One-Step Electrodeposition of Polypyrrole-Copper Nano Particles for H₂O₂Detection

Abstract

A straightforward and novel one-step technique for electrochemical synthesis of polypyrrole micro trunk-like shape decorated with copper nanoparticles (PpyMTs-CuNPs) is presented. The technique is based on electropolymerization and copper electrodeposition in the one-pot aqueous solution. The electrodeposited CuNPs with 30 nm in diameter have embedded on the polypyrrole micro trunk-like (PpyMTs). The synthesized PpyMTs-CuNPs were characterized by field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XRD) and electrochemical methods. The chemical structures, morphology, catalytic and electrochemical properties of the synthesized PpyMTs-CuNPs toward H 2 O 2 were examined. The prepared PpyMTs−CuNPs increased electrocatalytic activity toward reduction of hydrogen peroxide (H 2 O 2 ) and can be employed as an inexpensive and novel sensor for determination of H 2 O 2 . The initial linear part was observed ranging from 0.2 mM to 1 mM with a limit of detection of 0.9 μm and the next linear part increased to 110 mM, having a limit of detection of 4.39 μm (S/N of 3). Additionally, the sensor exhibited remarkable reproducibility, stability and selectivity that make PpyMTs-CuNPs a good nonenzymatic H 2 O 2 sensor.

Conducting Polymer Based Nanobiosensors

“…The sensor consisting of Ag NSBs-PPy has a rapid amperometric response time of less than 5 s, and its MDL was estimated to be 0.68 μ·mol·L −1 . Nia et al [ 19 ] also demonstrated H 2 O 2 detection using PPy-coated copper NPs. Interestingly, they proposed electropolymerization and copper electrodeposition in a one-pot aqueous solution for preparing PPy micro trucks with CuNPs (PPyMTs-CuNPs).…”

Fabrication of Non-Enzymatic Electrochemical Hydrogen Peroxide Sensor Based on Ag NPs/Co3O4/ERGO Composite

“…13 Up to now, various metal nanoparticlegraphene oxide have been reported as the base for sensor fabrication, including the Ag/RGO 13 NiO Nanosheets/Carboxyl-Terminated RGO, 14 ZnO/RGO, 15 Ag nanodendrites/ N-graphene, 16 Au/MnO 2 / ERGO, 17 Pd Nanospheres/RGO, 18 Pt-Ag/RGO, 19 IL/RGO/Ni-Pd, 20 PdAg/RGO, 21 ZnO/GS, 22 Ag/graphene, 23 and PpyMTs-CuNPs. 24 Metal oxides show excellent electrochemical behaviors leading to a number of interesting applications. 25 Among these oxides, cobalt oxides nanostructures are important magnetic materials.…”

Evaluating the Practical Use of Digital Video to Study the Effect of Sheet Resistance of Transparent Indium-Tin Oxide Electrodes Using the Galvanostatic Deposition of Poly(o-toluidine)

“…[7][8][9] Among all instrumental techniques, CPs on several kinds of conducting substrates have been preferably deposited by electrochemical polymerization due to their simplicity 10 allowing the film thickness to be easily controlled. 11,12 The synthesis and deposition of CPs on any conducting substrate is of paramount importance to obtain the highest operational stability of the modified electrode. 13 Assuming that CPs are homogeneously deposited on the electrode surface, [14][15][16] spectroelectrochemistry, the combination of electrochemical and spectroscopic techniques, analyzes the electrochromic changes of CPs in a limited region by the light beam cross-section (few mm 2 ), and after, the results are extrapolated to the complete surface.…”