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Synthesis of New CuNPs–Decorated Anchored Type Ligands, Applications as a Non-Enzymatic Electrochemical Sensor for Hydrogen Peroxide, Ali A. Ensafi, Navid Zandi–Atashbar, M. Ghiaci, M. Tghizadeh, B. Rezaei,Material Sci. Eng. C, 2015, 47, 290-297

In thiswork, copper nanoparticles (CuNPs) decorated on twonewanchored type ligandswere utilized to prepare
two electrochemical sensors. These ligands are made frombondingamine chains to silica support including SiO2–
pro–NH2 (compound I) and SiO2–pro–NH–cyanuric–NH2 (compound II). The morphology of synthesized CuNPs
was characterized by transmission electron microscopy (TEM). The nano-particles were in the range of 13–37nm
with the average size of 23 nm. These materials were used to modify carbon paste electrode. Different electrochemical
techniques, including cyclic voltammetry, electrochemical impedance spectroscopy and hydrodynamic
chronoamperometry, were used to study the sensor behavior. These electrochemical sensors were used as a
model for non-enzymatic detection of hydrogen peroxide (H2O2). To evaluate the abilities of the modified electrodes
for H2O2 detection, the electrochemical signals were compared in the absence and presence of H2O2. From
them, twomodified electrodes showed significant responses vs. H2O2 addition. The amperograms illustrated that
the sensors were selective for H2O2 sensing with linear ranges of 5.14–1250 μmol L−1 and 1.14–1120 μmol L−1
with detection limits of 0.85 and 0.27 μmol L−1 H2O2, sensitivities of 3545 and 11,293 μA mmol−1 L and with response
times less than 5 s for I/CPE and II/CPE, respectively. As further verification of the selected sensor, H2O2
contained in milk sample was analyzed and the obtained results were comparable with the ones from classical
control titration method.

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