| 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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Silva, Amt
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2023Pd and Pd-Cu supported on different carbon materials and immobilized as flow-through catalytic membranes for the chemical reduction of NO3-, NO-2 and BrO3- in drinking water treatmentcitations
- 2017Comparison of self-standing and supported graphene oxide membranes prepared by simple filtration: Gas and vapor separation, pore structure and stabilitycitations
- 2016Reduced graphene oxide catalysts for efficient regeneration of cobalt-based redox electrolytes in dye-sensitized solar cellscitations
- 2015Synergistic effect between carbon nanomaterials and ZnO for photocatalytic water decontaminationcitations
- 2014Pore structure, interface properties and photocatalytic efficiency of hydration/dehydration derived TiO2/CNT compositescitations
- 2014Azo-dye orange II degradation by the heterogeneous Fenton-like process using a zeolite Y-Fe catalyst-Kinetics with a model based on the Fermi's equationcitations
- 2014Controlled surface functionalization of multiwall carbon nanotubes by HNO3 hydrothermal oxidationcitations
- 2013CERAMIC MEMBRANES IN HYBRID PHOTOCATALYSIS/ULTRAFILTRATION PROCESSES
- 2012Insights into UV-TiO2 photocatalytic degradation of PCE for air decontamination systemscitations
- 2012Preparation of carbon aerogel supported platinum catalysts for the selective hydrogenation of cinnamaldehydecitations
- 2012Advanced nanostructured photocatalysts based on reduced graphene oxide-TiO2 composites for degradation of diphenhydramine pharmaceutical and methyl orange dyecitations
- 2011Carbon nanotube-TiO2 thin films for photocatalytic applicationscitations
Places of action
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article
Comparison of self-standing and supported graphene oxide membranes prepared by simple filtration: Gas and vapor separation, pore structure and stability
Abstract
A large series of self-standing and supported graphene oxide (GO) membranes were prepared via a facile synthetic approach involving the filtration of GO suspensions through polymeric and ceramic macro porous filters. Our overall aim was to develop a membrane that would be almost impermeable to helium and hydrogen, exhibiting in parallel very high water vapor and moderate alcohol vapor permeability, properties that constitute this type of membranes very promising for pervaporation and gas separation applications. Several of the derived self-standing membranes, especially those developed using aqueous GO suspensions of low concentration in GO, have met the above mentioned requirements. In particular, the development of highly efficient GO membranes using suspensions of low concentration (<= 1.0 g/L in order to achieve individual GO flakes rather than GO stacks) and of high volume (> 50 mL to avoid very thin membranes which in turn incorporate defects) is straightforward and independent of the filtration rate, while slow filtration rates lead to better results when employing higher GO concentrations (1.5 g/L), but never to a membrane with purely molecular sieving characteristics. Small-angle X-ray scattering (SAXS) measurements indicated better GO's sheet packing and, thus, smaller pore size/network available for gas diffusion in membranes with smoother surfaces. In addition, the in-plane distance between adjacent GO sheets (especially on the outermost layer of the membrane), and also the size of GO stacks, were found to have more impact on the performance of the membranes than the respective d-distance determined by X-ray diffraction (XRD). Overall, a self-standing membrane developed by using anodised alumina (AAO) filter exhibited exceptional stability coupled with an excellent water vapor flux and water/alcohol selectivity.