A Non‐Enzymatic Hydrogen Peroxide Sensor Based on Gold Nanoparticles/Carbon Nanotube/Self‐Doped Polyaniline Hollow Spheres. Issue 7 (11th June 2014)

• Record Type: Journal Article
• Authors: Chen, Xiaojun; Guo, Buhua; Hu, Pingping; Wang, Yan
• Is Part Of: Electroanalysis. Volume 26:Issue 7(2014:Jul.)
• Page Start: 1513
• Page End: 1521
• Publication Date: 2014-06-11
• Subjects: Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201400080
• Languages: English
• ISSNs: 1040-0397

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>In this study, a novel non‐enzymatic hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) sensor was fabricated based on gold nanoparticles/carbon nanotube/self‐doped polyaniline (AuNPs/CNTs/SPAN) hollow spheres modified glassy carbon electrode (GCE). SPAN was in‐site polymerized on the surface of SiO<sub>2</sub> template, then AuNPs and CNTs were decorated by electrostatic absorption via poly(diallyldimethylammonium chloride). After the SiO<sub>2</sub> cores were removed, hollow AuNPs/CNTs/SPAN spheres were obtained and characterized by transmission electron microscopy (TEM), field‐emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR). The electrochemical catalytic performance of the hollow AuNPs/CNTs/SPAN/GCE for H<sub>2</sub>O<sub>2</sub> detection was evaluated by cyclic voltammetry (CV) and chronoamperometry. Using chronoamperometric method at a constant potential of −0.1 V (vs. SCE), the H<sub>2</sub>O<sub>2</sub> sensor displays two linear ranges: one from 5 µM to 0.225 mM with a sensitivity of 499.82 µA mM<sup>−1</sup> cm<sup>−2</sup>; another from 0.225 mM to 8.825 mM with a sensitivity of 152.29 µA mM<sup>−1</sup> cm<sup>−2</sup>. The detection limit was estimated as 0.4 µM (signal‐to‐noise ratio of 3). The hollow AuNPs/CNTs/SPAN/GCE also demonstrated excellent stability and selectivity against interferences from other electroactive species. The sensor was further applied to determine H<sub>2</sub>O<sub>2</sub> in disinfectant real samples.</p> </abstract>