A5088523540- Mesoporous Materials and Catalysis
- Zeolite Catalysis and Synthesis
- Metal-Organic Frameworks: Synthesis and Applications
- Catalytic Processes in Materials Science
- Membrane Separation and Gas Transport
- Carbon Dioxide Capture Technologies
- Covalent Organic Framework Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advancements in Battery Materials
- Gas Sensing Nanomaterials and Sensors
- Lanthanide and Transition Metal Complexes
- Catalysis and Hydrodesulfurization Studies
- Nanoparticle-Based Drug Delivery
- Catalysts for Methane Reforming
- Catalysis and Oxidation Reactions
- Graphene research and applications
- Muon and positron interactions and applications
- Supercapacitor Materials and Fabrication
- Layered Double Hydroxides Synthesis and Applications
- Advanced Photocatalysis Techniques
- Polymer Surface Interaction Studies
- Electrocatalysts for Energy Conversion
- Aerogels and thermal insulation
- Advanced MRI Techniques and Applications
École Nationale Supérieure d'Ingénieurs de Caen
2021-2025
Laboratoire Catalyse et Spectrochimie
2021-2025
Université de Caen Normandie
2021-2025
Centre National de la Recherche Scientifique
2021-2025
Normandie Université
2021-2024
University of Vienna
2017-2022
Faculty (United Kingdom)
2019
Université Laval
2010-2017
Bethesda Hospital East
2016
Centre hospitalier universitaire de Québec
2011-2013
Metal-organic frameworks (MOFs) are commended as photocatalysts for H2 evolution and CO2 reduction they combine light-harvesting catalytic functions with excellent reactant adsorption capabilities. For dynamic processes in liquid phase, the accessibility of active sites becomes a critical parameter diffusion is limited by inherently small micropores. Our strategy to introduce additional mesopores selectively removing one ligand mixed-ligand MOFs via thermolysis. Here we report photoactive...
In order to investigate the details of process pore condensation and hysteresis mechanisms in three-dimensional (3-D) networks, we performed a systematic study adsorption behavior N2 (77.4 K) Ar 87.3 3-D ordered system, i.e., cubic Ia3̅d mesoporous KIT-6 silica materials with mode diameters ranging from ca. 5 nm up 11 nm. is porous material composed two intertwined subnetworks similar as MCM-48, but this can be prepared much larger mean diameters. Accurate size analysis was by X-ray...
We report here on an efficient one-step-impregnation method to synthesize crystalline mesoporous bimetal oxides (e.g.NiFe2O4, CuFe2O4, Cu/CeO2) using silicas as hard templates under optimized mixing conditions. This new procedure enables a true replication of the mesostructure with high yield and phase purity, while retaining particle morphology template.
Ein innovatives System für die orale Wirkstoffabgabe basierend auf der Funktionalisierung von Wirkstoff/Farbstoff-beladenen mesoporösen Siliciumdioxid-Nanopartikeln (MSNs) mit einem biologisch abbaubaren Nutrazeutikum (β-Lactoglobulin) wird vorgeschlagen. Die Konjugation des Nutrazeutikums verhindert nicht nur das Auslaugen Wirkstoffs/Farbstoffs unter sauren Bedingungen, sondern ermöglicht außerdem deren Freisetzung in gewünschten basischen Umgebungen (pH 7.4). As a service to our authors...
Abstract We propose large‐pore titanium‐containing organosilylated mesoporous silica (Ti‐SBA‐15) as a highly efficient catalyst for the oxidative desulfurization (ODS) of refractory aromatic sulfur compounds with aim to produce ultra‐low diesel. To achieve this, we synthesized series Ti‐SBA‐15 catalysts according new procedure. The procedure is based on controlled grafting titanium chelates SBA‐15 at low temperatures (5 °C). This specific synthesis ensured high dispersion required...
Metal-organic frameworks (MOFs) hold significant potential for use in gas storage, sensing and catalysis. To uncover this potential, MOF processing must develop line with materials. Here, direct ink writing-based 3D printing of UiO-66 composites their thermal treatment give mechanically stable yet highly porous effective the catalytic breakdown methyl-paraoxon, a simulant toxic organophosphate nerve agents.
Regarding the design of SBA-15 silica, substantial efforts were deployed in past decade order to understand mechanism formation and effects different synthesis conditions on structure porosity resulting materials. However, better insights into both tailoring characterization pore such mesoporous materials are still needed enable accurate control adsorption condensation properties SBA-15. For this, influence parameters silica must be rationalized terms their implications for architecture,...
The CO2 adsorption behavior of nanosized chabazite (CHA) containing different compositions extra-framework alkali metal cations (Na+, K+, Cs+) with a constant Si/Al ratio 2.2 was investigated experimentally (adsorption isotherms and in situ Fourier transform infrared (FTIR) spectroscopy) theoretically by Grand Canonical Monte Carlo (GCMC) modeling. were good agreement the GCMC modeling pressure range 0–60 kPa for all samples except Cs+-containing CHA. did not consider kinetics adsorption;...
Abstract Mesoporous silica nanoparticles (MSNs) are of growing interest for the development novel probes enabling efficient tracking cells in vivo using magnetic resonance imaging (MRI). The incorporation Gd 3+ paramagnetic ions into highly porous MSNs is a powerful strategy to synthesize “positive” MRI contrast agents more quantitative T 1 ‐weighted MR imaging. Within this context, different strategies have been reported integrate chelates 2D pore network MSNs. As an alternative, we report...
Mesoporous silica nanoparticles (MSNs) are considered as promising next-generation nanocarriers for health-related applications. However, their effectiveness mostly relies on efficient and surface-specific functionalization. In this contribution, we explored different strategies the rational multistep synthesis of functional MCM-48-type MSNs with selectively created active inner and/or external surfaces. Functional groups were first installed using a combination (delayed) co-condensation...
The first successful example of Hg porosimetry on KIT-6 silicas is demonstrated. This study provides a more thorough understanding the textural properties mesostructures and SBA-15 silicas.
We demonstrate for the first time direct stereolithographic 3D printing of an extrinsically self-healing composite, comprised commercial photocurable resin modified with anisole and PMMA-filled microcapsules. The composites solvent-welding based autonomous to afford 87% recovery initial critical toughness. This work illustrates potential fabricate user-defined structures, avoiding need extensive rheological optimization inks, like in direct-write printing. Importantly, this also demonstrates...
The CO2 adsorption performance of a zeolite is related to the framework structure and extra-framework composition. In this work, parent Na-GIS partially exchanged NaMg1-GIS NaMg3-GIS, with 30 50% degree Mg2+ exchange, respectively, were prepared. Further, series zeolites thoroughly characterized studied for their applicability CO2/N2 CO2/CH4 separations by single-component dynamic breakthrough curve analysis methods. lower concentration cations in resulted enhanced due beneficial distortion...
Downsizing zeolite crystals is a rational solution to address the challenge of slow adsorption rates for industrial applications. In this work, we report an environmentally friendly seed-assisted method synthesizing nanoscale P, which has been shown be promising binary separations. The potassium-exchanged form nanoagglomerates demonstrates dramatically enhanced CO
Zeolites are crystalline microporous materials constructed by corner-sharing tetrahedra (SiO4 and AlO4), with many industrial applications as ion exchangers, adsorbents heterogeneous catalysts1–4. However, the presence of micropores impedes use zeolites in areas dealing bulky substrates. Introducing extrinsic mesopores, that is, intercrystal/intracrystal is a solution to overcome diffusion barrier5–8. Still, those mesopores generally disordered non-uniform; moreover, acidity crystallinity...
A luminescent triarylboron ligand functionalized with three carboxylic groups has been synthesized and fully characterized. Its use in boron-containing metal–organic frameworks (B-MOFs) demonstrated by the synthesis isolation of a ZnIIB-MOF compound (B-MOF-1). The crystals B-MOF-1 belong to cubic space group F432 8-fold interpenetrated networks ∼21% void space. exhibits blue fluorescence is capable modest gas sorption N2, argon, CO2.
Mesoporous silica nanoparticles (MSNs) are used in drug delivery and cell tracking applications. As Mn(2+) is already implemented as a "positive" contrast agent preclinical imaging procedures (in the form of MnCl2 for neurological studies), introduction Mn porous network MSNs would allow labelling cells them using MRI. These particles general internalized endosomes, an acidic environment with high saline concentration. In addition, available MSN porosity could also serve carrier to deliver...
Abstract Adsorption on various adsorbents of hydrogen and helium at temperatures close to their boiling points shows, in some cases, unusually high monolayer capacities. The microscopic nature these adsorbate phases low has, however, remained challenging characterize. Here, using high-resolution cryo-adsorption studies together with characterization by inelastic neutron scattering vibration spectroscopy, we show that, near its point (~20 K), H 2 adsorbed a well-ordered mesoporous silica...
The urgent need to mitigate carbon emissions has spurred research into small-pore zeolites as cost-effective options for CO2 capture by solid adsorbents, particularly in postcombustion and biogas separation applications. In this study we investigate levyne (LEV-type) zeolite, a largely unexplored material adsorption, novel adsorbent gas separation. Using seed-assisted synthesis approaches different conditions, nanosized micron-sized LEV were synthesized characterized terms of pathways,...