References of "Cloots, Rudi"
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See detailSpray-drying synthesis of Na3V2(PO4)2F3 as cathode material for Li/Na ion batteries
Eshraghi, Nicolas ULg; Caes, Sébastien ULg; Cloots, Rudi ULg et al

Poster (2015, May 08)

In this communication, Na3V2(PO4)2F3 (NVPF) powder with a NASICON-type structure is synthesized for the first time by spray-drying method. The effects of molar ratio of precursors, inlet temperature and ... [more ▼]

In this communication, Na3V2(PO4)2F3 (NVPF) powder with a NASICON-type structure is synthesized for the first time by spray-drying method. The effects of molar ratio of precursors, inlet temperature and heat treatment temperature on the powder purity and particle morphology were investigated. Structural and microstructural characterizations were carried out by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Best electrochemical properties, from specific capacities of 94 mAh .g-1 at C/15 to 80 mAh.g-1 at 1C in li-ion batteries, were obtained for powders dried at 180°C and fired at 600°C. These preliminary results show that spray-drying technique is suitable for obtaining complex powders with a very good homogeneity leading to very good electrochemical properties. [less ▲]

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See detailSurface treatments for electrochromic glazing: toward reduced costs and optimal performances through ultrasonic spray pyrolysis
Maho, Anthony ULg; Denayer, Jessica; Bister, Geoffroy et al

Conference (2015, May)

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See detailDeposition of electrochromic oxide films by surfactant-assisted ultrasonic spray pyrolysis
Maho, Anthony ULg; Denayer, Jessica; Bister, Geoffroy et al

Conference (2015, May)

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See detailMagnetic shielding performances of YBa2Cu3O7−δ -coated silver tubes obtained by electrophoretic deposition
Devendra Kumar, N; Closset, Raphaël ULg; Wera, Laurent ULg et al

in Superconductor Science and Technology (2015), 28

We report a complete procedure to achieve multilayer YBCO thick films by electrophoretic deposition on silver tubes using a suspension of YBCO powder in butanol. With the aim to optimize the magnetic ... [more ▼]

We report a complete procedure to achieve multilayer YBCO thick films by electrophoretic deposition on silver tubes using a suspension of YBCO powder in butanol. With the aim to optimize the magnetic shielding performances of the coatings, we have carried out an extensive investigation of the influence of the deposition parameters, the multilayer deposition sequence and the intermediate/final heat treatments on the coating microstructure. Using the optimized conditions, a 24-layer YBCO coating has been successfully prepared on an 80 mm long Ag tube: the melt growth processed multilayered YBCO thick film thus obtained can shield an applied magnetic field of 1.9 mT at 77 K, the highest value per thickness unit reported so far in the literature for these materials. [less ▲]

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See detailPorous functional materials for energy applications
Colson, Pierre ULg; Dewalque, Jennifer ULg; Maho, Anthony ULg et al

Conference (2015)

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See detailProtein-calcium phosphate nanocomposites: Benchmarking protein loading via physical and chemical modifications against co-precipitation
Ozhukil Kollath, Vinayaraj ULg; Mullens, Steven; Luyten, Jan et al

in RSC Advances (2015), 5

The low protein loading capacity of commercially available calcium phosphate (CaP) is a major impediment in effectively using this inorganic material as a protein carrier despite its recognized ... [more ▼]

The low protein loading capacity of commercially available calcium phosphate (CaP) is a major impediment in effectively using this inorganic material as a protein carrier despite its recognized biocompatibility. In this study, nanocomposites of CaP and BSA were prepared by carefully designed precipitation methods in aqueous media. In the first co-precipitation method (CaP-BSA-1), calcium and phosphate precursors were simultaneously added to the protein solution matrix and in the second method (CaP-BSA-2) the protein solution was added after the reaction of the precursors. Crystallinity and phase composition of the resulting powders were determined using X-ray diffraction technique. Qualitative confirmation of presence of BSA on the nanocomposites, was obtained using mass spectrometry, ATR-FTIR and XPS. The results from desorption and thermogravimetric measurements indicated that BSA was trapped inside the cavities in the case of CaP-BSA- 1 whereas it was mostly surface adsorbed in the case of CaP-BSA-2. Protein loading capacity of these composites was compared with various physical and chemical surface modification strategies used on commercially available calcium phosphate powders. Nanocomposite particulates were found to have about 275 % higher protein loading capacity as compared to a commercial CaP powder with same surface area. Overall, this study benchmarks the different techniques used for protein loading enhancement on inorganic materials. [less ▲]

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See detailElucidating the opto-electrical properties of solid and hollow titania scattering layers for improvement of dye-sensitized solar cells
Thalluri, Venkata Visveswara Gopala Kris; Henrist, Catherine ULg; Spronck, Gilles ULg et al

in Thin Solid Films (2015)

The light scattering method has been adapted in dye-sensitized solar cells (DSCs) for optical absorption enhancement. In DSC's, particle-size of TiO2 should be inline with the scattering wavelength range ... [more ▼]

The light scattering method has been adapted in dye-sensitized solar cells (DSCs) for optical absorption enhancement. In DSC's, particle-size of TiO2 should be inline with the scattering wavelength range. Scattering particles can be used either by forming a bilayer structure with TiO2 nanocrystalline film or into the bulk of TiO2 nanocrystalline film. For improving the DSCs performances these scattering layers aim to refract/reflect the incident light by extending the traveling distance of UV-Visible/near-IR light within the dye-sensitized TiO2 nanocrystalline film. In this work, the scattering layers with two different particle-sizes (~200 nm-solid and ~400 nm-hollow) were deposited as an additional layer on the top of dye-sensitized TiO2 nanocrystalline film and the morphological properties were studied. By using various opto-electrical characterization techniques, the influence of these scattering layers for two different classes of DSCs prepared from N3 (UV-Vis) and SQ2 (near-IR) dyes were investigated. [less ▲]

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See detailMicrowave sintering of Ge-doped In2O3 thermoelectric ceramics prepared by slip casting process
Combe, Emmanuel ULg; Guilmeau, Emmanuel; Savary, E et al

in Journal of the European Ceramic Society (2015), 35

Ge doped In2O3 bulks were prepared by dry uniaxial compaction or slip casting shaping methods followed by a conventional or microwave sintering. Density of slip casted Ge doped In2O3 samples after ... [more ▼]

Ge doped In2O3 bulks were prepared by dry uniaxial compaction or slip casting shaping methods followed by a conventional or microwave sintering. Density of slip casted Ge doped In2O3 samples after conventional sintering reaches bulk density close to the theoretical one thanks to an optimized particles arrangement in the slip casted green bulks. Combined with a fast microwave sintering, slip casted bulks possess submicrometer grain size due to limited grain growth. A significant decrease of the electrical resistivity has been measured in slip casted samples sintered by conventional heat treatment. In bulk specimens sintered by microwave heating, a simultaneous increase of electrical resistivity and decrease of the thermal conductivity is observed. From room temperature to 1000 K in air, slip casted samples sintered by conventional or microwave sintering exhibit similar thermoelectric figure of merit (ZT) values. [less ▲]

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See detailUn assemblage épitaxique… d’hématite sur rutile.
Warin; Robert, A; Hatert, Frédéric ULg et al

in Le Règne Minéral (2015), 124

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See detailComparison of structural features of spin-coated and USP-deposited templated α-Fe2O3films
Toussaint, Caroline ULg; Chatzikyriakou, Daphne; Cloots, Rudi ULg et al

Poster (2015)

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See detailAtmospheric Pressure Plasma as an Activation Step for Improving Protein Adsorption on Hydroxyapatite Powder
Ozhukil Kollath, Vinayaraj ULg; Put, Sofie; Mullens, Steven et al

in Plasma Processes and Polymers (2015)

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See detailCombining mesoporosity and Ti-doping in hematite films for water splitting
Toussaint, Caroline ULg; Tran, Hoang Son ULg; Colson, Pierre ULg et al

in Journal of Physical Chemistry C (2015), 119(4), 1642-1650

(Graph Presented). In this study, we report the synthesis of Ti-doped mesoporous hematite films by soft-templating for application as photoanodes in the photoelectrolysis of water (water splitting ... [more ▼]

(Graph Presented). In this study, we report the synthesis of Ti-doped mesoporous hematite films by soft-templating for application as photoanodes in the photoelectrolysis of water (water splitting). Because the activation of the dopant requires a heat treatment at high temperature (≥800°C), it usually results in the collapse of the mesostructure. We have overcome this obstacle by using a temporary SiO2 scaffold to hinder crystallite growth and thereby maintain the mesoporosity. The beneficial effect of the activated dopant has been confirmed by comparing the photocurrent of doped and undoped films treated at different temperatures. The role of the mesostructure was investigated by comparing dense, collapsed, and mesoporous films heated at different temperatures and characterized under front and back illumination. It turns out that the preservation of the mesotructure enables a better penetration of the electrolyte into the film and therefore reduces the distance that the photogenerated holes have to travel to reach the electrolyte. As a result, we found that mesoporous films with dopant activation at 850°C perform better than comparable dense and collapsed films. [less ▲]

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See detailEffects of Starch as Carbon precursor on hydrothermal synthesis and Electrochemical performance of Sodium manganese iron phosphate /carbon
Karegeya, Claude ULg; Vertruyen, Bénédicte ULg; Cloots, Rudi ULg et al

Poster (2014, November 05)

Currently Sodium based electrode materials for Li and Na-ion batteries are getting more attention as the most promising potential alternatives of their lithiated counterparts due to their cost effective ... [more ▼]

Currently Sodium based electrode materials for Li and Na-ion batteries are getting more attention as the most promising potential alternatives of their lithiated counterparts due to their cost effective, environmental friendly characteristics and availability of sodium. Nevertheless, it remains a practical challenge to find an electrode material of LIBs and SIBs showing ideal performance. We report here a composite material of Sodium manganese iron phosphate/carbon, successfully synthesized by hydrothermal method. We have characterized our material by using a combination of Powder X-ray diffraction (XRD), scanning electron Microscopy (SEM) and thermal gravimetric analysis (TGA). Sodium manganese iron phosphate (NMFP) particles are electrochemically activated by starch and acetylene black to form NMFP/C cathode material for LIBs. NMFP/C composite in which starch is used as carbon precursor exhibits good discharge capacity due to the presence of pyran rings which increase NMFP/C conductivity. [less ▲]

Detailed reference viewed: 33 (3 ULg)