74results about How to "Good channel structure" patented technology

The invention discloses a three-dimensional nitrogen-boron co-doped graphene aerogel preparation method, which comprises: (1) preparing graphene oxide by using an improved Hummers method; (2) preparing polyhydroxy boron nitride by using an atom substitution method; and (3) preparing a nitrogen-boron co-doped graphene hydrogel having a three-dimensional structure by using the graphene oxide as a substrate, by using the polyhydroxy boron nitride as a nitrogen source and a boron source through a solvothermal method, and carrying out freeze-drying to obtain the composite aerogel. Compared to the pure graphene gel, the composite material of the present invention has characteristics of large specific surface area and good pore channel structure.; and by doping the nitrogen atom and the boron atom, the material has the more active sites so as to provide wide application prospect.

A process for preparing asymmetric ultrafilter affinity polysulfone-chitosan membrane includes such steps as hydrolyzing the chloromethylated polysulfone as basic material in alkaline aqueous solution at 50-90 deg.C to obtain hydroxymethyl polysulfone membrane, and directly or indirectly reaction with the acidic aqueous solution of chitosan for coupling chitosan to obtain the target membrane. Its advantages are high hydrophilicity and mechanical strength, low non-specific adsorpativity, and ideal artery structure.

The invention relates to the field of functional materials, in particular to a porous polymer material with an ultra-high specific surface area, a preparation method thereof and use thereof in gas storage or liquid adsorption. The porous polymer material with an ultra-high specific surface area is poly(tetraphenylmethane) of which the molecular formula is (C(Ph)4)n and the structure is shown below.

Asymmetrical polysulfone ultrafiltering membrane is first prepared via phase transferring process using chloromethylated polysulfone as base material and is then hydrolyzed to activate and reacted directly or indirectly with hydroxyethyl cellulose solution to form the composite polysulfone-hydroxyethyl cellulose membrane. The preparation process is characterized by the hydrolysis in alkali water solution at 50-90 deg.c to produce hydroxymethyl polysulfone membrane. The prepared composite asymmetrical polysulfone-hydroxyethyl cellulose membrane has coupled hydroxyethyl cellulose amount up to 90-160 mg to each gram polysulfone membrane. The composite membrane has excellent hydrophilicity, low non-specific adsorption, high mechanical strength and ideal pore structure and may be used widely in affinity ultrafiltration.

The invention belongs to the crossing field of inorganic chemistry, organic chemistry and material chemistry, and specifically relates to an isomorphic porous rare-earth metal-organic framework material, a preparation method and application thereof in natural gas storage, particularly methane storage. In the structural formula of the rare-earth metal-organic framework material as shown below, RE3+ is one of Sc3+, Y3+, Yb3+ or Lu3+, and X is one of H, NH2, F, Cl, Br or I. The material has high thermal stability, excellent porous channel structure and good natural gas storage property, thus being capable of being widely applied to the automobile energy field.

The invention provides a nitrogen-doped carbon-based metal monoatomic catalyst as well as a preparation method and application thereof. A hard template method is selected to prepare the metal monoatomic catalyst, an amino-containing organic body and a chlorine-containing organic body are used as polymerization monomers, a transition metal salt is used as a metal source, a ratio relationship of a template, the organic monomers and the metal salt and reaction conditions are precisely regulated and controlled, so that in-situ polymerization of the organic monomers on the surface of the template and simultaneous chelating of transition metal ions can be realized to prepare the highly exposed monoatomic metal catalyst. The preparation method of the catalyst provided by the invention can ensurethe load capacity of the monoatomic metal to the greatest extent, and the condition that a nitrogen-doped carbon material wraps a metal oxide can be avoided through reasonable regulation and control of reparation conditions; and in addition, the Fenton catalyst prepared by the method has the advantages of high activity, a low metal loss rate and strong regeneration ability.

The invention provides a composite sintered filter element based on a geological material. The filter element consists of the following components in parts by mass: 20-80 parts of modified medical stone, 12-60 parts of modified zeolite, 5-20 parts of modified lava, 4-8 parts of china clay, 3-10 parts of corn starch granules and 2-5 parts of bentonite. The invention also provides a method for preparing the composite sintered filter element. The method comprises the following steps: dosing, mixing raw materials, molding and firing. According to the composite sintered filter element provided by the invention, the pollutants such as TN, TP, residual chlorine, rust, bacteria and heavy metals in the water body can be removed under the condition that the natural water molecule structure is not damaged, and specific elements beneficial to the human body are released.

The invention provides a geomaterial-based zeolite molecular sieve composite rectorite water purification ceramic which is composed of a main material and an auxiliary material, wherein the particle sizes of the main material and auxiliary material are respectively 220-1200 meshes. The main material is composed of the following components in parts by mass: 40-80 parts of modified rectorite, 12-60 parts of zeolite and 25-50 parts of modified kaolin. The auxiliary material is composed of the following components in parts by mass: 10-40 parts of talcum, 8-10 parts of alpha-Al2O3, 4-8 parts of argil, 8-15 parts of celestite, 15-30 parts of pore forming agent and 1-3 parts of diluter. The invention also provides a preparation method of the geomaterial-based zeolite molecular sieve composite rectorite water purification ceramic. The filter element prepared by the method can remove heavy metals, TN (total nitrogen), TP (total phosphorus), bacteria and other pollutants in the water body by utilizing the molecular sieving effect and cation exchange, and meanwhile, release specific elements which are beneficial to the human body.

The low concentration heavy metal removal method by sodium alginate embedding heat-activated activated sludge, which pertains to heavy metal waste water disposal method, comprises the following steppes: treating the activated sludge from municipal sewage plant with scouring, centrifugal separation and drying under pressurization to deactivate it; embedding it with sodium alginate(CaCl2) to get immobilization calcium alginate ball(CA); filling fixed reactor with CA in certain density; continuously treating low concentration waste water containing mixing heavy metal such as Cd2+, Pb2+, Cu2+ and Zn2+; and selectively washing CA ball by hydrochloric acid to get mixing heavy metal adsorbed on CA ball. Heavy metal is retained while sorbent material revived to reuse. The invention has the advantages of high efficiency and economical and practical property.

The invention discloses a preparation method of an octahedron-shaped cobaltosic oxide anode material for a lithium ion battery. During the preparation process of such a sample, the octahedron-shaped cobaltosic oxide anode material with a porous structure is obtained by using a soft-template-assisted sol-gel method. Such the cobaltosic oxide sample with the internal tunnel structure and the unique octahedron morphology is capable of improving infiltration capability of an electrolyte and buffering volume change during the discharging/charging process of lithium ions, and has higher lithium storage capacity and good cycle stability. The preparation method has the advantages of mild reaction conditions, simplicity and controllability, easy quantity production.

The invention relates to an N-doped porous carbon loaded Fe2O3 composite material and a preparation method thereof. The composite material is prepared in the following steps: preparing a crosslinkingcomplex of 4-vinylpyridine (a monomer or a polymer) and FeCl3.6H2O; putting the crosslinking complex into a tube furnace for high-temperature carbonization-activation; naturally cooling to obtain a carbonization product; finally, taking out the carbonization product, and washing and filtering the carbonization product, so as to obtain the N-doped porous carbon loaded Fe2O3 composite material. According to the simple method, Fe2O3 nanoclusters are embedded into a N-doped porous carbon skeleton, so that the dispersity and the stability of the Fe2O3 nanoclusters can be effectively improved; an N-doped porous carbon carrier is large in specific surface area and excellent in porous structure, and the reactivity and the biocompatibility of the Fe2O3 nanoclusters can be effectively improved due to the doping of nitrogen atoms; the loaded Fe2O3 nanoclusters are uniform in dimension and controllable in size. The N-doped porous carbon loaded Fe2O3 composite material has extensive application prospect in the fields of magnetism, sensing, energy storage and conversion, catalyzing and the like.

The invention discloses a method for removing dye pollutants by utilizing a silver chromate/sulfur-doped carbon nitride Z-shaped photocatalyst. According to the method, the silver chromate/sulfur-doped carbon nitride Z-shaped photocatalyst is utilized to catalytically treat the dye pollutants, wherein the silver chromate/sulfur-doped carbon nitride Z-shaped photocatalyst comprises carbon nitride,sulfur-doped carbon nitride is formed by doping sulfur elements into the carbon nitride and the surface of the sulfur-doped carbon nitride is modified with silver chromate. According to the invention,the dye pollutants can be degraded into carbon dioxide and water, in the manner of adopting the silver chromate/sulfur-doped carbon nitride Z-shaped photocatalyst for catalytically treating the dye pollutants, so as to realize the effective removal of the dye pollutants. The method disclosed by the invention has the advantages of simple process, convenience in operation, high treating efficiency,excellent removing effect, and the like, has high application value and wide application scope and is suitable for large-scale application.

The invention discloses a synthetic method of a sepiolite/nano TiO2 composite material. According to the method, sepiolite and tetrabutyl titanate are taken as raw materials, and the sepiolite/nano TiO2 composite material is synthesized with an in-situ polymerization method. The method comprises the steps as follows: 1), the sepiolite, the tetrabutyl titanate and ethyl alcohol are mixed, stirred, dissolved and subjected to ultrasonic dispersion; 2), the temperature is raised gradually until the ethyl alcohol is volatilized thoroughly, hydrochloric acid and water are added, heating is performed continuously, and the water is volatilized, so that a dried solid is obtained; and 3), the dried solid is washed for a plurality of times and then heated and dried, a dried component is obtained, then the dried component is calcined, and powder, namely, the sepiolite/nano TiO2 composite material, is obtained. With the adoption of the method, the composite material which has a good formaldehyde-removing function can be prepared.

The invention relates to a soil remediation agent, a soil remediation material and a preparation method. The soil remediation agent is prepared from the following raw materials: biomass charcoal, vermiculite, zeolite, pyrite cinder, attapulgite powder, fulvate, ammonium carbonate and an additive. According to the soil remediation agent, through reaction of the biomass charcoal and the pyrite cinder, iron in the pyrite cinder is reduced, Fe < 3 + > and Fe < 2 + > can exchange with Si < 4 + > in zeolite, vermiculite and attapulgite powder, and therefore the cation exchange capacity of the obtained soil remediation agent is improved; moreover, the soil remediation agent can load more nutrient substances, the additive can be slowly released, and the soil remediation material prepared from thesoil remediation agent can effectively improve the air permeability and the water retention rate of soil.

The invention provides a chestnut shell-based biomass carbon material as well as a preparation method and application thereof, and belongs to the technical field of carbon materials. The method comprises the following steps: firstly, reacting chestnut shell powder with an organic acid by adopting a hydrothermal method to obtain a hydrothermal carbon material; then putting the hydrothermal carbon material into an alkaline solution, conducting full stirring, standing, filtering and freeze-drying to obtain a dried carbon material; reacting the carbon material in an inert atmosphere to obtain a pre-product; and finally, soaking the pre-product with an inorganic strong acid, and conducting washing with water until the pre-product is neutral to obtain the chestnut shell-based biomass carbon material. The chestnut shell-based biomass carbon material has good pore structure and capacitive performance, is applied to an electrode material of a capacitive deionization technology to remove toxic heavy metals, and can effectively improve the removal rate.

The invention discloses a porous ionic polymer heterogeneous catalyst and a method for catalytically synthesizing N-formamide by using the porous ionic polymer heterogeneous catalyst, and provides a method for preparing an N-formamide compound by using the porous ionic polymer catalyst as a heterogeneous catalyst to catalyze carbon dioxide, organic amine and hydrogen-containing silane epoxide to carry out N-formylation reaction. The preparation method is green, environment-friendly, simple, efficient and low in raw material cost; the catalyst has an excellent pore channel structure, good physical and chemical stability, strong carbon dioxide enrichment capability and highly dispersed ionic liquid active centers; the catalyst is simple and efficient in technological process, very mild in condition and safe to operate; no organic solvent or additive is added in the catalytic reaction process so that the catalyst is environment-friendly; low-concentration carbon dioxide can be directly used as a raw material so that the cost and the energy consumption for obtaining high-purity carbon dioxide are reduced; the product separation and purification process is simple, the catalyst is easy to recover and has good stability, and repeated recycling can be achieved.