Electrochemical Synthesis of ZnO Nanoparticles During Anodic Dissolution of Zinc in Alcohols Solvents

Stypuła, B.; Starowicz, M.; Hajos, M.; Olejnik, E.

doi:10.2478/v10172-011-0032-x

Cited by 11 publications

(5 citation statements)

References 21 publications

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“…The density of the anodic current increases in this region with the rise of concentration of chloride anions. The fractional order of reaction in relation to chloride anions [17] confirms that apart from Clanions it is also the solvent that takes part in an anodic dissolution process. Zn polarization curves in the propanol solution ( Fig.…”

Section: Methodology Of Investigationsmentioning

confidence: 63%

“…There are two characteristic sections visible on the curves which confirm the two-phase course of the anodic process. There is the first low anodic potential region and the second steep oneabove -1.0 V. Intensive dissolution of zinc in the form of complexes [Zn(A) x OR) y ] 2occurs in the second section [15,17]. The density of the anodic current increases in this region with the rise of concentration of chloride anions.…”

Section: Methodology Of Investigationsmentioning

confidence: 99%

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Morphology and Structure of ZnO Nanoparticles Produced by Electrochemical Method

Stypuła

Kmita

Hajos

2014

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This article presents studies of the morphology and structure of ZnO nanoparticles synthesized by the electrochemical method. Colloidal solutions of the nanoparticles are obtained by an anodic dissolution of metallic zinc in alcohol solutions of lithium chloride containing a small amount of water (5 % vol.). The parameters chosen for the synthesis are based on Zn polarization curves(obtained using the the potentiokinetic (Linear Sweep Voltammetry-LSV) and the chronoamperometric method. The synthesis of zinc oxide nanoparticles is carried out in 0.05m LiCl + 5 % H 2 O alcohol (methanol or propanol) solutions during galvanostatic polarization of Zn at 3 mA/cm 2 current density. The process is performed in a two-electrode system, where both electrodes (the working anode and cathode) are made of zinc. Optical properties, morphology and structure of the colloidal solutions and powders (obtained after evaporating the solvent) were studied using the following spectroscopic and microscopic techniques: UltraViolet and Visible Spectroscopy (UV-VIS), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM).

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Section: Methodology Of Investigationsmentioning

confidence: 63%

Section: Methodology Of Investigationsmentioning

confidence: 99%

Morphology and Structure of ZnO Nanoparticles Produced by Electrochemical Method

Stypuła

Kmita

Hajos

2014

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“…Other experimental current density curves are reported in references. 26,[28][29][30][31][32][33][34][35] In Fig. 5d, the experimental curve of current density versus time in an oxygen reduction reaction, which was reported by Bergel et al 17 among several supporting data, 17,[36][37][38][39][40] is compared with the theoretical calculations to illustrate the electrochemical theory.…”

Section: Comparison Results Of Polarizationmentioning

confidence: 98%

Kinetics of Polarization Mechanisms

Roh

2013

J. Electrochem. Soc.

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Polarization is a primary application process in electrochemical reactions. We have proposed a statistical thermodynamic theory for electrochemical reactions which is essential to investigate non-equilibrium, quasi-equilibrium, and equilibrium electrochemical reaction processes. We here apply the electrochemical reaction theory to understand the detailed non-equilibrium kinetics of polarization in electrochemical reactions. The unified approach demonstrates the current density as a function of electric potential, time, and space so that the theory leads to a new paradigm for polarization in electrochemical reactions. Three variable separation constants represent particle number constants and play the major roles in exploring the distinct polarization mechanisms. The kinetic theory accounts for the four control mechanisms of activation, concentration, resistance, and film polarization. Three limiting current densities and four activation potentials are adopted as input parameters. Theoretical calculations agree with existing experimental data in a wide range of electric potential including the four control regimes of polarization.

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“…Therefore, to create materials with definite predetermined characteristics and controlled properties, it is necessary to develop more efficient approaches for preparing dispersed oxides with a certain range of dimensions and  properties. One such alternative technique is the electrochemical generation of ceramic precursors, based on the anodic dissolution [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical synthesis of nanosized iron oxide–alumina system

et al. 2016

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An electrochemical method for the synthesis of complex dispersed oxide system Al 2 O 3-Fe 2 O 3 , based on the combined aluminum and iron anodic dissolution in aqueous solution containing chloride ions, has been suggested. The phase composition and morphology of Al 2 O 3-Fe 2 O 3 dispersed precipitate have been investigated by means of X-ray fluorescence, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The influence of the electrolysis mode on the characteristics of the synthesized oxide system has been shown. It is found that the direct current (DC) mode allows us to adjust the phase correlation in the precipitate and to obtain a particle size which is two or more times smaller than the particle size of the samples synthesized by means of the alternating current (AC).

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Electrochemical Synthesis of ZnO Nanoparticles During Anodic Dissolution of Zinc in Alcohols Solvents

Cited by 11 publications

References 21 publications

Morphology and Structure of ZnO Nanoparticles Produced by Electrochemical Method

Morphology and Structure of ZnO Nanoparticles Produced by Electrochemical Method

Kinetics of Polarization Mechanisms

Electrochemical synthesis of nanosized iron oxide–alumina system

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