Development of chemically modified carbon paste electrodes with transition metal complexes anchored on silica gel

The chemically modified silica gel with 3-(2-aminoethyl)aminopropyl]trimethoxysilane groups and p-aminobenzoic acid was used to immobilize the nickel (II) and cobalt(II) metallic ions complex initially. These materials were incorporated into a carbon paste electrode and its electrochemical propertie...

Full description

Saved in:
Bibliographic Details
Published in:Materials chemistry and physics 2017-01, Vol.186, p.470-477
Main Authors: Cazula, Bárbara B., Lazarin, Angélica M.
Format: Article
Language:English
Subjects:
3-(2-aminoethyl)aminopropyl]trimethoxysilane
Anodizing
Carbon paste electrode
Cobalt
Coordination compounds
Cyclic voltammetry
Dopamine
Electrocatalysis
Electrochemical analysis
Electrodes
Nickel
Oxidation
p-Aminobenzoic acid
Silica
Silica gel
Silicon dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The chemically modified silica gel with 3-(2-aminoethyl)aminopropyl]trimethoxysilane groups and p-aminobenzoic acid was used to immobilize the nickel (II) and cobalt(II) metallic ions complex initially. These materials were incorporated into a carbon paste electrode and its electrochemical properties were investigated. However, for dopamine and B6 vitamin solution, an enhancement of the anodic peak current was detected due to electrocatalytic oxidation. The electrodes presented the same response for at least 150 successive measurements, with a good repeatability. The modified electrodes are very stable and reproducible. The sensors were applied for dopamine and B6 vitamin determination in pharmaceutical preparation with success. •The chemically modified silica gel adsorbed whit nickel (II) and cobalt(II) metallic ions complex was prepared.•These newly synthesized compounds were incorporated into a carbon paste electrode.•The electrodes did not show significant changes in response after six months of use.•The modified electrodes are very stable and reproducible.•The electrodes sensors were successfully applied for B6 Vitamin and dopamine determination.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2016.11.021