Florence Babonneau

TL;DR: In this article, the authors designed elaboration of alumina sub-micrometric spherical powder that combines 3D ordered mesoporosity of high accessibility, nanocrystalline structure, and thermal stability up to 900 °C is reported.

TL;DR: In this article, a mixture of hybrid organic−inorganic materials derived from 3-glycidoxypropyltrimethoxysilane have been synthesized via sol−gel using BF3 etherate as a catalyst of organic polymerization.

Abstract: Aluminum sec-butoxide can be modified by chelating ligands such as ethylacetoacetate (etac). Al(OBus)2(etac) was characterized by IR, 27Al, 13C and 1H NMR: several oligomeric species containing 4, 5 or 6 coordinated Al atoms could be present. During hydrolysis, butoxy groups are rapidly removed, but the presence of less hydrolyzable ligands slows down the reactivity of the precursor towards water. Precipitation can be avoided. Thus, this precursor appears quite attractive for the preparation of multicomponent ceramics such as α-cordierite. Modified aluminum alkoxide, tetraethoxysilane and magnesium acetate were used to obtain monolithic gels that convert into α-cordierite at 1000°C. The conversion processes, from the solution to the gel and the ceramics, were followed by 27Al and 29Si NMR in both liquid and solid states.

TL;DR: A combination of one-dimensional and two-dimensional solid-state magic angle spinning nuclear magnetic resonance (MAS NMR) experiments has been used to investigate the hybrid organic−inorganic interfaces in surfactant templated silicas as discussed by the authors.

TL;DR: A second generation of boron nitride-based porous materials has been synthesized by a double nanocasting process via a carbonaceous template as a medium starting from a zeolite.