3179 results about "Mesoporous silica" patented technology

The present invention relates to catalysts in mesoporous structures. In a preferred embodiment, the invention comprises a method for encapsulating a dispersed insoluble compound in a mesoporous structure comprising combining a soluble oxide precursor, a solvent, and a surfactant to form a mixture; dispersing an insoluble compound in the mixture; spray-drying the mixture to produce dry powder; and calcining the powder to yield a porous structure comprising the dispersed insoluble compound.

The invention relates to supported polyoxometalates represented by the formula (An)m+ [M4(H2O)10(XW9O33)2]m− or solvates thereof, wherein A represents a cation, n is the number of cations, m is the charge of the polyoxoanion, M is a transition metal, and X is an element selected from the group consisting of As, Sb, Bi, Se and Te, characterized in that the polyoxometalate is supported on a solid support selected from the group consisting of Al2O3, MgO, TiO2, ZrO2, SiO2, mesoporous silica, active carbon, diatomite, clays, zeolites, polyoxometalate salts and mixtures thereof, with the proviso that the polyoxometalate salt supports are different from the supported polyoxometalates defined by the above formula, a process for their preparation and their use for the catalytic oxidation of organic molecules.

A hollow-structured mesoporous silica material composed of hollow silica particles that have a shell having radial-arrayed channels, and a process for its preparation. The thin-shell type of mesoporous materials with different morphologies are prepared by growing and synthesizing mesoporous silica on the surface of calcium carbonate nanoparticles with different shapes as inorganic templates, and then removing the inorganic templates. The hollow-structure mesoporous silica material can be used in many fields such as the preparation of catalyst, pesticide and optical fiber.

The mesoporous silica material consists of hollow silica grains with radically radial arranged hole canal in the wall. The present invention also provides the preparation process of the said mesoporous silica material, and the preparation process includes adopting calcium carbonate in different forms as inorganic template; growing and synthesizing mesoporous material on the surface and subsequent eliminating the inorganic template to obtain thin shell type mesoporous material in different forms. The present invention also provides the application of the mesoporous silica material in preparing catalyst, pesticide and optical fiber.

Novel lamellar mesoporous silica compositions which can contain functional inorganic elements and organic functional groups as part of the lamellar silica framework structure are described. The compositions are prepared using gemini amine surfactants as templates or structure directing agents. The compositions have novel high temperature and hydrothermal stability and unique fundamental particle structures.

The invention disclosed a novel mesoporous silica-based xerogel and its use in hemorrhage control. The mesoporous silica-based xerogel material has tunable mesopores (1-50 nm), high specific surface area (100-1400 m2 / g), macroscopical morphology (powder, film, disc, column, etc.) and adjustable compositions (SiO2, CaO and P2O5, etc.) as well as good biodegradation. The mesoporous silica-based xerogels herein effectively promote the blood clotting under various conditions including slow and severe hemorrhage, even at the blood oozing site of bone defect. Meanwhile, the networks of silica-based xerogel with good elastic and mechanic properties, formed by adsorbing a large amount of water, can modulate the cell behavior and tissue growth, and thus promote the wound healing. Additionally, due to the mesoporous structure, the materials have the potential to load drug, thrombin and bioactive factors, which is favorable for the therapeutical efficacy.

Disclosed are a preparation method and application of macroporous-mesoporous silicon dioxide hollow microsphere, which relate to the field of inorganic materials preparation and pesticide application. The process of materials preparation includes adding templates P123 in aqueous phase, after generating steady oil-water-oil dual emulsion, adding silica source tetraethyl ortho-silicate TEOS, producing hydrolysis under the effect of precipitant, generating silicon dioxide hollow microsphere, after filtering and drying, the product of the invention can be produced via calcining in 550 DEG C for 6 hours. The silicon dioxide hollow microsphere of the invention has macroporous structure and mesoporous structure. Through the mesoporous structure of the microsphere wall, realizing the communication between the hollow inside of the microshere and the outside. The invention also relates to the application in area of release carrier of the materials as avermectin drugs, the prepared release controlling agent has perfect long-acting slow release performance.

The invention discloses a mesoporous WO[3-x] visible-light-driven photocatalyst with oxygen vacancy and a preparation method thereof. The method comprises the following steps: calcinating at a controlled temperature of 350-600 DEG C in air so as to obtain a mesoporous silica molecular sieve KIT-6 loaded with tungsten trioxide by taking mesoporous silica molecular sieve KIT-6 as a hard template and a silicotungstic acid or phosphotungstic acid hydrate as a tungsten trioxide precursor; then calcinating at a controlled temperature of 450-550 DEG C so as to obtain a mesoporous silica molecular sieve KIT-6 provided with oxygen vacancy and loaded with tungsten trioxide by utilizing H2 as a reducing agent; and finally, removing the mesoporous silica molecular sieve KIT-6 by use of a 10wt% HF aqueous solution, thereby obtaining the mesoporous WO[3-x] visible-light-driven photocatalyst with oxygen vacancy and relatively large specific surface area and pore diameter. The mesoporous WO[3-x] visible-light-driven photocatalyst with oxygen vacancy is capable of effectively utilizing lights to rapidly catalyze CO2 so as to generate methane, and is high in catalysis efficiency, simple in preparation process and needed equipment, environmentally friendly in preparation process and free from pollution.