Physical and chemical characterization of a porous phosphate-modified zirconia substrate

Development and characterization of polymer-grafted ceramic membranes for solvent nanofiltration

“…At present covalent hybrid materials based on OPCA have found relatively few applications. In separation domains, OPCA have been used to modify inorganic membranes [154] or supports for chromatography [190]. Random et al [40] prepared an organo-ceramic membrane by grafting n-butylphosphonic acid and dodecylphosphonate on the surface of an alumina membrane with a pore diameter of 5 nm.…”

Electrochemical Properties of a Porphyrin-Cobalt (II) Adsorbed on Silica–Titania–Phosphate Composite Surface Prepared by the Sol–Gel Method

“…The phosphate ion was adsorbed by immersing 3.0 g of SiO 2 /TiO 2 in 50 mL of 0.2 mol L −1 phosphoric acid solution and shaken for 8 h. The solid was filtered, washed with bidistilled water, and dried at 353 K. The quantity of titanium oxide was obtained by gravimetric methods and phosphorus was determined in the solution phase by atomic absorption spectroscopy using the ICP technique (31).…”

“…The cross-polarizing magic angle spinning 31 P NMR spectra of the solids were obtained at room temperature on a Bruker AC300P spectrometer operating at 121 MHz. The conditions used for sequential pulse were: contact time of 1 ms, 2s of intervals between the pulses, and acquisition time of 11 ms.…”

Novel Modified Pyrrole Monomers, 1: Synthesis and Characterization

“…The surface modification of, e.g., TiO 2 substrates with alkyl phosphonic acids (RPO(OH) 2 ) is currently attracting growing interests for numerous applications such as corrosion inhibitors [20], gas-sensitive resistors [21], for metal extraction [22], ion-exchange, selective sorption [23,24] and in biochemical applications [25]. The anchoring of the phosphonic acid group is expected to involve both the coordination of the phosphoryl oxygen to Lewis acid sites and the condensation of P-OH groups with surface hydroxyl groups (Ti-OH) [26].…”