Year-end Sale % OFF 
Abstract
A novel nonenzymatic hydrogen peroxide (H2O2) sensor has been fabricated by dispersing copper nanoparticles onto polypyrrole (PPy) nanowires by cyclic voltammetry (CV) to form PPy-copper nanocomposites on gold electrodes. Scanning electron microscopy (SEM) was used to characterize the morphologies of the PPy nanowires and the PPy-copper nanocomposite. The reactivity of the PPy-copper nanocomposite towards H2O2 was characterized by cyclic voltammetry and chronoamperometry. Effects of applied potential, the concentrations of detection solution upon the response currents of the sensor were investigated for an optimum analytical performance. It was proved that the PPy-copper nanocomposite showed excellent catalytic activity for the reduction of hydrogen peroxide (H2O2). The sensor showed a linear response to hydrogen peroxide in the concentration range between 7.0×10-6 and 4.3×10-3 mol L-1 with a high sensitivity, and a detection limit of 2.3×10-6 mol L-1. Experiment results also showed that the sensor had good stability.
Highlights
There is a need for economical, simple and reliable methods to detect hydrogen peroxide (H2O2), because of its use in many research fields such as the food industry, biotechnology, the clinic, the pharmaceutical industry and environmental protection [1, 3]
We have developed some biosensors based on multiwall carbon nanotube/gold nanoparticles and silver nanoparticles to immobilize Hb and horseradish peroxidase (HRP) for detection hydrogen peroxide [37, 38]
This paper describes a simple and effective method to fabricate a nonenzymatic hydrogen peroxide sensor by catalytic reduction with electropolyrized copper nanoparticles on the electrode modified with PPy nanowires
Summary
There is a need for economical, simple and reliable methods to detect hydrogen peroxide (H2O2), because of its use in many research fields such as the food industry, biotechnology, the clinic, the pharmaceutical industry and environmental protection [1, 3]. PPy film could be further improved by embedding metal particles into the polymer matrix to form a metal–polymer composite [22, 23] This polymer-metal nanocomposite can provide a highly porous structure with a large effective surface area, good electronic conductivity and high catalytic activity [24]. Though lacking an enzyme film, the sensor exhibited excellent performance features, such as low detection limits, wide linear range, quick current response, high sensitivity and good stability This may be due to the PPy-copper nanocomposite providing a large surface area, good electronic conductivity and high catalytic activity
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
