A5070116215- Bone Tissue Engineering Materials
- Layered Double Hydroxides Synthesis and Applications
- Inorganic Chemistry and Materials
- X-ray Diffraction in Crystallography
- Chemical Synthesis and Characterization
- Hydrogen Storage and Materials
- Concrete and Cement Materials Research
- Magnesium Oxide Properties and Applications
- Inorganic Fluorides and Related Compounds
- Crystallization and Solubility Studies
- Rare-earth and actinide compounds
- Luminescence Properties of Advanced Materials
- Crystal Structures and Properties
- Metal-Organic Frameworks: Synthesis and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Calcium Carbonate Crystallization and Inhibition
- Nuclear Materials and Properties
- Dental materials and restorations
- Nuclear materials and radiation effects
- Building materials and conservation
- Glass properties and applications
- Advanced NMR Techniques and Applications
- Advanced ceramic materials synthesis
- Polyoxometalates: Synthesis and Applications
- Clay minerals and soil interactions
Institut de Chimie de Clermont-Ferrand
2015-2024
University of California, San Diego
2024
Scripps Institution of Oceanography
2024
Centre National de la Recherche Scientifique
2013-2023
Université Clermont Auvergne
2014-2023
Sigma Clermont
2016-2020
Clermont-Ferrand’s Superior National School of Chemistry
2007-2015
University of Geneva
2000-2011
CEA Marcoule
2011
Laboratoire Mathématiques, Image et Applications
2008-2011
Abstract Hybrid materials based on layered double hydroxides (LDHs) exhibit great potential in diverse fields such as health care, polymer composites, environment, catalysis, and energy generation. Indeed, the compositional flexibility scalability of LDH structures, their low cost, ease synthesis have made hybrid LDHs extremely attractive for constructing smart high‐performance multifunctional materials. This review provides a comprehensive critical overview current research LDHs....
Through a topochemical oxidative reaction (TOR) under air, β‐Co(OH) 2 brucite type structure is converted into monometallic Co II III –CO 3 layered double hydroxide (LDH). The structural and morphological characterizations are performed using powder X‐ray diffraction, Fourier‐transformed IR spectroscopy, scanning transmission electron microscopy. local scrutinized an extended absorption fine structure, near‐edge pair distribution function analysis. chemical composition of pristine material...
Rietveld analysis on X-ray powder diffraction patterns recorded from Zn-doped, Zn/Sr, and Zn/Mg codoped biphasic calcium phosphate (BCP) samples has been used to locate Zn2+ cations in both hydroxyapatite (HAp) β-tricalcium (β-TCP) phases heat-treated at 1100 °C. Zn atoms occupy interstitial sites HAp (Wyckoff site 2b), leading an insertion solid solution of general composition Ca10Znx(PO4)6O2x(OH)2–2x. Replacement hydroxyl by O2– anions with formation linear O–Zn–O entities should be...
We report an original strategy to describe, viaX-ray photoelectron spectroscopy (XPS) measurements, the interactions between organic and mineral sub-systems within a multifunctional hybrid material. A tunable layered double hydroxide (LDH) host system, either Zn2Al- or Cu2Cr-hydrotalcite like compound, is modified with insertion of guest entities, 4-phenol-sulfonate (HBS) -carboxylate (HBC). The resulting are studied at two levels: after molecules' in LDH (ionic exchange counter-ions anions)...
Doped calcium phosphate bioceramics are promising materials for bone repair surgery because of their chemical resemblance to the mineral constituent bone. Among these materials, BCP samples composed hydroxyapatite (Ca10(PO4)6(OH)2) and β-TCP (Ca3(PO4)2) present a analogy with nano-multi-substituted bio-mineral part bones. At same time, doping can be used tune biological properties ceramics. This paper presents general overview mechanisms using cations from first-row transition metals (from...
The tetracalcium dialuminum hydroxide carbonate pentahydrate Ca4Al2(OH)12CO3.5H2O is a layered compound constituted by positively charged [Ca4Al2(OH)12]2+ main layers and negatively [CO3, 5H2O]2− interlayers. Al3+ Ca2+ ions are six- sevenfold coordinated O atoms, respectively. Water molecules occupy the seventh coordination site of three Ca among four contained in layer. Thus, five water interlayer, two them can be considered as slightly bonded. One atom group occupies remaining ion....
Ettringite (the AFt Ca6Al2(OH)12·(SO4)3·26H2O compound) and monosulfoaluminate AFm Ca4Al2(OH)12·SO4·6H2O phases were synthesised by the coprecipitation method studied micro-Raman spectroscopy. Hydrogen bond network, involving sulfate anions, ensures cohesion of structure these two compounds; columnar struture ettringite as well lamellar monosulfoaluminate. Raman spectroscopy has been used a probe to investigate mainly inter-columnar inter-lamellar regions structures. spectra allowed...
Sol–gel chemistry has been successfully used to prepare un-doped and Sr-doped calcium phosphate ceramics exhibiting a porous structure. The samples composition is very close the nominal one. All present phase mixtures of mainly hydroxyapatite (HAp) tricalcium (β-TCP). Doping with Sr2+ ions clear effect on proportions different phases, increasing amount β-TCP. An amorphous also observed incorporating some 40% total strontium. Strontium substitute for both in HAp β-TCP specific sites that have...
Monosulfate (3 CaO ·( Al x Fe 1 ) 2 O 3 · CaSO 4 ·12 H is an AF m phase that can be formed during the hydration of cement. Fe‐containing monosulfate and ( , mixed were synthesized characterized. Fe‐monosulfate composed a positively charged main layer [ Ca OH 6 ] + negatively interlayer / SO ·3 − crystallizes in trigonal symmetry, isotypic with ‐monosulfate. The solubility product at 25°C was determined to −31.57. formation solid solution due ‐ substitution structure observed. Based on...