67results about How to "Has a mesoporous structure" patented technology

The invention discloses a biological activity glass meso-porous microsphere and a preparation method thereof. The biological activity glass meso-porous microsphere comprises the following chemical compositions in percentage by weight: 16 to 36 percent of CaO, 4 percent of P2O5 and 60 to 80 percent of SiO; the average grain diameter is between 2 and 5 mu m; the grains are sphere -shaped; the specific surface area of the grains is between 30.6m<2>/g and 89.7m<2>/g; and the meso-porous diameter is between 1.9 and 4.1nm. The method adopts the organic template method, comprising the following the steps that: a catalysts is added in deionized water, the mixed solution is added with tetraethoxysilane, triethyl phosphate and calcium nitrate tetrahydrate for hydrolysis reaction, the mixed solution is added with organic template polyethylene glycol and fully stirred to obtain sol, the sols is subject to aging to form wet gel, the wet gel is immersed in and washed by absolute ethyl alcohol and dried to obtain dry gel, and the dry gel is put in a crucible for heat treatment to obtain the finished products. The biological activity glass meso-porous microsphere has the advantages of higher biological activity and degradation property and good biological compatibility.

The invention belongs to the field of preparing material of nanometer and sub-micron of inorganic semiconductor, it is especially relates to the preparation method of colloid granule of TiO2 whose size is between dozens of nanometers and dozens of sub-microns, whose pattern can be controlled, which is monodisperse and has spherical mesoporous. At room temperature, wrap up and cover a layer of TiO2 on surface of polymeric microballoon sphere (PSMMA) and then swell and infiltrate it through the mixed solution of toluene or tetrahydrofuran and ethanol, make colloid granule of TiO2 which is monodisperse and which has spherical mesoporous after getting even complex granule. The preparation method of this invention is simple, the colloid granule of TiO2 has high purity and good dispersibility, diameter of the granule is between 20-2000 nanometer, specific area is between 50-1000m2/g, the size of the granule distributes narrowly and the warp is smaller than 10%, and the size of granule can be controlled through the covering thickness of TiO2 and size of granule of PSMMA .

The invention discloses a novel catalyst for carrying out liquid-phase high-selectivity catalytic oxidation on methylbenzene. The catalyst mainly takes an alkaline-earth metal composite oxide with high temperature stability as a carrier and metals (V, Cr, Mn, Fe, Co, Ni, Cu, Au, Pd and Pt) with high activity as catalytic oxidation active centers. The prepared catalyst shows high selectivity and activity in liquid-phase oxidation of methylbenzene. Under the conditions that the reaction temperature is 90-160 DEG C, the reaction time is 2-48 hours and the pressure of air or oxygen is 0.5-2.0MPa, the highest selectivity of benzaldehyde can be 94.0% and the highest conversion rate of methylbenzene also reaches 45.0%. Compared with the reported results, the prepared catalyst has the advantages that the catalyst still has good mesoporous structure under high temperature; in the catalysis process, the conversion rate of methylbenzene and the yield of benzaldehyde are high; and meanwhile, any solvent or organic additive is not added to a reaction system and the catalyst has the advantages of high yield, low cost, no environmental pollution, easy separation, good repeatability and the like.

The invention discloses a spinel type mesoporous high-entropy oxide (NiCoCrFeMn)3O4 nanosphere with a hollow structure, a preparation method and application thereof, and belongs to the technical fieldof advanced nano materials. The preparation method comprises: carrying out a covalent cross-linking reaction on formaldehyde and tannic acid in weakly alkaline water/alcohol mixed solvent by using pluronic F127 to control morphology, using the tannic acid as an organic ligand and using the formaldehyde as a cross-linking agent to prepare a tannic acid-formaldehyde oligomer; then carrying out a hydrothermal reaction on a metal precursor containing equimolar Ni<2+>, Co<2+>, Cr<3+>, Fe<2+> and Mn<2+> and the prepared tannic acid-formaldehyde oligomer to obtain nickel (II)-cobalt (II)-chromium (III)-iron (II)-manganese (II)-tannic acid-formaldehyde polymer nanospheres; and roasting in an air atmosphere to obtain the spinel type mesoporous high-entropy oxide (NiCoCrFeMn)3O4 nanosphere with thehollow structure. The prepared mesoporous high-entropy oxide (NiCoCrFeMn)3O4 nanosphere has a hollow structure, a high specific surface area, a large pore volume and superparamagnetism, so that the mesoporous high-entropy oxide (NiCoCrFeMn)3O4 nanosphere can be applied to the aspects of catalysis, separation, electrode materials and the like.

The invention relates to a preparation method of hollow mesoporous silica nano microspheres, which comprises the following steps: by using polystyrene microspheres (PS microspheres) with positive cations on the surfaces as a template and tetraethoxysilane (TEOs) as a silicon source, reacting in an alkaline environment to obtain silica-coated polystyrene microspheres (PS@SiO2); and calcining the obtained PS@SiO2 nano-microsphere to obtain the hollow silicon dioxide nano-microsphere with the mesoporous structure. According to the preparation method disclosed by the invention, the hollow mesoporous silicon dioxide spheres with the shell thickness of 8-40 nm can be obtained by only adjusting the addition amount of tetraethoxysilane (TEOs) without adding a surfactant and other pore-foaming agents. The method has the advantages of simple preparation method, good reproducibility (repeated experiments for at least 50 times), low cost (low drug price) and the like. The obtained hollow mesoporous silica nanospheres have the characteristics of good dispersibility, large specific surface area, small shell thickness, uniform size and the like.

The invention discloses a method for preparing a visible-light response photocatalyst by utilizing nano Zn2SnO4. The method comprises a step of preparing a solvent thermal product, a step of preparing Zn2SnO4 nano powder, a step of preparing a turbid liquid, a step of preparing a hydrothermal reaction product and a step of preparing the visible-light response photocatalyst. According to the method disclosed by the invention, a synthesis process is simple and convenient, impurities introduced by follow-up processes such as high-temperature calcining and ball-milling and structure defects are avoided, operations are easy, and purity of products synthesized by reaction is high. The visible-light response photocatalyst synthesized by the method is a nano structure, is small in crystalline grain, and has a mesoporous structure and a relatively great surface area, so that light absorption capacity of the visible-light response photocatalyst is strengthened; and meanwhile, a migration distance of light-generated electrons is shortened, and recombination probability of light-generated electrons and electron-hole pairs is reduced.

The invention relates to a mesoporous Ag/Ag2O/TiO2 solid microsphere material preparation method, which specifically comprises: dissolving a silver-containing compound, a titanium-containing compound and a surfactant in a solvent, completely stirring, dissolving, carrying out standing settling, carrying out a hydrothermal reaction, washing the obtained product, drying, and calcining in an air atmosphere to obtain the mesoporous Ag/Ag2O/TiO2 solid microsphere material. According to the present invention, the prepared mesoporous Ag/Ag2O/TiO2 microsphere solid material has good repeatability; the morphology of the product is gradually away from the spherical shape along with the increase of the Ag-to-Ti ratio while the mesoporous structure is remained basically; and the final sample has a large specific surface area and more active sites so as to provide a certain promotion effect for the catalytic reaction.

The invention provides a quantative production method for a SiO2-based biological active tissue repair material. The method comprises the following steps: mixing water and a catalyst; adding a siliconsource precursor by a liquid charging device; adding a phosphorus source precursor by using the liquid charging device; adding a calcium source precursor by using a solid charging device; adding an inorganic salt substance containing rare earth metals by using the solid charging device; forming a wet gel and carrying out room temperature ageing; then carrying out high-temperature ageing; forminga dry gel to grind in a wet manner; and drying and screening the dry gel to finally obtain the SiO2-based biological active tissue repair material which nano porosity and high specific surface area. The preparation method is simple in step, easy to control flow, low in price of materials, needed equipment is common equipment, the single output can reach kg level, and problems of unstable batches and poor repeatability in a process of preparing powder are solved effectively.

The invention belongs to the technical field of mesoporous material preparation, and particularly relates to a solid carbon-zirconium dioxide nano composite in an ordered mesoporous structure, and a synthetic method of the composite. The composite is large in specific surface area (300-594m<2>/g) and pore volume (0.20-0.48cm<3>/g), and uniform in aperture (2.5-3.2nm). The synthetic method of the composite comprises the steps of taking zirconium tetrachloride as an inorganic precursor, A-stage phenolic resin as a polymeric source and F127 as a surfactant, and synthesizing the ordered mesoporous carbon-zirconium dioxide nano composite by integrating a ternary co-assembly method and an in-situ crystallization technology. The synthetic method is simple to operate and low in cost, and the prepared composite has immeasurable potential application prospects in many aspects.

The invention discloses a preparation method of a hierarchical pore TS-1 molecular sieve, wherein the hierarchical pore TS-1 molecular sieve is obtained by taking a silicon-titanium ester polymer as atitanium-silicon source. According to the method, silicon and titanium are uniformly linked to the same polymer, and the hydrolysis rate is equivalent during hydrolysis, so that TiO2 precipitation can be prevented, and generation of non-framework titanium is reduced; and the novel silicon-titanium ester polymer can be used as a silicon source and a titanium source and can also be used as a mesoporous template agent in the synthesis process, so that the obtained TS-1 molecular sieve has a mesoporous structure and narrow pore size distribution.

The invention relates to a photocatalyst for removing volatile organic compounds (VOCs) contained in fresh air which is inhaled into indoor by a fresh air system. A hydrothermal synthesis method is used for preparing a TiO2 material with a mesoporous structure and a high photocatalytic activity, and a photocatalyst prepared by the method has the mesoporous structure and high photocatalysis efficiency for removing formaldehyde. The invention is characterized in that a preparation method comprises the following steps: a certain amount of titanium alkoxide is dissolved into absolute ethyl alcohol, and a solution A is prepared; a template whose mass percentage is 15-35% and a chelating agent whose mass percentage is 10-25% (the mass percentages are calculated based on the titanium alkoxide raw material) are dissolved into deionized water, and a solution B is prepared; the solution A and the solution B are mixed in order to prepare suspension liquid; the suspension liquid is transferred to a crystallization reaction vessel whose inner liner is made from polytetrafluoroethylene, a reaction is carried out at 150-220 DEG C for 6-24 hours, the reaction vessel is cooled to a room temperature, centrifugation is carried out for reaction products in order to obtain precipitation, deionized water and absolute ethyl alcohol are used for cleaning for 5-10 times, pumping filtration is carried out in order to obtain a sample, and the sample is dried in a baking oven at 100-120 DEG C for 12-24 hours in order to obtain powder; the powder is placed in a muffle furnace, the muffle furnace is heated at a speed of 1-5 DEG C/min to 450-650 DEG C, calcination is carried out for 3-5 hours, and the TiO2 photocatalyst with the mesoporous structure is obtained.

The invention relates to a mesoporous Zr-based coordination polymer, the coordination polymer is a mesoporous material, the average aperture is 3.8-6 nm, and the specific surface area is 125-157 m<2>/g. A preparation method comprises the following steps: respectively preparing a ZrCl4 aqueous solution and an aqueous solution of terephthalic acid and alkali (or organic amine), mixing the components to obtain a sample system, reacting the sample system for 1-24 h, performing centrifugation, using triethylamine and acetone for repeatedly washing for 2-3 times in order, and performing vacuum drying for 12 h at the temperature of 60 DEG C to obtain the mesoporous Zr-based coordination polymer. The mesoporous Zr-based coordination polymer has the characteristics of high specific surface area and meso pore, the preparation method has the advantages of simple process, no pollution, and high yield, and is suitable for large-scale production. The mesoporous Zr-based coordination polymer has high adsorption quantity on a dye (methylene blue and methyl orange) and heavy metal ions (Fe<3+>, Co<2+>, Ni<2+> and Cu<2+>), is reusable, and can still reach 93.4% of the primary adsorption quantity after 5-time repetition.

The invention relates to a mesoporous-structure polycaprolactone modified by a natural high polymer and application thereof. The mesoporous-structure polycaprolactone modified by the natural high polymer has the advantages of high modification degree, a modifying object has small possibility of dissolving out and the like. In addition, the polycaprolactone provided by the invention also has a medicine slow-release function, and lays a foundation for the polycaprolactone to become a medicine-carrying functionalization tissue engineering support.

The present invention belongs to the technical field of the nano material, especially relating to a hollow silica submicron ball with a kernel and the preparation method and the use. In an alcohol system, a silicon ester and a silane coupling agent hydrolyze together under an ammonia catalysis, which produces the hybrid silica submicron ball. The hydrofluoric acid liquor processes a sol of the hybrid silica submicron ball, which produces the hollow silica submicron ball with the kernel. The particle size of the round submicron ball is between 100nm and 1000nm and the thickness of a shell is between 20nm and 200 nm. A movable round silica kernel with the particle size between 50nm and 600nm is in a hollow cavity. The submicron ball has a mesopore structure, of which the average pore diameter is between 3nm and 10nm and the specific surface area is between 140m2/g and 500 m<2>/g. the present invention can serve as a release carrier for a therapeutic medicine and can be used to build a photonic crystal, serving as a micro reactor, a energy storage material and a catalyst carrier of the chemical reaction. The present invention has the simple method and process and short production period.

The invention discloses a preparation method of organic-inorganic hybrid transparent mesoporous gel monolith, belongs to the technical field of mesoporous molecular sieve functional materials, and particularly relates to a preparation method of organic-inorganic hybrid transparent mesoporous gel monolith which is large in size, crack-free and optically transparent and provided with pore walls modified by ethylidene. The preparation method is characterized by comprising the following steps of: by using 1,2-bis(triethoxysilane) ethane as a single silicon source, rapidly synthesising the organic-inorganic hybrid transparent mesoporous gel monolith provided with pore walls modified by ethylidene by controlling a component proportioning ratio and the conditions of system gelation in an acidic medium taking a nonionic surfactant as a template. The preparation method of the material is simple, and easy to operate; the product is regular in shape, controllable in size, and good in heat stability and transparency; and modifying groups are uniformly distributed in the pore walls of the transparent mesoporous gel monolith and unable to block pore channels. The preparation method has an important application value in the field of development for novel optical devices.

The invention discloses crystallized mesoporous magnesium silicate (3MgO.4SiO2.2H2O) powder and a preparation method thereof. The crystallized mesoporous magnesium silicate (3MgO.4SiO2.2H2O) powder is of a two-dimensional hexagonal mesoporous structure, and a mesopore wall is composed of crystalline-state magnesium silicate. The preparation method of the crystallized mesoporous magnesium silicate powder comprises the following steps: by taking C-filled mesoporous silica SBA-15(C@SBA-15) as an auxiliary template and silicon source, MgCl2.6H2O as a magnesium source, and NH4Cl, NH3.H2O and deionzed water as reaction mediums, carrying out hydrothermal reaction at a certain temperature for a certain period of time, so that mesoporous magnesium silicate is obtained, wherein in a hydrothermal reaction process, SiO2 in C@SBA-15 is taken as reactant to participate in reaction, C in C@SBA-15 can be used for supporting the mesopore wall, magnesium silicate generated by reaction coats the surface of C to form a shell layer, and the magnesium silicate shell layer is taken as the mesopore wall; carrying out high-temperature calcining on the hydrothermal reaction product for removing C to form a mesoporous passage so as to finally obtain the crystallized mesoporous magnesium silicate powder. The prepared mesoporous magnesium silicate powder has high degree of order, large aperture and specific surface area, high crystallinity and good stability.

The invention relates to a preparation method, a product and application of a rapid-subsidence organic flocculation adsorbent. In the method, the flocculation adsorbent is prepared by taking azodiisobutyronitrile as a polymerization initiator in a hydrous tetrahydrofuran reaction system through divinyl benzene and a water-soluble comonomer via crosslinking copolymerization. Polyelectrolyte chainsenriched on the surface of the product obtained through the method are capable of adsorbing electrifiedmacromolecular organic pollutants and colloids in flocculation water, and have certain mesoporousstructures and hydrophobicity to adsorb a part of low-molecular weight organic matters. In sewage treatment, the preparation method has the characteristics of being wide in application range, low indosage, rapid in sedimentation and the like.

The invention relates to a synthetic method of an MoS2/SnS nanometer heterojunction. The synthetic method comprises the following steps of 1) weighing ammonium molybdate ( (NH4)6Mo7O24.4H2O) and thiourea ((NH2)2CS), and respectively dissolving the ammonium molybdate ( (NH4)6Mo7O24.4H2O) and the thiourea ((NH2)2CS) into deionized water; 2) slowly dropwise adding an ammonium molybdate solution in a thiourea solution, and stirring to enable the ammonium molybdate solution and the thiourea solution to be uniformly mixed; 3) weighing a certain quantity of lysine, dissolving the lysine into the deionized water, pouring a dissolved solution in a mixed solution of the ammonium molybdate and the thiourea, regulating a pH value to be 4-5, stirring, moving the mixed solution into a reaction kettle, and keeping the temperature for a certain time under the hydrothermal condition with the temperature being 190-200 DEG C; 4) carrying out separation, washing and drying to obtain MoS2; 5) weighing SnCl2, dissolving the SnCl2 into a solvent, stirring, adding the MoS2 in the solvent, and continuously stirring; 6) weighing Na2S.9H2O, dissolving the Na2S.9H2O into the deionized water, dropwise adding a dissolved solution in a mixed solution of the MoS2 and the SnCl2, and stirring to carry out full reaction; and 7) carrying out separation, washing and drying on a reactant to obtain a final product. The synthetic method provided by the invention is simple in synthetic process; the product is high in chemical stability and large in specific surface area and has good visible-light catalytic performance.