摘要:
A process is described for the preparation of an inorganic material with a hierarchical porosity in the micropore and mesopore domains. The material has at least two elementary spherical particles having a maximum diameter of 200 microns. The process comprises: a) preparing a solution containing zeolitic nanocrystals with a maximum nanometric dimension equal to 60 nm based on silicon and/or precursor elements of proto-zeolitic entities based on silicon; b) mixing, in solution, metallic particles or at least one metallic precursor of metallic particles, a surfactant and the solution obtained in accordance with a) such that the ratio of the volumes of inorganic and organic materials, Vinorganic/Vorganic, is 0.29 to 0.50; c) aerosol atomization of the solution obtained in b) resulting in formation of spherical droplets; d) drying the droplets; g) eliminating the template and surfactant.
摘要:
The invention relates to a material having a hierarchised porosity and consisting of at least two elementary spherical particles having a maximum diameter of 200 microns, at least one of said spherical particles comprising at least one matrix based on silicon oxide. Said material has a macroporous volume measured by mercury porosimetry of between 0.05 and 1 ml/g, a mesoporous volume measured by nitrogen volumetry of between 0.03 and 0.4 ml/g, and the matrix comprises amorphous walls. The invention also relates to the preparation of the material.
摘要:
A mesostructured material is described that is composed of at least two elementary spherical particles, each of said particles comprising a mesostructured matrix based on aluminium oxide, said matrix having a pore diameter between 1.5 and 30 nm and an aluminium oxide content that represents more than 46% by weight relative to the weight of said matrix, which matrix has amorphous walls of thickness between 1 and 30 nm, said elementary spherical particles having a diameter D greater than 10 µm and less than or equal to 100 µm (10 100). Said mesostructured matrix may also contain silicon oxide. Each of the spherical particles of the mesostructured material may also contain zeolite nanocrystals so as to form a material having a mixed porosity of both mesostructured and zeolitic nature. The preparation of said material is also described.
摘要:
The invention relates to a material having a hierarchised porosity and made of at least two elementary spherical particles having a maximum diameter of 200 microns, at least one of said spherical particles including at least one matrix containing silicon oxide and having crystallised walls, wherein said material has a macroporous volume as measured by mercury porosimetry of between 0.05 and 1 ml/g, and a mesoporous volume as measured by nitrogen volumetric analysis of between 0.03 and 0.4 ml/g. The invention also relates to the preparation of this material and to the use thereof as an adsorbent or an acidic solid.
摘要:
An inorganic material is described that is composed of at least two elementary spherical particles, each of said spherical particles comprising metallic nanoparticles having a size between 1 and 300 nm and a mesostructured matrix based on an oxide of at least one element X chosen from the group composed of silicon, aluminium, titanium, tungsten, zirconium, gallium, germanium, tin, antimony, lead, vanadium, iron, manganese, hafnium, niobium, tantalum, yttrium, cerium, gadolinium, europium and neodymium and the mixture of at least two of these elements, said mesostructured matrix having a pore diameter between 1.5 and 30 nm and having amorphous walls of thickness between 1 and 30 nm, said elementary spherical particles having a diameter D greater than 10 µm and less than or equal to 100 µm. Said material may also contain zeolite nanocrystals trapped within said mesostructured matrix.
摘要:
The invention relates to a material having a hierarchised and organised porosity in terms of microporosity and mesoporosity, that comprises at least two elementary spherical particles, each of said particles including a meso-structured silicon-oxide-containing matrix having a mesopore diameter of between 1.5 and 30 nm and having microporous crystallised walls with a thickness of between 1 and 60 nm, wherein said elementary spherical particles have a maximum diameter of 200 microns. The invention also relates to the preparation of said material.
摘要:
A mesostructured aluminosilicate material is described that is composed of at least two elementary spherical particles, each of said spherical particles being composed of a matrix based on silicon oxide and aluminium oxide, said matrix having a pore diameter between 1.5 and 30 nm, an Si/Al molar ratio at least equal to 1 and having amorphous walls of thickness between 1 and 30 nm, said elementary spherical particles having a diameter D such that 10
摘要:
An inorganic material is described consisting of at least two elementary spherical particles, each of said spherical particles comprising metallic particles in the form of polyoxometalate of formula (XxMmOyHh)q- where H is hydrogen, O is oxygen, X is an element chosen from phosphorus, silicon, boron, nickel and cobalt and M is one or more elements chosen from vanadium, niobium, tantalum, molybdenum, tungsten, iron, copper, zinc, cobalt and nickel, x being equal to 0, 1, 2 or 4, m being equal to 5, 6, 7, 8, 9, 10, 11, 12 and 18, y being between 17 and 72, h being between 0 and 12 and q being between 1 and 20 (y and q being integers). Said metallic particles are present within a mesostructured matrix based on an oxide of an element Y chosen from the group consisting of silicon, aluminium, titanium, tungsten, zirconium, gallium, germanium, tin, antimony, lead, vanadium, iron, manganese, hafnium, niobium, tantalum, yttrium, cerium, gadolinium, europium and neodymium and the mixture of at least two of these elements. Said matrix has pores with a diameter between 1.5 and 50 nm and amorphous walls with a thickness between 1 and 30 nm, said elementary spherical particles having a maximum diameter of 200 microns.
摘要:
The invention relates to a material having a hierarchised porosity and consisting of at least two elementary spherical particles. Each of said particles comprises a mesostructured matrix based on silicon oxide, the diameter of the mesopores being between 1.5 and 30 nm, and amorphous and microporous walls having a thickness of between 1.5 and 50 nm, the elementary spherical paricules having a maximum diameter of 200 microns. The matrix based on silicon oxide can contain aluminium. The invention also relates to the preparation of said material.
摘要:
An inorganic material is described that is composed of at least two elementary spherical particles, each of said spherical particles comprising metallic nanoparticles having a size between 1 and 300 nm and a mesostructured matrix based on an oxide of at least one element X chosen from the group composed of silicon, aluminium, titanium, tungsten, zirconium, gallium, germanium, tin, antimony, lead, vanadium, iron, manganese, hafnium, niobium, tantalum, yttrium, cerium, gadolinium, europium and neodymium and the mixture of at least two of these elements, said mesostructured matrix having a pore diameter between 1.5 and 30 nm and having amorphous walls of thickness between 1 and 30 nm, said elementary spherical particles having a diameter D greater than 10 µm and less than or equal to 100 µm. Said material may also contain zeolite nanocrystals trapped within said mesostructured matrix.