Synthesis of porous yttrium aluminium oxide templated by dodecyl sulfate assemblies

Fractal Geometry Approach to Describe Mesostructured Boehmite and Gamma‐Alumina Nanorods

“…[31] They also prepared another kind of mesostructured alumina material (designated as MSU-gamma alumina) with exceptional surface area (300-350 m 2 g -1 ) and pore volume (0.45-0.75 cm 3 g -1 ), from Al(NO 3 ) 3 or AlCl 3 in the presence of nonionic triblock copolymer surfactants as the structure director. [26] M. Akia et al reported the preparation of mesostructured gamma alumina materials, from aluminum isopropoxide and a cationic surfactant; they obtained a maximum surface area of 396.5 m 2 g -1 , pore size of 13.26 nm, and a pore volume of 1.71 cm 3 g -1 .…”

“…[16] Furthermore, aging time, [14,17,18] hypercritical drying conditions, [19,20] surfactant assemblies, [21,22] calcination temperature, and atmosphere could affect the texture of the nanoparticles of boehmite/γ-alumina prepared by the sol-gel technique. Previously, alumina mesostructures containing a transition alumina have been synthesized from aluminum alkoxides or aluminum inorganic salts in the presence of cationic, [23,24] anionic, [25][26][27] or nonionic triblock copolymer [22,[28][29][30] surfactants as the structure directors. However, the surfactant needs to be removed from the final product, usually by cal-cination or extraction; in many cases, the composite was not stable towards the removal of the surfactant.…”

Investigation of phase formation dependency of photoluminescence properties of Eu3+ in Mg4Al2O7:Eu3+,Dy3+ and Ca4Al2O7:Eu3+,Dy3+ red-emitting phosphors

“…Different aluminate ceramics are good candidate materials for optical and electronic applications [1][2][3]. At the same time, aluminate materials could be successfully used as a solid oxide fuel cell functional anode material [4].…”

Mesoporous Magnetic Materials Based on Rare Earth Oxides

“…[13] However, the introduction of yttrium species into the inorganic framework of Al-and Gabased mesophases yielded highly ordered mesoporous Al ± Y and Ga ± Y mixed oxides with specific surface areas of 798 and 714 m 2 g À1 , respectively. [14,15] Here we report on the first synthesis and characterization of mesoporous rare earth oxides, as well as their anomalous magnetic properties.The X-ray diffraction (XRD) pattern of the solid erbiumbased mesophase isolated after a reaction time t of 3 h (see Kurtz [12] P,P-Diphenylphosphinic amide (0.22 g, 1.0 mmol) was placed in a flame-dried 25-mL test tube and dissolved in CH 2 Cl 2 (4.4 mL). To the solution was added benzaldehyde (0.20 mL, 2.0 mmol) and triethylamine (0.42 mL, 3.0 mmol), and then the mixture was cooled with an ice-water bath.…”