Arefeh Gorgij; Hamid Ahmar; Laleh Adlnasab
Abstract
This research aimed to develop a novel sensing platform for hydrogen peroxide (H2O2) quantification in the milk samples. The proposed sensor was fabricated using a glassy carbon electrode modified with Fe-Cu layered double hydroxide (LDH)/magnetic Fe3O4 nanoparticles (FeCu-LDH@Fe3O4/GCE). The resulting ...
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This research aimed to develop a novel sensing platform for hydrogen peroxide (H2O2) quantification in the milk samples. The proposed sensor was fabricated using a glassy carbon electrode modified with Fe-Cu layered double hydroxide (LDH)/magnetic Fe3O4 nanoparticles (FeCu-LDH@Fe3O4/GCE). The resulting sensor was characterized using field emission scanning, electron microscopy, x-ray diffraction, and infrared spectroscopy, with the addition of the electrochemical methods. After optimization of affecting parameters, the FeCu-LDH@Fe3O4/GCE exhibited a high electrocatalytic activity for H2O2 electroreduction; and high cathodic peak currents were obtained. The proposed electrode also illustrated a wide linear dynamic domain in the range of 2 to 400 µM; and low limit of detection was calculated to be 0.6 µM.
Tahereh Rohani; Moghadase Yahyapoor
Volume 4, Issue 1 , March 2017, , Pages 34-39
Abstract
In this work, a new method was developed for the catalytic reduction of hydrogen peroxide at glassy carbon electrode modified with silver nanoparticles and multi-wall carbon nanotubes. Silver incorporated in this modified electrode acted as catalyst to reduce hydrogen peroxide. First, the electrochemical ...
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In this work, a new method was developed for the catalytic reduction of hydrogen peroxide at glassy carbon electrode modified with silver nanoparticles and multi-wall carbon nanotubes. Silver incorporated in this modified electrode acted as catalyst to reduce hydrogen peroxide. First, the electrochemical behavior of silver, incorporated in modified electrode, was studied. The results illustrated the adsorption-controlled reaction at the modified electrode. Then, the behavior of catalytic reduction of hydrogen peroxide at the modified electrode was investigated. A linear calibration graph was obtained for hydrogen peroxide over the concentration range of 4.04×10−3 – 1.5×10−6 molL-1. The detection limit for hydrogen peroxide was estimated 1.42×10−7 molL-1. The relative standard deviation of ten replicate measurements (performed on a single electrode at hydrogen peroxide concentration of 1.5×10-4 molL−1) was 2.36%. The proposed electrode was used for the determination of hydrogen peroxide in real samples which led to satisfactory results.
