Effect of Poly(N-vinyl-pyrrolidone) on Electrochemical Production of Cu Nanoparticles

Abstract

Cu nanoparticles were synthesized via electrochemical deposition and the effect of the addition of poly(N-vinyl-pyrrolidone) (PVP) and pH on the properties of the nanoparticles was investigated. The Cu nanoparticles were prepared from an electrolyte containing copper acetate (pH 5.50) or copper sulfate (pH 4.14) by collecting the dispersed particles in the solution after electrochemical reduction. With the use of the acetate bath, formation of Cu 2 O at −0.2 and −1.5 V vs. Ag/AgCl was confirmed. On the other hand, Cu 2 O formation was not observed with the sulfate bath due to the lower pH, and the Cu nanoparticles could not be obtained at the potential of −1.5 V vs. Ag/AgCl. Surface enhanced Raman spectroscopy with plasmon sensors was used to investigate the transformations of PVP during electrolysis under the different conditions when Cu particles were and were not formed. For the dispersed nanoparticles in the electrolyte, it was observed that the C=O and C-N peaks of PVP also exhibited a red-shift. It was thus confirmed that PVP was coordinated to both the cathode electrode and dispersed nanoparticles in the electrolyte upon electrochemical reduction.

Simple and Fast Determination of Piroxicam in Pharmaceutical and Real Samples Using Glassy Carbon Electrode Modified with Copper Nano-particles

“…Synthesis of CuNPs is relatively uncomplicated and there is some reported methods for their synthesis. [33][34][35][36][37][38] The chemical reduction of copper ions in aqueous solution between these reported methods is probably the most popular route. The modification of GCE with copper nanoparticles or with nanocomposite was reported in some articles.…”

Fabrication of a Micro-Needle Sensor Based on Copper Microspheres and Polyaniline Film for Nitrate Determination in Coastal River Waters

“…[19][20][21] Recently, scientists have made many efforts directing towards the synthesis of Cu micro-nanostructures, such as nanoparticles, nanoplates, nanoflowers, nanorods/wires, nanoribbons, micro-dandelions, hollow spheres, spindles, nanofilms, and hierarchical nanostructures, and many of them were examined for sensing applications. [22][23][24][25][26][27] As to our knowledge, copper microspheres (CuMSs) modified micro-needle electrode for NO − 3 detection has ever been reported previously. However, considering the smooth surface of stainless steel needle, CuMSs are not easy to be modified on the bare MNE.…”