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- Title
A Non-Enzymatic Hydrogen Peroxide Sensor Based on Gold Nanoparticles/Carbon Nanotube/Self-Doped Polyaniline Hollow Spheres.
- Authors
Chen, Xiaojun; Guo, Buhua; Hu, Pingping; Wang, Yan
- Abstract
In this study, a novel non-enzymatic hydrogen peroxide (H2O2) 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 SiO2 template, then AuNPs and CNTs were decorated by electrostatic absorption via poly(diallyldimethylammonium chloride). After the SiO2 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 H2O2 detection was evaluated by cyclic voltammetry (CV) and chronoamperometry. Using chronoamperometric method at a constant potential of −0.1 V (vs. SCE), the H2O2 sensor displays two linear ranges: one from 5 µM to 0.225 mM with a sensitivity of 499.82 µA mM−1 cm−2; another from 0.225 mM to 8.825 mM with a sensitivity of 152.29 µA mM−1 cm−2. 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 H2O2 in disinfectant real samples.
- Subjects
HYDROGEN peroxide; DETECTORS; GOLD nanoparticles; TRANSMISSION electron microscopy; FOURIER transform infrared spectroscopy; ENZYMES
- Publication
Electroanalysis, 2014, Vol 26, Issue 7, p1513
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201400080