Substituent and Solvent Effects on the Electrochemical Oxidation of para- and meta-Substituted Anilines

2006 ◽  
Vol 61 (10) ◽  
pp. 1254-1260 ◽  
Author(s):  
Durvas S. Bhuvaneshwari ◽  
Kuppanagounder P. Elango
Keyword(s):  
Electrochemical Oxidation ◽  
Supporting Electrolyte ◽  
Oxidation Potential ◽  
Negative Reaction ◽  
Excellent Correlation ◽  
Multiple Correlation ◽  
Substituted Anilines ◽  
Multiple Correlation Analysis ◽  
Substituent Constants ◽  
Reaction Constants

Electrochemical oxidation of fifteen para- and meta-substituted anilines in different mole fractions of acetic acid in water has been investigated in the presence of 0.1 M sulphuric acid as supporting electrolyte. The oxidation potential data of anilines correlates well with Hammett’s and Brown- Okamoto’s substituent constants affording negative reaction constants. The effect of para- and metasubstituents on the oxidation potential conforms to Swain’s F and R parameters, affording negative reaction constants. The oxidation potential values correlate well with macroscopic solvent parameters such as relative permittivity, εr, and polarity, ETN. Multiple correlation analysis also shows an excellent correlation with the oxidation potential values.

Elektrochemische Eigenschaften von Dihydropyridin-und Pyridinderivaten / Electrochemical Properties of Pyridine and Dihydropyridine Derivatives

1981 ◽  
Vol 36 (3) ◽  
pp. 386-390 ◽  
Author(s):  
G. Abou-Elenien ◽  
J. Rieser ◽  
N. Ismail ◽  
K. Wallenfels
Keyword(s):  
Electrochemical Properties ◽  
Electrochemical Oxidation ◽  
Supporting Electrolyte ◽  
Aqueous Solvent ◽  
Dihydropyridine Derivatives

AbstractThe electrochemical oxidation and reduction properties of different dihydropyridines and pyridines have been investigated in non aqueous solvent as benzonitrile and aceto-nitrile with tetra-n-butylammonium perchlorate as supporting electrolyte at platinium electrodes using DC-voltametry, cycl. voltametry and coulometry. Possible redox-mechanisms are discussed.

scholarly journals HUBUNGAN PENDIDIKAN KEWIRAUSAHAAN DAN MINAT BERWIRAUSAHA TERHADAP SIKAP KEWIRAUSAHAAN MAHASISWA FAKULTAS EKONOMI UNIVERSITAS NEGERI MAKASSAR

2018 ◽  
Vol 1 (2) ◽  
pp. 38
Author(s):  
Nilam Cahya Syahruddin ◽  
Muhammad Azis ◽  
Inanna Inanna
Keyword(s):  
Data Analysis ◽  
Entrepreneurship Education ◽  
State University ◽  
Multiple Correlation ◽  
Analysis Techniques ◽  
Entrepreneurial Attitudes ◽  
Normality Test ◽  
Multiple Correlation Analysis ◽  
Linearity Test ◽  
Economic Faculty

The purpose of this study was to find out the description of entrepreneurship education and entrepreneurial interest in Economic Faculty students of Makassar State University a partially and simultaneously. Data collection techniques are carried out through questionnaire techniques and documentation. Data analysis techniques are Normality Test, Linearity Test, Multiple Correlation  Analysis, Bivariate, and F Test. The results showed that partially and simultaneously entrepreneurship education and entrepreneurial interest have a significant relationship to the entrepreneurial attitudes of students of the Economic Faculty of Makassar State University

scholarly journals Electrochemical oxidation of m-cresol purple dye in aqueous media

2015 ◽  
Vol 50 (4) ◽  
pp. 305-313
Author(s):  
Sajjad Khezrianjoo ◽  
Hosakere Doddarevanna Revanasiddappa
Keyword(s):  
Electrochemical Oxidation ◽  
Applied Voltage ◽  
Supporting Electrolyte ◽  
Aqueous Media ◽  
Degradation Process ◽  
Cell System ◽  
Electrolysis Cell ◽  
System A ◽  
Initial Ph ◽  
Indicator Dye

The present investigation showed that the indicator dye m-cresol purple (mCP) was degraded in a laboratory scale, undivided electrolysis cell system. A platinum anode was used for generation of chlorine in the dye solution. The influence of supporting electrolyte, applied voltage, pH, initial dye concentration and temperature were studied. The ultraviolet-visible spectra of samples during the electrochemical oxidation showed rapid decolorization of the dye solution. During the electrochemical degradation process, dye concentration and current were measured to evaluate the energy consumption and current efficiency. After 10 minutes of electrolysis, a solution containing 20 mg/L mCP showed complete color removal at a supporting electrolyte concentration of 1 g/L NaCl, initial pH 6.7, temperature 25 °C and applied voltage 5 V; however, when pH was kept at 6.7, a higher rate constant was observed. There was good fit of the data to pseudo-first-order kinetics for dye removal in all experiments. Dependence of the decolorization rate on the initial mCP concentration can be described as roα[mCP]o−0.98. The apparent activation energy for the electrochemical decolorization of mCP was determined to be −6.29 kJ/mol.

Electrochemical Oxidation of Azo Dye Wastewater Using Graphene-Based Electrode Materials

2019 ◽  
Vol 19 (11) ◽  
pp. 7308-7314
Author(s):  
Jinyan Li ◽  
Qingsong Guan ◽  
Junming Hong ◽  
Chang-Tang Chang
Keyword(s):  
Electrochemical Oxidation ◽  
Current Density ◽  
Electrode Materials ◽  
Supporting Electrolyte ◽  
Performance Comparison ◽  
Carbon Cloth ◽  
Reactive Black 5 ◽  
Dye Wastewater ◽  
Composite Electrodes ◽  
Initial Concentration

Composite electrodes with different graphene (GN)/TiO2 ratios and nano-activated carbon electrodes were prepared for electrocatalytic performance comparison. The electrodes were loaded with platinum (Pt) by use of chloroplatinic acid to promote their performance. Reactive Black 5 (RBk5) dye wastewater was treated as a challenging pollutant by use of advanced electrochemical oxidation technology. The composite materials were characterized by Transmission Electron Microscope (TEM), Field Emission Scanning Electron Microscopy (FE-SEM), and Energy Disperse Spectroscopy (EDS). Results showed that the graphene electrode was prepared successfully and verified because all elements were uniformly loaded on the conductive carbon cloth. The effects of several operating parameters including material types, pH, initial concentration of RBk5, and current density on the removal performance of RBk5 were also assessed. The supporting electrolyte was NaCl solution of 1 g L−1. The concentration of RBk5 was detected using an ultraviolet spectrophotometer with a detection wavelength of 600 nm. The optimum parameters of the experiment were GN/TiO2 ratio of 1:4 and pH of 6.6. The removal efficiency of RBk5 could be higher than 95% under an initial concentration of RBk5 of 5 ppm and a current density of 2.5 mA·cm-2 when reaction time was 30 min.

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