abstract
Keywords Electrochemical sensor · Hydrogen peroxide · Silver nanocomposites · Polynaphthylamine
Introduction Due to the unique optoelectronic and electrochemical attributes, metal nanoparticles (MNPs), especially those of silver, gold, and platinum, have been studied extensively as an active component for catalysis and electrochemical sensing [1–3]. Moreover, MNPs have large surface area and surface energy [4]. However, MNPs generally lose their structural and morphological uniqueness on agglomeration when subjected to extreme thermal or chemical treatment. Therefore, in order to achieve efficient and reproducible performance in their practical applications, proper dispersion and stabilization of MNPs are required. Several techniques have been reported for active stabilization of MNPs, which includes the use of differen
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