14results about How to "Many pores" patented technology

The application discloses a preparation method of polyurea porous material with flower cluster structure and application thereof. The material prepared by the application is a flower cluster porous polyurea material prepared by a self-assembly reaction in a mixed solvent of acetone and water, with hexamethylene diisocyanate as a reaction monomer. Nucleophilic addition reaction occurs between isocyanate groups and water molecules to generate a urethane intermediate, the intermediate rapidly decomposes to release CO2 gas and generate an amine group; the newly generated amine group immediately reacts with the remaining isocyanate groups in the system to form a polyurea oligomer, and then self-assembles into a flower cluster porous structure. The polyurea flower cluster structure has a high specific surface area, rich pores and controllable surface chemical properties, is an ideal material as an adsorbent, and can effectively capture dye molecules in a solution. The application solves the key technical problems of low adsorption capacity and poor selectivity of traditional adsorption materials in dye wastewater treatment.

This invention belongs to the field of photocatalyst materials technology, specifically relating to a three-dimensional graphene aerogel photo-self-propelled Fenton catalyst, its preparation method, and its application. The preparation method includes: mixing a graphene dispersion containing ethylenediamine with a phenolic resin prepolymer containing ferrocene, phenols, and an alkaline catalyst; followed by a one-step hydrothermal reaction, washing, and freeze-drying to obtain the three-dimensional graphene aerogel photo-self-propelled Fenton catalyst. This catalyst can be used to degrade organic pollutants in water under visible light irradiation.

The application relates to the technical field of catalyst materials, in particular to a preparation method and application of a catalyst for synthesizing dimethyl carbonate from carbon dioxide and methanol; the method comprises the following steps: A, poloxamer is configured into a solution, HAc, NaClO4 and 1,3,5-trimethylbenzene are added into the solution and uniformly mixed to obtain a mixture; B, (NH4)2Ce(NO3)6 and H2BDC are added into the mixed solution in step A, the obtained solid after reaction is centrifugally separated, washed, soaked and dried to obtain a primary product, and finally the catalyst is obtained through calcination; in the application, HF-UiO-66 is synthesized by taking F127 as a template agent and taking 1,3,5-trimethylbenzene (TMB) as an expanding agent; the derivative HF-CeO2 catalyst with different TMB adding amounts is prepared through calcination; the adding of the expanding agent greatly increases the specific surface area of the catalyst, the CeO2 crystal grains generated through calcination are small, the number of acid-base sites is greatly increased, and therefore the catalyst has the largest catalytic activity, and the DMC yield reaches 12.02 mmol DMC / g cat .

This invention discloses an aminoindole derivative-based porous polymer, its preparation method, and its application, belonging to the field of dye adsorbent technology. The preparation method is as follows: 2-phenylindole is dissolved in acetic acid, and sodium nitrite aqueous solution is added dropwise. The system is then stirred and reacted at low temperature. After the reaction, the precipitate is collected and dried to obtain product 1. Product 1 is dissolved in ethanol, and NaOH solution is slowly added dropwise while stirring and mixing. Na2S2O4 is added, and the reaction is stirred under heating conditions. After the reaction, the precipitate is collected and dried to obtain product 2. Product 2, 1,2-dichloroethane, and dimethoxymethane are stirred and mixed. A catalyst is added, and the reaction is stirred and reacted under heating conditions. After the reaction, the precipitate is collected, washed, and dried to obtain the final product. The aminoindole derivative-based porous polymer of this application has high specific surface area, high adsorption rate, and high adsorption capacity, effectively solving the problems existing in the prior art.

The application relates to a method for rapidly preparing a porous Cu / Zn heterojunction electrocatalytic material and application. The method utilizes a dynamic hydrogen bubble template method to prepare the heterojunction electrocatalytic material, and the preparation is carried out under the condition of a higher cathode deposition current. The specific steps are as follows: firstly, copper sulfate, zinc sulfate and ammonium sulfate are dissolved in deionized water according to a certain ratio to serve as an electrodeposition solution. The electrodeposition is carried out at room temperature, the deposition condition is controlled by using a direct current power supply, a hydrophilic carbon paper is used as a substrate electrode, and the porous Cu / Zn heterojunction material is deposited for 30 seconds under the condition of a deposition current of-1.0 A. The preparation scheme can realize in-situ rapid preparation of the porous material, the loading is uniform and stable, the operation process of a relatively cumbersome hard template method is avoided, and the electrocatalytic carbon dioxide reduction preparation carbon monoxide performance is very high.

The application belongs to the technical field of MOF membrane and specifically relates to a Cu-BTC / cellulose composite-based MOF membrane and a preparation method thereof. After Cu-BTC / cellulose composite material is prepared by coating microcrystalline cellulose with Cu-BTC, the Cu-BTC / cellulose composite material is mixed with a membrane preparation mother liquor, a pore preparation agent and a homogeneous membrane material to form a homogeneous casting solution, and then the Cu-BTC / cellulose composite-based MOF membrane is prepared after coating, winding, solidification and drying. The Cu-BTC / cellulose composite material prepared by the application has a sub-micron rough surface and an elongated fibrous structure, and the MOF membrane prepared therefrom has more abundant pore and channel structures, which is beneficial to increasing the accessibility of active sites and greatly improving the gas permeability and gas separation performance of the membrane.

The invention provides an acellular matrix fiber woven scaffold as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The acellular matrix fiber woven scaffold comprises a woven structure unit, wherein the woven structure unit comprises warp yarns and a plurality of acellular matrix fiber weft yarns; the acellular matrix fiber is prepared by cutting an acellular matrix paper-based material at equal intervals; the plurality of acellular matrix fiber wefts are arranged in parallel according to a bionic trend and are interwoven and fixed through the warps, so that a bionic pattern simulating natural tissue fiber arrangement is formed in the weaving structure unit. The acellular matrix fiber scaffold is prepared by innovatively applying a weaving technology, the scaffold can improve the cell loading efficiency, is beneficial to self-repair and reconstruction of damaged tissues, provides suitable survival and growth conditions for cells, and has good application prospects in the field of biomedical engineering, especially in the aspects of tissue repair and regenerative medicine. And huge application potential is shown.

The application discloses a preparation method of light water treatment granular material, and belongs to the field of water pollution purification material. The light water treatment granular material is prepared through preparation of titanium-zinc-calcium sol and granular shaping process, and the granular material has the characteristics of low density, rich porosity and stable structure, and is suitable for purifying and treating organic contaminated wastewater. Meanwhile, the granular material has a large adsorption capacity for organic pollutants in wastewater, and can spontaneously decompose the adsorbed organic pollutants, so that the granular material can not only quickly remove the organic pollutants from the wastewater, but also has a self-purification capacity, and is suitable for long-term stable and large-scale wastewater treatment process.

The invention belongs to the technical field of new materials, and particularly relates to preparation and doping modification of rare earth oxide loaded transition metal nanoparticles for low-pressure ammonia synthesis. The supported synthetic ammonia catalyst provided by the invention comprises a cerium dioxide carrier (CeO2) with characteristic morphology and rich oxygen vacancies, a lanthanum-doped and modified cerium dioxide carrier (La-CeO2), and a metal nano-material which is supported on a rare earth metal oxide carrier and is generated through high-temperature gas phase reduction, the preparation method comprises the following steps: dissolving rare earth metal nitrate and an organic ligand in N-N dimethylformamide, then adding an initiator and a stabilizer, putting an obtained mixed solution into a hydrothermal kettle, and carrying out solvothermal reaction at high temperature; the preparation method comprises the following steps: centrifuging, washing, drying and calcining a metal organic framework precursor obtained by solvothermal reaction to prepare a rare earth metal oxide carrier, and loading transition metal chloride on the rare earth metal oxide carrier by taking acetone as a solvent through a rotary evaporation method; and performing high-temperature treatment in a reducing atmosphere to obtain the transition metal nanoparticle loaded rare earth metal oxide ammonia synthesis catalyst. The supported ammonia synthesis catalyst has very strong nitrogen activation capability and very high low-pressure ammonia synthesis performance.

This invention discloses a CuO-CeO 2 / ZrO 2 The application of supported catalysts in the transesterification process to prepare organic carbonates, wherein the organic carbonate is one of dimethyl carbonate, diethyl carbonate, diisopropyl carbonate, and di-n-pentyl carbonate. The specific application process involves using alcohols and ethylene carbonate as raw materials, in a CuO-CeO... 2 / ZrO 2 Organic carbonates are prepared by transesterification at 90-180℃ under the action of a supported catalyst; the alcohol is one of methanol, ethanol, isopropanol, and n-pentanol; the molar ratio of the alcohol to ethylene carbonate is (6-11):1. CuO-CeO 2 / ZrO 2 Supported catalysts exhibit excellent catalytic activity and stability, higher DMC selectivity, and higher DMC yield when used in transesterification to prepare organic carbonates.

This invention relates to a magnesium-based composite hydrogen storage material regulated by UiO-66, its preparation method, and its application. The high-performance magnesium-based composite hydrogen storage material provided comprises MgH2 and UiO-66, wherein MgH2 powder is the main phase, and UiO-66 is a high-temperature resistant metal-organic framework (MOF) composed of Zr, O, and C, possessing a large specific surface area and ultra-high structural stability, and plays a catalytic role. It is synthesized by hydrothermal and calcination methods. Compared with existing technologies, the magnesium-based composite hydrogen storage material provided by this invention has a dehydrogenation temperature range of 180 ℃–271 ℃ and a dehydrogenation activation energy as low as 69.26 kJ / mol. ‑1 It also possesses rapid room-temperature hydrogen absorption capacity and excellent circulating hydrogen storage performance, which is of great significance for promoting the application of MgH2 and improving its hydrogen storage performance.

This invention discloses a Pt-ultrashort carbon nanotube composite catalyst powder, its preparation method, and a fuel cell membrane electrode assembly, belonging to the field of fuel cell technology. The composite catalyst powder comprises Pt or Pt alloy nanoparticles, and multi-walled carbon nanotubes formed by in-situ induced growth of the Pt or Pt alloy nanoparticles, wherein the average length of the multi-walled carbon nanotubes is 50-200 nm. The composite catalyst powder can be mixed with proton-conducting ionomers and a dispersion medium to form a catalyst slurry, which can be used to prepare fuel cell catalyst layers and membrane electrode assemblies. By allowing Pt or Pt alloy nanoparticles to exist prior to carbon nanotubes and inducing in-situ growth of carbon nanotubes, this invention improves the bonding stability between Pt particles and the carbon support, the dispersibility of the catalyst slurry, and the discharge performance of the membrane electrode assembly in high current density regions.

The present application relates to a kind of fluorescent sensing unit, array and its preparation method, wherein the preparation method of unit includes dissolving terbium chloride hexahydrate, 2-amino terephthalic acid and 1,10-phenanthroline and adding sodium hydroxide solution to obtain metal organic framework fluorescent powder by heating;Dissolve citric acid, urea into N,N-dimethylformamide and heat, mix with potassium hydroxide solution, dry to obtain fluorescent carbon quantum dots;Metal organic framework fluorescent powder is mixed with fluorescent carbon quantum dots in ethanol solution, to obtain fluorescent sensing mixed solution, then obtain fluorescent sensing film forming liquid, after being made into film, trimming obtains fluorescent sensing unit.The fluorescent sensing array can respond color change according to the TVB-N released by fish meat spoilage that fluorescent sensing unit can produce, so the current TVB-N concentration of fish meat can be judged according to the color change of fluorescent sensing unit.

The present application belongs to the technical field of saline soil slope protection, and relates to an ecological slope protection structure of soybean enzyme-vegetation-anti-slide pile combined reinforcement of saline soil slope and a construction method thereof. The ecological slope protection structure comprises a vegetation layer, a soybean enzyme solidified coarse particle layer, a vegetation base layer, a soybean enzyme solidified fine particle layer, a gravel layer, an anti-slide pile and a saline soil slope body. The anti-slide pile passes through the soybean enzyme solidified coarse particle layer, the vegetation base layer and the soybean enzyme solidified fine particle layer from top to bottom in sequence, and is longitudinally embedded in the bearing layer of the saline soil slope body. The vegetation layer is formed by sowing plant seeds on the surface of the soybean enzyme solidified coarse particle layer and the growth of the plant seeds in the vegetation base layer. The anti-slide pile is nested with each soil layer, and is supplemented by the anchoring effect of the vegetation roots to form an overall frame structure slope protection system. The present application provides a saline soil slope ecological slope protection structure with reasonable structural mechanical properties, good integrity, impermeability, salt isolation capacity and conformity with the ecological development concept.