An approach to
widen the electrochemical sensor on dopamine based on the electrode of a MWCNT/RTIL/
CrHCF composite
Shenbagam K., Sivasankari G., Boobalan S., Uma Sivakami K. and Kannagi K.
Res. J. Chem. Environ; Vol. 27(8); 130-138;
doi: https://doi.org/10.25303/2708rjce1300138; (2023)
Abstract
The unique properties of carbon nanotubes make it very attractive for amperometric
sensors. The rapid development of new nanomaterials and nanotechnology has opened
up many opportunities for electrical analysis. Modification of the electrode surface
by transferring mechanical modifiers is a new field that requires extensive research.
This study demonstrates the expansion of electrochemical sensors based on MWCNT/RTIL/CrHCF
nano composites (MWCNT/RTIL/CrHCF) modified with graphite electrodes for the detection
of dopamine (DP) at 0.1 KNO3. (pH 7). The modified graphite composite electrode
(GCE) is equipped with an appropriate amount of chromium deposited on the surface
of MWCNT/RTIL/GCE and then hexacyanoferrate (CrHCF) is electrodeposited. Ultraviolet
visible radiation, HR TEM, XRD, FTIR, EIS and CV (cyclic voltammetry) were used
to examine the morphology and interface characteristics of the composite material.
The modified electrode has excellent partial discharge detection performance with
a linear range of 0.1 μM to 4.0 μM and a detection limit of 0.0121 nm (signal-to-noise
ratio = 3). Under the best conditions, the sensor shows excellent stability and
the results are satisfactory while analysing real samples.
