109results about How to "Rich porous structure" patented technology

A preparation method for a combined modified straw active particulate carbon adsorption material and use of same. The preparation method for the combined modified straw active particulate carbon adsorption material comprises the following steps: 1) mixing straw powders, distilled water, a binder and a composite mineral, then pelletizing same, and then placing same in a tube furnace for pyrolysis to prepare straw particulate carbon; 2) introducing an inert gas into a modification reagent, adjusting the pH value combined and 3) soaking the straw particulate carbon into the combined modification solution for 30 min, and performing cleaning and drying, so as to obtain a combined modified straw active particulate carbon adsorption material. The combined modified straw active particulate carbon has a good adsorption effect on phosphate group in low-pollution water.

The invention discloses a method for synthesizing a porous microsphere material containing NaY zeolite by a waste FCC (fluid catalytic cracking) catalyst, which is a catalytic cracking process. The method is characterized by comprising the following steps: A. adding water and hydrochloric acid to the waste FCC catalyst for mixing slurry and acidizing to obtain catalyst microspheres; B. mixing thecatalyst microspheres with one or a combination of natural kaolin and roasted kaolin, adding water to obtain slurry containing 30-50% of solid, adding a functional agent to the slurry and then forming dried microspheres through spray drying, and roasting the dried microspheres at the temperature of 700-1100 DEG C for 0.5-10 hours to obtain roasted microspheres; and C. adding sodium silicate, a zeolite directing agent and alkali liquor to the catalyst microspheres and/or the roasted microspheres, adding the obtained mixed solution to a crystallization reaction kettle, performing hydrothermal crystallization at the temperature of 85-120 DEG C for 10-30 hours, filtering out a mother liquid, washing the obtained filter cake with deionized water, and then drying to finally obtain the finished product. The method is mainly used for synthesizing the porous microsphere material containing the NaY zeolite.

The invention provides a preparation method of a porous graphene/carbon nano tube lithium sulfur anode material. The method comprises the steps of introducing silicon dioxide microspheres as a template, mixing with a carbon nano tube dispersion liquid, dropwise adding a sodium ascorbate solution, using hydrofluoric acid for soaking for 5 to 7 days, and obtaining a porous graphene/carbon nano tube;grinding with a sulfur elementary substance, using a hydrothermal reaction kettle for heating for 10 to 15h at 140 to 160 DEG C under the argon protection, and obtaining a sulfur/porous graphene/carbon nano tube. The material prepared by the invention adopts the porous graphite/carbon nano tube composite material as a frame so as to form a three-dimensional conductive network structure, so that sulfur can be stored, and a battery performance is improved.

The invention provides a surface modification method of carbon cloth for supercapacitor electrodes. The method includes the steps that firstly, inorganic salt is dissolved in distilled water to form a uniform inorganic salt solution, the carbon cloth is immersed into the inorganic salt solution several times, the carbon cloth is taken out and put into a drying oven for drying and recrystallization, and a product A is obtained; secondly, the product A is put into a tube furnace for high-temperature calcination, cleaning is carried out with distilled water to remove inorganic salt, drying is carried out, and surface-modified carbon cloth is obtained. According to the method, the solution immersion and recrystallization method is adopted, metal salt is recrystallized on the surface of the carbon cloth with the thermal evaporation method, the purposes of activation and pore formation can be synchronously achieved in the high-temperature carbonization process, the surface activity and roughness of CF are improved, and activated CF has a large specific area and rich porous structures; the method is environmentally friendly, conditions are mild, surface modification and oxidation of CF are uniform, the oxidation effect is excellent, and thus CF has good electrochemical performance when directly serving as a flexible electrode material.

The invention discloses a preparation method of a visible-light response carbon-doped nano-titanium dioxide catalyst. The preparation method includes the following steps: dissolving a titanium-containing compound in an alcohol solution to obtain a solution A; mixing an alkali solution with an alcohol solution to obtain a solution B; dropwise adding the solution B to the solution A, stirring for 30-60 min, and then carrying out a reaction for 6-24 h at the temperature of 50-70 DEG C, to obtain a white gel; and drying the obtained white gel for 10-24 h at the temperature of 80-120 DEG C, grinding into a powder, washing the powder with an alcohol solution or deionized water, then drying, calcining the obtained powder with the calcination temperature of 200-600 DEG C and the time of 1-10 h, and thus obtaining the carbon-doped titanium dioxide visible light catalyst. Raw materials used in the preparation method have no need of precious metals, has no need of aging, has no additional addition of a carbon source and no addition of water, the cost and time are saved, the preparation technology is simple, and the requirements on equipment are not high.

The invention discloses a red mud fly ash system low-temperature flue gas desulfurization and denitrification absorbent and a preparation method thereof. The red mud fly ash system low-temperature flue gas desulfurization and denitrification absorbent is mainly prepared by mixing and stirring solid waste fly ash, red mud and quick lime according to a certain proportion, and after series reaction molding is performed, the calcining, cooling, crushing and sieving are performed to prepare the absorbent. Solid waste the red mud and the fly ash are used as main raw materials of the absorbent, low-temperature flue gas can be desulfurized and denitrified at the same time, and the removal efficiency is high. Meanwhile, the absorbent provided by the invention is strong in alkalinity, rich in raw material source, easy to purchase and low in cost, and the treatment of wastes with wastes is achieved. The preparation process of the absorbent is simple, the wastes are turned into wealth, meanwhile,the absorbent absorbing acid waste gas in flue gas can be further recycled, secondary pollution is avoided, and the absorbent is suitable for industrial application and popularization.

The invention discloses a nitrogen-containing carbon material for a supercapacitor as well as a preparation method and application thereof, and belongs to the technical field of supercapacitor material preparation. The preparation method comprises the following steps: carrying out hydrothermal reaction on filtrate obtained by reacting domestic sludge with a co-reaction substance and ash-free biomass twice to obtain a solid nitrogen-containing carbon product, and reacting the nitrogen-containing carbon product with an activator in an inert atmosphere to obtain a nitrogen-containing carbon activated product; and carrying out certain pretreatment on the nitrogen-containing carbon activation product to obtain the nitrogen-containing carbon material. The nitrogen-containing carbon material forthe supercapacitor prepared by the preparation method has the characteristics of large specific surface area and high specific capacitance. The invention further discloses application of the nitrogen-containing carbon material for the supercapacitor in preparation of supercapacitor electrode materials. The supercapacitor electrode is prepared by mixing a nitrogen-containing carbon material for a supercapacitor, conductive acetylene black and a PVDF binder and tabletting. The supercapacitor electrode material prepared by the method has excellent rate capability and cycling stability.

The invention discloses a preparation method and application of a metal organic framework carbon fiber composite film. The method comprises the steps of (1) dissolving a high molecular polymer in a solvent as a spinning solution and stirring at the temperature of 40 to 85 DEG C for 10 to 30 hours to fully dissolving the high molecular polymer to obtain a solution A, (2) performing electrostatic spinning on the solution A to obtain a polymer nanofiber film, pre-oxidizing the polymer nanofiber film, sintering the polymer nanofiber film in an inert gas, and drying to obtain a CNF film, (3) placing the CNF film obtained in step (2) in a mixed gas of ozone and oxygen to form a functionalized CNF film, and (4) placing the functionalized CNF film in a metal salt solution, then placing the functionalized CNF film in an organic ligand solution, washing and drying, and forming a MOF/CNF composite film after a certain number of cycles. The MOF/CNF composite film provided by the invention is prepared by an electrostatic spinning method and has the characteristics of easy obtainment of raw materials, low price, and easy mass production.

The invention discloses a graphene mask fabric and a preparation method thereof, belonging to the technical field of mask base fabrics. The biomass graphene mask fabric prepared by using the preparation method provided by the invention comprises an inner layer, a middle layer and an outer layer, wherein the inner layer is a liquid storage layer; the middle layer is a graphene fiber layer; and theouter layer is an anti-seepage layer. According to the invention, with natural corncob as a raw material, the graphene fiber layer with rich porous structure and ultrahigh adsorption force is preparedby adopting a group coordination and assembly carbon precipitation method; and the anti-seepage layer is constituted by chitosan fiber and polylactic acid. The graphene mask fabric provided by the invention solves the problems of weak adsorption ability to residual dust and cosmetics on a face part and poor bacteriostatic effect for a conventional mask base fabric.

The embodiment of the invention relates to the field of synthesis of inorganic nano functional materials, in particular to a one-dimensional metal oxide/carbide composite material and a preparation method thereof. The invention provides a preparation method of a one-dimensional metal oxide/carbide composite material. The preparation method comprises the following steps: calcining a one-dimensionalmetal organic framework material, wherein the calcining temperature is 200 to 600 DEG C. According to the preparation method provided by the invention, the one-dimensional metal organic framework material is used as a precursor for the first time, and the one-dimensional metal oxide/carbide composite material can be obtained through one-step calcination pyrolysis; the obtained one-dimensional metal oxide/carbide composite material still maintains good one-dimensional morphology and has a large specific surface area, high dispersity, more exposed active sites and good conductivity; the preparation method is simple, low in energy consumption, low in raw material cost and easy for large-scale production.

The invention discloses a high-temperature-resistant anti-rutting asphalt mixture and a preparation method thereof. The asphalt mixture is prepared from, by weight, 15-18 parts of pretreated asphalt,30-35 parts of zinc chloride, 5-10 parts of a heat conduction material, 8-12 parts of glass fibers, 5-10 parts of an admixture and 90-100 parts of an aggregate. The pretreated asphalt is prepared fromthe following raw materials by weight: 8 to 14 parts of modified asphalt, 6 to 8 parts of dihydroxyl-terminated polydimethylsiloxane, 14 to 16 parts of polycaprolactone glycol, 2 to 4 parts of 1,6-hexamethylene diisocyanate, 0.5 to 1 part of dibutyltin dilaurate, 4 to 6 parts of 4,4'-dimethyl-2,2'-dipyridyl and 0.5 to 0.8 part of 1,4-butanediol. The asphalt mixture is reasonable in process designand proper in component proportion, the prepared asphalt mixture has excellent anti-rutting capacity, the high-temperature stability and the water stability of the asphalt mixture are improved, and the asphalt mixture can be applied to roads with large traffic volume and more heavy-load and overload vehicles and has higher practicability.

The invention relates to the technical field of electrochemical analysis and detection, in particular to a modified glassy carbon electrode for detecting dopamine and adrenaline simultaneously, a preparation method and application thereof. The electrode has advantages of large specific surface area, high catalytic activity, and high electrical conductivity and is capable of measuring the dopamine and adrenaline simultaneously and distinguishing potentials accurately. The modified glassy carbon electrode comprises a glassy carbon electrode and a composite coating; and the composite coating is wrapped on the surface of the glassy carbon electrode and is formed by composition of graphene oxide and tetrabromofluorescein. In addition, the preparation method comprises the following steps: (1), preparing a tetrabromofluorescein solution; (2), preparing a graphene oxide dispersion solution; and (3), making a modified electrode. Besides, the application includes: S1, establishing a concentration-electrochemical response signal relationship; S2, measuring the concentration of a to-be-detected substance.

The invention relates to a catalyst for low-temperature efficient treatment of VOCs and a preparation method of the catalyst, and belongs to the technical field of chemical catalysts. According to the catalyst, nano noble metal particles are dispersed on a porous carrier; the loading capacity of the noble metal is 0.02-0.5 wt%; the noble metal is selected from at least one of gold, platinum, rhodium, palladium, ruthenium or silver; and the carrier is selected from at least one of oxides of nickel, zirconium, manganese, zinc, cobalt or iron. The prepared catalyst is a porous material and has a rich porous structure, the used raw materials are cheap and easy to obtain, and the loading amount of precious metal is low; and the preparation process is simple and easy for industrial production. The prepared catalyst has the advantages of being high in low-temperature activity, resistant to high-temperature roasting, good in stability, free of secondary pollution, wide in application range, free of special activating treatment and the like.

The invention provides a preparation method of a porous graphitized hollow carbon microsphere, belonging to the field of preparation of porous carbon materials. According to the method, a soluble organic matter is used as a carbon precursor, potassium-iron double salt is used as a catalyst, and a hollow microsphere structure is formed through self-assembly by utilizing a chelating effect between hydroxyl oxygen and metal ions in an organic matter; in the carbonization process, based on the confinement and shape selection effects of uniformly-dispersed iron particles and the activation effect of potassium, graphitization and activation are realized at the same time; and finally, the porous graphitized hollow carbon microsphere with uniformly distributed graphitized structures is obtained. Compared with a technology for preparing the hollow carbon microsphere by adopting a template method, the method of self-assembling of an organic compound and metal ions in the invention has the advantages that the method is simple, cost is relatively low, and the obtained hollow carbon microsphere has high specific surface area and relatively high graphitization degree, and has huge application prospects in the fields of energy storage, catalysis, adsorption and the like.

The invention discloses a method for preparing a three-dimensional porous graphene sheet by adopting a low-temperature double-salt compound and application, and aims to solve the problem of preparing the graphene sheet at low temperature. Compared with a traditional chemical or physical pore-forming method, the method has the advantages that the pore size distribution and the graphitization degree can be controlled at low temperature; and coconut shells are used as a biomass charcoal source, K2CO3 and Na2CO3 are used as activators, and the activation temperature is reduced by using a double-salt melting process. The activation process is intervened by gas (CO), K and Na released in the heating process, so that cross-linked sp3 carbon atoms in the hard carbon phase release graphite microcrystals, then the graphite microcrystals are recrystallized to form a graphene layer, and finally the unique three-dimensional porous graphene sheet is formed. According to the method, the energy consumption is reduced, large-scale production can be realized, and a scheme is provided for other biomass derived graphitized carbon.

The invention provides a biochar prepared from facility agriculture wastes, a preparation method of the biochar, a soilless culture substrate and application of the soilless culture substrate, and belongs to the technical field of crop cultivation. The method for preparing the biochar from facility agriculture wastes comprises the following steps that the facility agriculture wastes are crushed and are then subjected to cracking for 3 to 4 h at 300 DEG C to 500 DEG C under the oxygen-free condition; and obtained cracking products are crushed to obtain the biochar. The prepared biochar containsrich porous structures and nutritional ingredients including rapidly available potassium, rapidly available phosphorus, rapidly available nitrogen, organic matters and salts; and the pH is alkaline,so that sufficient ventilation pores and nutrients are provided for crop growth. The invention also provides a vegetable soilless culture substrate containing the biochar. Compared with an existing soilless culture substrate, the vegetable soilless culture substrate provided by the invention has the advantages that the cucumber yield can be stably improved; the cyclic utilization of facility agriculture production wastes such as straws can also be realized; and carbon sequestration, emission reduction and green development are promoted.

The invention discloses a highway composite acoustic panel material and a preparation method thereof, and relates to the field of acoustic panels. The highway composite acoustic panel material is prepared from the following raw materials in parts by weight: 20-30 parts of waste polypropylene plastic particles, 8-15 parts of polypropylene, 8-15 parts of vinyl-vinyl acetate copolymer, 6-12 parts ofglass bead, 15-20 parts of expanded perlite, 5-10 parts of mica powder, 4-8 parts of fiberglass, 3-6 parts of nano titanium dioxide, 3-6 parts of nano silicon nitride, 10-18 parts of lignocellulose, 3-5 parts of hydroxymethyl cellulose, 2.5-3.6 parts of silane coupling agent, 1.8-3.5 parts of antioxidant and 2.8-4.2 parts of flame retardant. The acoustic panel material is prepared by taking the waste polypropylene plastic particles as a main raw material, the waste is recycled, the production cost is low, the material is excellent in flame resistance, corrosion resistance, water resistance andsound insulation property, and the preparation method is simple.

The invention discloses a preparation method of biological calcium composite super absorbent resin and belongs to the technical field of organic-inorganic composite hydrogel. Fish processing wastes such as shrimps, crabs, shells and fish bones are simply washed, dried and crushed to obtain biological mineralized calcium powder; biological macromolecules extracted from agriculture, forestry, fishery and animal husbandry industry production side products are used as a macromolecular main chain; by being initiated by an initiator, the macromolecular main chain is copolymerized with hydrophilic monomer acrylic acid to prepare biological polymer based super absorbent resin; in the preparation process, the biological polymer based super absorbent resin is compounded with the treated biological calcium powder; through chemical reaction between the biological calcium and the acrylic acid, a porous structure is generated; and by using anhydrous low carbon alcohol to directly dehydrate pre-swelling and frozen composite hydrogel, physically modified porous biological calcium composite super absorbent resin is obtained. The preparation method of the biological calcium composite super absorbentresin, disclosed by the invention, has the advantages that carapace resources and biomass resources can be sufficiently utilized to be beneficial for saving energy; and moreover, the prepared resin possesses good water absorbing performance, water retention capacity and thermal stability.

The invention discloses a preparation method for a nitrogen-containing hierarchical porous carbon nano tube film. According to the preparation method, the nitrogen-containing hierarchical porous carbon nano tube film is prepared by taking a high-molecular polymer nanofiber membrane containing metal salt as a template and taking metal organic frameworks as a carbon source. The preparation method issimple and has the advantages that the prepared nitrogen-containing hierarchical porous carbon nano tube film has self-supporting characteristics and can be directly used as a positive electrode of alithium-air battery, the adverse effect of an adhesive on the performance of the battery is eliminated, meanwhile, the specific discharge capacity and the cycling stability are high, in addition, themass transfer performance is greatly improved, the pore passage utilization rate is greatly increased, the preparation performance is excellent, a process is simple, the process repeatability is good, the cost is low, the environment is protected, and the like.