Comparative study of GO and reduced GO coated graphite electrodes for decolorization of acidic and basic dyes from aqueous solutions through heterogeneous electro-Fenton process
| Autor: | Abdollah Gholami Akerdi, Mokhtar Arami, Zahra Es’haghzade, S.H. Bahrami |
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| Rok vydání: | 2017 |
| Předmět: |
Aqueous solution
Materials science Graphene Process Chemistry and Technology Inorganic chemistry Oxide Nanoparticle 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Pollution 0104 chemical sciences law.invention Catalysis chemistry.chemical_compound chemistry law Chemical Engineering (miscellaneous) Cyclic voltammetry 0210 nano-technology Waste Management and Disposal |
| Zdroj: | Journal of Environmental Chemical Engineering. 5:2313-2324 |
| ISSN: | 2213-3437 |
| DOI: | 10.1016/j.jece.2017.04.028 |
| Popis: | In the present study, decolorization of two different dyes was enhanced by a simple heterogeneous Electro-Fenton degradation. Electro-Fenton removal was carried out using modified graphite electrodes (GE). Graphene oxide (GO) and reduced graphene oxide (rGO) were successfully synthesized to deposite on the surface of GE. Fe 3 O 4 nanoparticle was produced as catalyst to generate Fe +3 Fe 2+ ions leading to produce high reactive agents, H 2 O 2 and OH . Na 2 SO 4 was used as electrolyte to enhance current value in the solution. Effect of the modified cathode (GO-GE and rGO-GE) and also operating factors such as magnetic loading, electric current, pH and dye concentration on dyes degradation were examined. In addition, cyclic voltammetry (CV) was used to characterize electrochemical properties of modified cathodes in degradation capacity of Methylene Blue (MB) and Acid Red 14 (AR14). The experimental result indicated that magnetic supported reaction is effective in removing dye molecules in both acidic and alkaline pH. In some cases it was shown that electric current and Fe 3 O 4 concentrations have optimum value. CV diagrams confirmed the experimental results and better electrochemical properties of rGO-GE to degrade dyes. CV measurements were in accordance with experiments that MB are more recalcitrant to degrade rather than AR14. |
| Databáze: | OpenAIRE |
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