A5046419705- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Zeolite Catalysis and Synthesis
- Mesoporous Materials and Catalysis
- Catalysis and Hydrodesulfurization Studies
- Polyoxometalates: Synthesis and Applications
- Catalysts for Methane Reforming
- Metal-Organic Frameworks: Synthesis and Applications
- Catalysis for Biomass Conversion
- Environmental remediation with nanomaterials
- Chemical Synthesis and Characterization
- Ammonia Synthesis and Nitrogen Reduction
- Nanomaterials for catalytic reactions
- Transition Metal Oxide Nanomaterials
- Advanced Photocatalysis Techniques
- Crystal Structures and Properties
- Luminescence Properties of Advanced Materials
- Radioactive element chemistry and processing
- Electrocatalysts for Energy Conversion
- Solid-state spectroscopy and crystallography
- Thermochemical Biomass Conversion Processes
- Semiconductor materials and devices
- Biodiesel Production and Applications
- Metal Extraction and Bioleaching
- Electronic and Structural Properties of Oxides
Sorbonne Université
2016-2025
Laboratoire de Réactivité de Surface
2016-2025
Centre National de la Recherche Scientifique
2016-2025
UPMC Health System
2016-2017
Délégation Paris 6
2016
Marie Curie
2015
Kyoto University
2008-2010
Osaka Prefecture University
1998-2009
Canadian Nautical Research Society
2009
Université Paris Cité
2008-2009
Tantalum-containing SiBEA zeolite with isolated framework mononuclear Ta(V) doped Ag, Cu, and Zn was prepared characterized by XRD, XPS, DR UV–vis, FTIR (with pyridine, 2,6-di-tert-butylpyridine, pyrrole, deuterated chloroform). The conversion of ethanol as a renewable raw material into 1,3-butadiene the Lebedev method over these catalysts investigated. doping TaSiBEA changes its catalytic properties in result modification acid–base formation additional dehydrogenation sites. Such allows...
V-loaded β zeolites can be prepared by a two-step post-synthesis method which consists of first creating vacant T-sites dealumination the zeolite with nitric acid, then contacting them an ammonium metavanadate solution; SiOH consumption and nature incorporated V species are characterized IR, UV–VIS 29Si MAS NMR spectroscopies.
The dealumination of BEA zeolite by treatment with concentrated nitric acid is evidenced X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) spectroscopy. Two-dimensional 27Al 3Q 5Q magic-angle-spinning (MAS) NMR allow the detection two kinds tetrahedral Al atoms whose relative amounts depend on Si/Al ratio which correspond to specific T-sites. 29Si MAS 1H measurements confirm these results. spectra evidence resonances at around −114 −111 ppm ascribed Si sites Si(OSi)4 environment...
VSiβ zeolites prepared by contacting dealuminated Siβ zeolite with aqueous solutions of ammonium metavanadate at room temperature have been studied diffuse reflectance UV−visible and photoluminescence spectroscopy. spectroscopy shows that whatever the vanadium content, is present in as-prepared only one kind tetrahedral coordination. After calcination then rehydration low V still VV species observed. However, calcined/rehydrated high two kinds octahedral are revealed. In contrast, static or...
A MnSiBEA zeolite has been prepared <italic>via</italic> a two-step postsynthesis procedure which consisted, in the first step, of treatment tetraethylammonium BEA with nitric acid for formation vacant T-atom sites and then, second incorporation Mn ions into framework, resulting SiBEA zeolite, through their reaction silanol group sites.
Research results about the influence of BEA zeolite preliminary dealumination on acid–base characteristics and catalytic performance 1% Zn-BEA compositions in propane dehydrogenation with CO2 are presented. The catalyst samples, prepared through a two-step post-synthesis procedure involving partial or complete specimen followed by introduction Zn2+ cations into T-positions framework, were characterized using XRD, XPS, MAS NMR, SEM/EDS, low-temperature N2 ad/desorption, C3H8/C3H6 (CO2,...
The presence of different vanadium species in VSiβ zeolite is evidenced by diffuse reflectance UV−visible and photoluminescence spectroscopies, but only the latter able to clearly distinguish three kinds tetracoordinated sites reveal effects V loading dehydration−hydration processes on environment species.