Investigation of the interaction between adsorbed water and various morphologies of boehmite nanoparticles prepared by continuous supercritical hydrothermal synthesis

Boehmite applications are often subject to specific characteristics in terms of morphologies and surface properties. The versatile continuous supercritical hydrothermal method allows synthesizing various boehmite from rhombic hexagonal platelet-like nanoparticles depending on the preferential adsorption part precursor after transformation species (020) resulting a growth along [001] mostly [100] directions. This free sites plays role morphology stabilizer results reduction adsorbed water. interaction between water depends parameters: 1) structure order as exhibited by XPS analysis associated with 1H Solid-State NMR spectroscopy and, 2) number available sites, which tend be filled nitrates observed Raman spectroscopy.