|
Abstract
|
In this work, a sensitive and efficient light enhanced electrochemical dopamine sensor based on
tungsten oxide nanoparticles electrodeposited on MXene nanosheets modified pencil graphite
electrode (MXene-WOx/PGE) was reported. The prepared substrate was carefully characterized with
field emission scanning electron microscopy, energy dispersive X-ray analysis, Raman spectroscopy,
electrochemical impedance spectroscopy and voltammetry techniques in details. The surface area of
MXene-WOx/PGE was increased 3.75 times in compare with WOxNPs/PGE proving the role of MXene as
a suitable 2D nanomaterials on the electrode surface. The synergistic effect of 2D MXene and tungsten
oxide nanoparticles resulted an improved light current response and admirable photocatalytic
properties. Linear range, sensitivity and detection limit of the prepared photoelectrochemical sensor
for dopamine were reported to be 10–400 nM, 0.028 mA nM− 1 and 1 nM respectively. The proposed
sensor was utilized for photoelectrochemical detection of dopamine in serum samples with suitable
reproducibility, stability and selectivity.
|