Abstract:
It is difficult to develop reliable techniques for the quick detection of heavy metal ions and
related chemical species in water. There are many different species of mercury in the
environment, and these species bio-amplify and become methylated to become organo-Hg
species. Using FeCoMOF/PANI-NH2 as the starting substrate, we created a novel
electrochemical technique called differential pulse voltammetry (DPV) for the quick
screening of free Hg
+2
in water on a metal-organic framework (MOF) platform. Using
bimetallic MOF structures incorporate on polyaniline surface that enhance the stability and
conductivity of composite. To improve Hg 2 + detection performance, FeCoMOF/PANI-NH2
nanocomposites were added to the GCE. The conductivity and sensitivity of the
FeCoMOF/PANI-NH2/GCE was higher than that of pure FeCoMOF/GCE. Because
functionalized conductive polymers forms on FeCoMOF as a result of presence different
metal nodes, electroanalytical performance is greatly enhanced. For the electrochemical
detection of Hg
+2
, the GCE treated with FeCoMOF/PANI-NH2 nanocomposite demonstrated
the greatest performance. Furthermore, the findings from the electrochemical impedance
spectrum (EIS) and cyclic voltammetry (CV) tests verified that the FeCOMOF/PANI-NH2
increased the rate of electron transfer at the solid-liquid interface.
ix
The DPV results shows the Hg
+2
detection or quantification at this newly chemically
modified sensing electrode. The detection limited (LOD) of modified electrode. The
FeCoMOF/PANI-NH2 chemically altered sensor shows promise for tracking Hg
+2
at
trace level.
