| 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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Dumée, Ludo
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Publications (9/9 displayed)
- 2019Wrinkled silica doped electrospun nano-fiber membranes with engineered roughness for advanced aerosol air filtrationcitations
- 2019Catalytic electrospun nano-composite membranes for virus capture and remediationcitations
- 2019One-pot synthesis of catalytic molybdenum based nanocomposite nano-fiber membranes for aerosol air remediationcitations
- 2019Mixed matrix Poly(vinyl alcohol)-Copper nanofibrous anti-microbial air-microfilterscitations
- 2018The growth of high density network of MOF nano-crystals across macroporous metal substrates - solvothermal synthesis versus rapid thermal depositioncitations
- 2017Inorganic nanoparticles/MOFs hybrid membrane reactors for CO2 separation and conversion
- 2016Exploring plasma technique for tuning surface energy of thin film composite membranes
- 2016Enhanced visible light absorption of titania nanotubes vie non-metal atom RF plasma doping
- 2016Assessing temporal and physical stability of functional groups introduced by surface plasma treatments across the outer shells of carbon nanotubes
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document
Enhanced visible light absorption of titania nanotubes vie non-metal atom RF plasma doping
Abstract
Over the last decades titania has been captivating the attention of the scientific world as an efficient photocatalytic material, however the slight absorbance in the visible light range represents a technical limitation and a drawback for energy cost since an UV-light source is necessary to take advantage of this property. Consequently, a significant enhancement in visible light absorbtion is highly desirable and studies have been carried out on the possibility of doping titania with transition metal cations to narrow the band-gap of this semiconductor, determining however an increase in thermal instability and a decrease in carrier lifetime, along with extra costs in terms of metal dope and its implantation protocol. Here, an alternative, cost-effective and green route to the typical metal doping is presented, resulting in a consistent shift towards the visible light absorption: anodized titania substrates as flat sheets are treated on a radio frequency (RF) plasma rig with ammonia and carbon dioxyde as a feed gas. The introduction of N and C atoms in the structure, creating non-metal-Ti bonds, has been showed to significantly enhance the photocatalytic activity in the visible light region leading to an efficient protocol for industrial applications. Plasma parameters such as pressure, power and exposure-time have been optimized to control the degree of functionalization, which was eventually assessed via X-ray Photoelectron Spectroscopy (XPS),Energy-Dispersive X-ray Spectroscopy (EDS), Photo-Electron Spectroscopy in Air (PESA) whilst the possibility of replacing amorphous titania with crystalline anatase during the plasma treatment was evaluated via X-ray Diffraction (XRD). The UV-visible light absorption finally demonstrated that a significant increase in the visible light region can be obtained by this protocol opening the way to an enhanced photocatalytic efficiency and to a further development of this promising technique.