Electrodeposited Silver Nanoparticles on Carbon Ionic Liquid Electrode for Electrocatalytic Sensing of Hydrogen Peroxide

Abstract

Silver nanoparticles (narrowly dispersed in diameter) were electrodeposited on carbon ionic liquid electrode (CILE) surface using a two-step potentiostatic method. Potentiostatic double pulse technique was used as a suitable and simple method for controlling the size and morphologies of silver nanoparticles electrodeposited on CILE. The obtained silver nanoparticles deposited on CILE surface showed excellent electrocatalytic activity (low overpotential of À 0.35 V vs. Ag/AgCl) towards reduction of hydrogen peroxide. A linear dynamic range of 2 -200 mM with an experimental detection limit of 0.7 mM (S/N ¼ 3) and reproducibility of 4.1% (n ¼ 5) make the constructed sensor suitable for peroxide determination in aqueous solutions.

Nanobiosensors for health care

“…The combined existence of GNPs within CSNFs NW provides the excellent performance of the biosensor towards the electrochemical detection of cholesterol. Many researchers have reported the inclusion of metal nanoparticles with a catalytic effect in polymer modified electrodes to decrease the overpotential applied to the amperometric biosensors (Safavi et al, 2009, Hrapovic et al, 2004, Ren et al, 2005, Huang et al, 2004. Amperometric cholesterol biosensors based on carbon nanotube-chitosan-platinumcholesterol oxidase nanobiocomposite was fabricated for cholesterol determination at an applied potential of 0.4 V (Tsai et al, 2008).…”

Surface deposition of Ag and Au nano-isles on ZnO thin films yields enhanced photoelectrochemical splitting of water

“…The method permits deposition of high-purity metal nanoparticles on substrates of varying sizes and shapes, with greater control over the density [22]. In continuation to our previous reports on PEC splitting of water, using nanostructured undoped/doped metal oxides, the present work is an endeavor to enhance the PEC performance of [23][24][25][26][27][28].…”

A Hydrogen Peroxide Sensor Based on Silver Nanoparticles Biosynthesized by Bacillus subtilis

“…[21][22][23] Yang et al [24] obtained silver microdendrites by one-step synthesized as novel separation mediums, the resulted silver micro-dendrites were applied in multi-DNA analysis. Safavi et al [25] electrodeposited AgNPs on carbon ionic liquid electrode surface through a two-step potentiostatic method for electrocatalytic sensing of H 2 O 2 . Moreover, Geng et al [26] have proposed a physical vapor deposition method to form AgNPs, and found that the obtained AgNPs could improve the signals of surface enhanced Raman spectroscopy.…”