An approach to widen the electrochemical sensor on dopamine based on the electrode of a MWCNT/RTIL/ CrHCF composite

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.