Comparative Investigation of Activated Carbon Electrode and a Novel Activated Carbon/Graphene Oxide Composite Electrode for an Enhanced Capacitive Deionization
| Autor: | Philippe Sistat, Gbenro Folaranmi, François Zaviska, Marc Cretin, Mikhael Bechelany |
|---|---|
| Přispěvatelé: | Institut Européen des membranes (IEM), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Capacitive deionization Oxide chemistry.chemical_element 02 engineering and technology 010402 general chemistry Electrochemistry lcsh:Technology 7. Clean energy 01 natural sciences Article law.invention chemistry.chemical_compound Adsorption law medicine General Materials Science activated carbon lcsh:Microscopy lcsh:QC120-168.85 electro-sorption lcsh:QH201-278.5 lcsh:T Graphene [CHIM.MATE]Chemical Sciences/Material chemistry electrode 021001 nanoscience & nanotechnology 6. Clean water cyclic voltammetry 0104 chemical sciences chemistry Chemical engineering lcsh:TA1-2040 graphene oxide lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering Cyclic voltammetry lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 Carbon Activated carbon medicine.drug |
| Zdroj: | Materials Materials, MDPI, 2020, 13 (22), pp.5185. ⟨10.3390/ma13225185⟩ Volume 13 Issue 22 Materials, Vol 13, Iss 5185, p 5185 (2020) |
| ISSN: | 1996-1944 |
| Popis: | International audience; Capacitive deionization is an emerging brackish water desalination technology whose principle lies in the utilization of porous electrodes (activated carbon materials) to temporarily store ions. Improving the properties of carbon material used as electrodes have been the focus of recent research, as this is beneficial for overall efficiency of this technology. Herein, we have synthesized a composite of activated carbon/graphene oxide electrodes by using a simple blending process in order to improve the hydrophilic property of activated carbon. Graphene oxide (GO) of different weight ratios was blended with commercial Activated carbon (AC) and out of all the composites, AC/GO-15 (15 wt.% of GO) exhibited the best electrochemical and salt adsorption performance in all operating conditions. The as prepared AC and AC/GO-x (x = 5, 10, 15 and 20 wt.% of GO) were characterized by cyclic voltammetry and their physical properties were also studied. The salt adsorption capacity (SAC) of AC/GO-15 at an operating window of 1.0 V is 5.70 mg/g with an average salt adsorption rate (ASAR) of 0.34 mg/g/min at a 400 mg/L salt initial concentration and has a capacitance of 75 F/g in comparison to AC with 3.74 mg/g of SAC, ASAR of 0.23 mg/g/min and a capacitance of 56 F/g at the same condition. This approach could pave a new way to produce a highly hydrophilic carbon based electrode material in CDI. |
| Databáze: | OpenAIRE |
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