Hematite Nanoparticles-Modified Electrode Based Electrochemical Sensing Platform for Dopamine

Abstract EN

Hematite (α-Fe2O3) nanoparticles were synthesized by the solid transformation of ferrous hydroxide and ferrihydrite in hydrothermal condition.

The as-prepared α-Fe2O3 nanoparticles were characterized by UV-vis, PL, XRD, Raman, TEM, AFM, FESEM, and EDX analysis.

The experimental results indicated the formation of uniform hematite nanoparticles with an average size of 45 nm and perfect crystallinity.

The electrochemical behavior of a GC/α-Fe2O3 electrode was studied using CV and EIS techniques with an electrochemical probe, [Fe(CN)6]3−/4− redox couple.

The electrocatalytic activity was investigated toward DA oxidation in a phosphate buffer solution (pH 6.8) by varying different experimental parameters.

The chronoamperometric study showed a linear response in the range of 0–2 μM with LoD of 1.6 μM for DA.

Square wave voltammetry showed a linear response in the range of 0–35 μM with LoD of 236 nM for DA.