Abstract:
HMIs contamination has increased all over the world, developing major environmental
problems, yet it may be effectively identified with electrochemical sensors. Lead (Pb)
and mercury (Hg) are poisonous heavy metals that harm aquatic life and human health
due to their highly toxic effects, bioaccumulation, and nondegradability. Herein, MOF
with L-Aspartic acid as a linker was prepared via microwave heating method to
investigate its potential for the electrochemical detection of Pb (II) and Hg (II) metal
ions. L-aspartic acid is naturally available and biocompatible. The synthesized MOF
with amino showed excellent surface properties. Using PEDOT: PSS increases the
conductivity of the composite and ferrites provide adsorption sites for HM capturing.
Therefore, the as-obtained PEDOT: PSS/MOF(Fe-LAA)@BiFeO3 exhibits a large no
of active sites, liable charge transfer, and high stability and conductivity, which results
in the enhanced sensitivity and stability for the electrochemical detection of HMIs. The
microwave heating method produced MOF with a uniform heating rate, low processing
time, low energy consumption, higher yield, and less environmental pollution. The
synthesized PEDOT: PSS/MOF(Fe-LAA)@BiFeO3 was characterized by XRD. The
electrochemical behavior PEDOT: PSS/MOF(Fe-LAA)@BiFeO3 was investigated
using cyclic voltammetry (CV). The Pb (II) and Hg (II) ions were identified by
differential pulse voltammetry (DPV) at pH 5. The limit of detection (LOD) for Pb (II)
and Hg (II) ions was 17.12ngL-1 and 3.78 ngL-1 respectively.
