| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Tran, Thi Tuyet Mai
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2023Erosion-corrosion of copper in cooling water systems at 60°C using an impinging liquid jet and Electrochemical Quartz Crystal Microbalance
- 2021Corrosion and hydrogen permeation in H2S environments with O2 contamination – Part 3: the impact of acetate-buffered test solution chemistrycitations
- 2020Impact of oxygen contamination on the electrochemical impedance spectroscopy of iron corrosion in H2S solutionscitations
- 2019Corrosion and hydrogen permeation of low alloy steel in H2S-containing environments : the effect of test buffer solution chemistry
- 2019EIS study of iron and steel corrosion in aqueous solutions at various concentrations of dissolved H2S : impact of oxygen contamination.
- 2019Corrosion and Hydrogen Permeation in H2S Environments with O2 Contamination, Part 2: Impact of H2S Partial Pressurecitations
- 2018Corrosion of Pure iron and Hydrogen Permeation in the Presence of H 2 S with O 2 contamination
- 2018Electrochemical study of oxygen impact on corrosion and hydrogen permeation of Armco iron in the presence of H 2 S
- 2017Impact of Oxygen on Corrosion and Hydrogen Permeation of Pure iron in the Presence of H2S
- 2016Facile and Green Synthesis of Polyoxometalate-Reduced Graphene Oxide Nanocomposite
- 2012Anomalous Dissolution of Copper in Al-Cu alloys
Places of action
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document
Facile and Green Synthesis of Polyoxometalate-Reduced Graphene Oxide Nanocomposite
Abstract
Nowadays numerous applications imply the use of graphene sheets which can notably be fabricated by chemical reduction of graphene oxide (GO). This method has the advantage of bulk quantity production however the chemical species generally used as reducing agent, such as hydrazine, are toxic and do not prevent the aggregation of the reduced GO (rGO) sheets in solution if no stabilizer is used. An alternative green method for producing stable rGO has been developed using polyoxometalates (POMs), anions which have redox properties. In this communication, we propose a new method which is based on the use of a Keggin-type POM, SiW12O404- (SiW12). First, these anions dissolved in pure water are electrochemically reduced by an electrolysis performed at a constant potential. Then the resulting solution is added to a GO suspension, at room temperature. Rapidly GO is reduced while the POMs are reoxidized and SiW12@rGO nanocomposites are formed. This method does not used toxic reagents and allows the preparation of a high amount of rGO sheets decorated with SiW12. This nanocomposite has been characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, TEM observations, thermogravimetric analyses and finally its electrochemical properties have been studied. The electrochemistry studies of the nanocomposites deposited on a glassy carbon electrode evidence the redox response of SiW12 anions (reduction/reoxidation). This finding confirms that the POMs are immobilized on rGO sheets leading to the nanocomposite SiW12@rGO. This was also confirmed by TEM observations which show the presence of particles of about 1 nm in diameter on the graphene sheets, size similar to the size of the Keggin clusters. The electrochemical studies evidence a high faradic current due to SiW12 which is superimposed to a capacitive current due to rGO. Therefore the nanohybrid materials prepared in the present work have many potential applications such as energy storage (supercapacitors).