Many studies have been conducted using electrochemical impedance spectroscopy (EIS) in recent decades. This is an accurate detection technique for electrochemical systems based on transmission function analysis between voltage and current. In this research, impedance, admittance, and capacitance of composite graphite electrode are investigated and compared in Mn and Fe ions solutions in sulfuric acid medium. The results indicated lower Fe impedance than Mn and admittance greater than that of Mn, indicating a greater Fe conductivity than Mn. Additionally, higher capacitance of Fe than of Mn was because of higher electric characteristics of Fe as compared to Mn. These techniques have been an alternative for cyclic voltammogram (CV) and mainly help in the quantitative determination of kinetic and transmission parameters. Valuable data are obtained using Electrochemical impedance spectroscopy (EIS). Therefore, it can be concluded that EIS is a detecting technique for describing and evaluating the behavior of intermediary elements at the surface of electrode/electrolyte. Manuscript profile

Electrosynthesis of zinc sulfide nanoparticles doped with copper and chlorine has been investigated in this study. For the electrosynthesis of ZnS, a constant current pulse of 200 mA cm-2 was applied to zinc nitrate and sodium thiosulfate solution containing 1 M hydrochloric acid in an electrochemical cell. The thin film of zinc sulfide nanoparticles was placed on a graphite electrode. For doping Cl- and Cu+ on ZnS, the modified electrode was placed in copper sulfate solution containing 0.1 M potassium chlorate under a constant potential of -0.9 V for 3 minutes. By changing the concentration of potassium chlorate from 0.1 to 0.01 and 0.0001 M, the amount of doped Cl was variable, therefore; nanoparticles with different luminescence properties were achieved. Based on the X-ray diffraction pattern average crystallite size for nanocomposites is the same and about 34-64 nm. Using scanning electron microscopy imaging it was observed that synthesized nanocomposites have appropriate uniformity. Characterization was performed using XRD and FT-IR methods. The morphology and luminescence properties of these nanoparticles were studied using SEM and UV-Visible. Manuscript profile

This study is in investigated the antioxidant effects of polypyrrole and grapheme nanocomposite on 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical and Ferric reduction activity potential (FRAP). The electrosynthesis of this nanocomposite on the tip of a graphite pencil by cyclic voltammetry (CV) in the potential range -0.4 to 1.2V at the 5 mL of phosphoric acid (H3PO4), in the presence of potassium chloride (KCl) electrolyte supplements as an inorganic salt and p-Toluene sulfonic acid (pTSA) as an organic salt was performed. Antioxidant capacity was determined using Uv-vis spectroscopy. Also, FT-IR Spectroscopy and scanning electron microscopy (FESEM) were used to study the surface structure and topography of nanocomposite.Polypyrrole-graphene nanocomposite has antioxidant properties and increases the absorption rate at FRAP = λmax596 nm by reducing iron ions and reducing the absorption rate in DPPH = λmax516 nm by the transition of electrons and destroying DPPH free radicals. Also, this nanocomposite in the presence of p-Toluene sulfonic acid has a higher antioxidant capacity than the presence of potassium chloride. Manuscript profile

In this research, homo and copolymer electrosynthesis of Aniline/Pyrrole changed into performed at the tip of a graphite pencil in phosphoric acid containing KCl as electrolyte support. The ability of electro-synthesized homo and copolymers to reduce Fe3+ turned into compared and evaluated. Fe is a ferromagnetic material that exhibits magnetic properties in the absence of a magnetic field. Fe+3 ions are very pale due to the unauthorized mutation of the electrons, and with the reduction and conversion to Fe+2, there is a permissive electron mutation, which means that the chelates are rapidly attached to the authorized ligands and increase the color Fe (III), as an oxidant, tends towards the antioxidants found in the sample and makes contact with them and turns electrons into Fe (II) and tripyridyltriazine (TPTZ) is an electron binder in which by the electron donor antioxidant. The consequences show that the poly-aniline decreasing assets are better than the copolymer and that the copolymer is higher than the polypyrrole. The FTIR and UV-visible spectra indicated that the aniline ring increase in the polymer chain escalated the reduction. The structure and morphology of the homo and copolymer have been confirmed by SEM and FTIR. Manuscript profile