368 results about "Large pore size" patented technology

The invention discloses a lithium battery diaphragm with a gradient pore structure and a preparation method thereof, the lithium battery diaphragm with the gradient pore structure is of a layered structure, the layered structure comprises a base membrane, a first coating and a second coating, the first coating and the second coating are located on the same side of the base membrane, the first coating is connected with one side of the base membrane, and the second coating is connected with the other side of the base membrane. The second coating is connected with the first coating, the porosity of the first coating is 40-50%, the porosity of the second coating is 30-40%, the first coating comprises large-aperture porous alumina, and the second coating comprises small-aperture porous alumina. A double-layer structural design is adopted, and the two coatings have different pore diameters, so that a gradient pore diameter structure is formed. The structure can realize gradual adaptation of ions in the charging and discharging process of the battery and reduce migration energy obstacles.

The invention discloses a large-aperture aluminum oxide loaded copper-based catalyst as well as preparation and application thereof. The large-aperture alumina-loaded copper-based catalyst comprises a large-aperture alumina carrier, and copper oxide and lanthanum oxide loaded on the surface of the large-aperture alumina carrier, the large-aperture alumina-loaded copper-based catalyst is granular, the specific surface area is 250-500 m < 2 > / g, the pore volume is 1.0-2.0 cm < 3 > / g, the average aperture is 16-30 nm, and the pore diameter of the large-aperture alumina-loaded copper-based catalyst is 20-30 nm. The large-aperture alumina supported copper-based catalyst comprises the following components in percentage by mass: 79%-98.9% of a large-aperture alumina carrier, 0.1%-6% of copper oxide and 1%-15% of lanthanum oxide. The large-aperture aluminum oxide loaded copper-based catalyst disclosed by the invention shows relatively high catalytic activity and higher alcohol selectivity in a reaction for preparing higher alcohol from ethanol, and particularly has relatively high C6-C10 fatty alcohol selectivity.

The invention provides a large-aperture alumina carrier as well as a preparation method and application thereof. The large-aperture alumina carrier is prepared from dry materials and water, and the dry materials comprise inert fibers, aluminum hydroxide and ammonium aluminum carbonate. According to the invention, under the condition of low water-powder ratio, primary pores and secondary accumulation pores in aluminum hydroxide and ammonium aluminum carbonate are reserved to the greatest extent under high extrusion pressure in the carrier extrusion and molding process due to the enhancement effect of inert fibers; although the apertures of the primary pores, the secondary accumulation pores and the macropores generated by decomposition of the ammonium aluminum carbonate are reduced during roasting of the carrier, the volume ratio of the pores with the pore size of more than 500nm in the final carrier is still obviously increased due to the existence of the inert fibers, and the volume ratio of the pores with the pore size of more than 500nm is 15-25%. In addition, the by-product ammonium aluminum carbonate generated in the recovery process of the waste ethylene oxide catalyst is used as the raw material and the macroporous pore-enlarging agent, so that the production cost of the large-aperture alumina carrier is reduced. The prepared large-aperture alumina carrier can be used for preparing a residual oil hydrodemetallization catalyst.

The invention relates to a porous carbon material as well as a preparation method and application thereof. The specific surface area of the porous carbon material is 1500-3000m < 2 > / g, and pore channels are intensively distributed in a range of 0.6-2.0 nm. The preparation method of the porous carbon material comprises the following steps: (1) montmorillonite acid treatment; (2) uniformly mixing the acid-treated montmorillonite obtained in the step (1) with asphalt, and carrying out carbonization treatment to obtain a carbonized material; and (3) under the inert atmosphere condition, mixing the carbonized material with an activating agent for activation, and then washing and drying. The porous carbon material obtained by the invention has the advantages of large specific surface area, reasonable pore size distribution, high ion transmission speed and the like, and is a super-capacitor carbon material with excellent rate capability.

The invention discloses a silicon-carbon composite material and a preparation method thereof. The composite material is composed of porous hard carbon, inorganic lithium salt doped with the porous hard carbon and a porous metal frame as a matrix, nano silicon deposited in pores of the matrix, and an amorphous carbon composite material coated on the surface. The preparation method comprises the following steps: uniformly mixing resin, inorganic lithium salt and a porous metal framework, and carrying out hydrothermal reaction, activation and secondary carbonization to obtain a porous carbon complex; and depositing nano silicon and coating the nano silicon with an organic lithium salt through a vapor deposition method to obtain the silicon-carbon composite material. According to the obtained material, expansion is reduced through large-aperture deposited nanometer silicon of the metal frame structure, the defects are reduced through the inorganic lithium salt of the inner core and the organic lithium salt of the outer shell, the ion diffusion rate is increased, and the first efficiency and the rate performance are improved.

The invention discloses a waterproof long-lasting oil-control gel composition and a preparation method thereof, and belongs to the technical field of cosmetics. The composition comprises 4-6 parts of an oil absorption compound A, 9-13 parts of an oil absorption compound B and 70-95 parts of a gel matrix, wherein the oil absorption compound A is prepared from mesoporous silica and poloxamer 407, and the aperture of the oil absorption compound A is 5-10 nm; the oil absorption compound B is prepared from polymethyl methacrylate microspheres, isododecane and polyglycerol-3 diisostearate, and the pore diameter of the oil absorption compound B is 150 to 300 nm. According to the invention, through dual mechanisms of temperature response and volatilization driving, a dynamic gradient structure of bottom layer small aperture-surface layer large aperture is formed at skin temperature, and directional migration of grease is realized; meanwhile, the surface property transformation of the material after oil absorption is creatively utilized, a hydrophobic membrane is formed on the surface of the polymethyl methacrylate microsphere, a self-enhanced waterproof barrier is constructed, the unique effect that the more oil is absorbed, the more water is resisted is achieved, the problem of makeup removal caused by sebum and sweat can be effectively solved, and the makeup lasting time is remarkably prolonged.

The invention provides an automobile lining material with sterilization and peculiar smell removal functions and a preparation method of the automobile lining material. The material for the automobile lining comprises a surface layer, a functional layer and a bottom layer which are sequentially arranged, wherein the functional layer is obtained by performing surface treatment on a fabric through an MOF-lysozyme material. Silver-based ZIF is formed by silver ions and dimethylimidazole, the characteristics of large specific surface area, adjustable aperture and high crystallinity of a traditional MOF material are reserved, and the silver-based ZIF has a certain antibacterial effect due to the silver ions, so that the antibacterial characteristic of a functional layer is enhanced; as the silver-based ZIF has the characteristics of large specific surface area and large aperture, more lysozyme can be covalently grafted, and the silver-based ZIF still has excellent broad-spectrum antibacterial performance; the silver-based ZIF material and the lysozyme synergistically enhance the bactericidal ability of the functional layer, so that the effects of long-acting sterilization, good antibacterial effect and peculiar smell elimination are achieved, the air quality in a vehicle is further improved, and a healthier and fresher riding environment is provided for passengers.

The invention provides a preparation method for preparing porous carbon based on an aerogel method, the porous carbon and application of the porous carbon, and belongs to the technical field of porous carbon material preparation. The preparation method comprises the following steps: mixing polyhydroxy phenol, aromatic aldehyde, acrylamide, graphene oxide and lithium salt according to a mass ratio of 100: (50-200): (5-30): (1-5): (1-5), carrying out hydrothermal reaction at 100-200 DEG C for 1-6 hours, and freeze-drying at-40 DEG C to obtain a hydrogel precursor; and carbonizing the precursor in organic heteroatom gas at 500-800 DEG C, mixing the intermediate with alkali according to the ratio of 100: (100-500), activating at 900-1100 DEG C, pickling and drying to obtain the porous carbon. The conductivity of the product is improved by means of graphene, lithium salt and heteroatoms, and the aerogel method obtains large aperture, has the characteristics of low impedance, high first efficiency and small charge-discharge expansion, and can be efficiently applied to silicon-carbon materials.

The invention relates to the technical field of sodium ion batteries, in particular to an MOF-coated layered oxide positive electrode material, a preparation method thereof and a sodium ion battery. The preparation method comprises the following steps: ball-milling and mixing a metal source and a sodium source, and calcining to obtain a layered oxide positive electrode material; the preparation method comprises the following steps: adding Mn salt or Al salt and 2, 5-dihydroxy terephthalic acid into a mixed solvent composed of dimethyl amide, ethanol and deionized water, stirring, and reacting to obtain an MOF material; and mixing the layered oxide positive electrode material and the MOF material, and carrying out heat treatment to obtain the MOF-coated layered oxide positive electrode material. The MOF serving as a coating layer material has a large-aperture structure, a diffusion channel is provided for sodium ion transmission, and the migration rate of sodium ions is increased; mn-MOF or Al-MOF is used as a coating layer material, so that the surface oxygen defect concentration of the layered oxide positive electrode material can be adjusted, the reversibility of oxidation reduction of oxygen anions can be improved, and the coulombic efficiency and the cycling stability of the battery during charging and discharging under a high-voltage condition can be further improved.

The invention provides an aerogel film with a continuous gradient pore structure and a preparation method and application thereof.The preparation method comprises the steps that a pre-crosslinking solution containing a polymer nanofiber suspension, a sodium alginate solution, a polyethyleneimine aqueous solution and a crosslinking agent is sprayed to a temperature-conducting substrate with the initial temperature ranging from-20 DEG C to-15 DEG C at high pressure; and freeze-drying to obtain the aerogel film with the continuous gradient pore structure. The aperture of the aerogel film is gradually increased from bottom to top, and the range of the aperture is mainly 1-110 [mu] m. The aerogel film is placed in a filter membrane clamp, so that a solution to be filtered passes through the aerogel film according to the sequence of'macropore-mesopore-micropore ', the aerogel film is used for intercepting and recycling particles with different sizes, such as micro-plastics, and high water flux and high rejection rate are both considered. The pore size of the aerogel film can be changed by adjusting the temperature of the temperature-conducting substrate; the prepared aerogel film improves the trade-off effect in the existing filtration separation technology, and has a wide market prospect.

The invention discloses an asymmetric sulfone polymer nanoscale filter membrane as well as a preparation method and application thereof, and belongs to the technical field of membrane materials. The filter membrane comprises a filter membrane main body, the filter membrane main body comprises a pre-filtering layer and a separation layer for intercepting impurities, the average thickness of the separation layer is 0.5-12 microns, and the porosity is 40-80%; the ratio of the maximum aperture of the PMI to the minimum aperture of the PMI of the filter membrane is 1.2-3.5, the retention rate of the filter membrane to 2nm colloidal gold is greater than or equal to 90%, and the ratio of the standard deviation of the area value of the brightness displacement spectrum to the average value of the area value is 0.01-2 when the filter membrane with the retention rate of 2nm colloidal gold is subjected to section brightness measurement; the separation layer structure which is thin and uniform in thickness and the proper pore size and pore size distribution of the filter membrane are combined with high porosity, so that the filter membrane can be ensured to have high flux and high cleanliness while having high interception efficiency, and the filter membrane is suitable for nanoscale purification of a liquid treatment agent used in a semiconductor wet process.

The invention discloses a hydrogen-fluorine atom doped graphdiyne material and a preparation method thereof, and relates to the technical field of carbon materials. According to the method, halogenated aromatic hydrocarbon and an alkynyl compound are taken as raw materials, a palladium catalyst and a copper catalyst are taken as a catalytic system, and an acetylenic bond of the alkynyl compound and the halogenated aromatic hydrocarbon are subjected to a Sonogashira coupling reaction to obtain the hydrogen-fluorine-doped graphite alkynyl material. The graphdiyne material provided by the invention has a large pore diameter, multiple active sites and high thermal stability and chemical stability, so that the hydrofluorine-doped graphdiyne material has excellent electrochemical energy storage property, shows reversible capacity of 1155mAh g <-1 > under 0.05 Ag <-1 > when being used as a negative electrode of a lithium ion battery, and can be used as a negative electrode of the lithium ion battery. And the density is almost 3 times that of a commercial graphite negative electrode material (300-350mAh g <-1 >). The application of the graphdiyne material in the field of electrochemical energy storage is obviously promoted.

The invention relates to a dual anti-pollution modified piezoelectric ceramic membrane and a preparation method thereof, and belongs to the field of membrane materials. The ceramic membrane takes piezoelectric ceramic as a support body, the surface of the ceramic membrane is coated with a membrane layer with a small aperture, and one side of the ceramic membrane is modified by zwitterions and is used for separation and pollution resistance. A main body is a porous piezoelectric medium, the pore diameter is large, and self-cleaning is achieved through in-situ ultrasonic cavitation. The preparation method comprises the following steps: sintering to prepare a piezoelectric support body, coating a film layer, sintering to obtain a composite film, and strengthening the binding force by using dopamine hydrochloride to generate sulfanilamide zwitterions. Experiments show that in-situ ultrasound and the zwitter-ion hydration layer have a synergistic effect, and the anti-pollution performance is remarkably improved.

The application discloses a biomass-based nitrogen-doped carbon-carbide molybdenum composite catalyst and a preparation method and application thereof, and is characterized in that: a widely-sourced biomass, especially agricultural biomass waste, is used as a carbon and nitrogen source, ammonium molybdate is used as a molybdenum source, and a nitrogen-doped carbon-carbide molybdenum composite catalyst is prepared through one-step pyrolysis under an ammonia atmosphere; the catalyst is mesoporous nitrogen-doped carbon loaded with pure beta-phase carbide molybdenum, has the characteristics of a large pore size, high dispersion of beta-phase carbide molybdenum and the like, and has good thermal stability; the catalyst can efficiently denitrogenate quinoline and directively convert the quinoline, and high-selectivity aromatic hydrocarbon products can be obtained; the conversion rate is not less than 99%, the denitrogenation rate is not less than 99%, the selectivity of aromatic compounds is not less than 86%, and the catalyst has the characteristics of low hydrogen consumption due to the avoidance of hydrogen saturation reaction.

Proppant particles formed from slurry droplets and methods of use are disclosed herein. The proppant particles can include a sintered ceramic material and can have a size of about 80 mesh to about 10 mesh and an average largest pore size of less than about 20 microns. The methods of use can include injecting a hydraulic fluid into a subterranean formation at a rate and pressure sufficient to open a fracture therein and injecting a fluid containing a proppant particle into the fracture, the proppant particle including a sintered ceramic material, a size of about 80 mesh to about 10 mesh, and an average largest pore size of less than about 20 microns.

The application discloses a kind of linear cutting continuous processing methods of seat body large aperture parallel group hole, belong to mechanical manufacturing technical field.This method is first with seat body A face as reference, planing, planing seat body shape and concave surface to drawing size;Again, workpiece is once clamped and aligned, and linear cutting molybdenum wire is used along preset trajectory to continuously cut, and all large aperture through hole is simultaneously processed, and 45° chamfer bevel is reserved at cutting place;Finally, intermittent welding is used to cutting seam, and workpiece temperature is strictly controlled not to exceed 80 DEG C to prevent thermal deformation, and after welding, weld is ground flat to make surface flush with concave surface.The application is characterized by linear cutting without mechanical cutting force, solves the problem that tool is easily appeared in traditional boring machine processing, through hole taper is big, parallelism is poor, effectively guarantees the size and shape accuracy of through hole.Workpiece is only single clamping, and it is free from dependence on high-skilled operators, processing efficiency and product consistency are significantly improved, and it is suitable for batch processing of large-size seat body parallel deep hole of 45 steel.

The invention discloses a catalytic slurry oil hydrogenation catalyst and a preparation method thereof. The catalyst comprises an alumina carrier containing an auxiliary agent, MoO3 and CoO, the carrier has bimodal pore size distribution, the smaller pore size is intensively distributed at 10-40nm, the pore volume of pore channels with the pore size of 10-40nm accounts for 20%-40% of the total pore volume, the larger pore size is intensively distributed at 150-400nm, and the pore volume of pore channels with the pore size of 150-400nm accounts for 30%-50% of the total pore volume. The catalyst disclosed by the invention is arranged between a hydrogenation protective agent and a hydrogenation desulfurizing agent in a catalytic cracking oil slurry hydrogenation reactor to play a role of connecting the previous part and the next part, so that primary removal of sulfur impurities in catalytic cracking oil slurry is realized, more deposits such as carbon deposits can be accommodated, and the running period of a device is prolonged.

The present application provides an ultra-high molecular weight polyolefin separator comprising ultra-high molecular weight polyethylene, the ultra-high molecular weight polyethylene having an average molecular weight of ≥ 1 million, wherein the ultra-high molecular weight polyolefin separator has a median pore size of 0.04 μm to 1 μm, a maximum pore size not exceeding 1.2 μm, and a puncture strength of ≥ 50 gf. The present application also provides a method for producing the ultra-high molecular weight polyolefin separator, which is safer than conventional nonwoven fabric separators and has higher ionic conductivity and a larger median pore size, thereby solving the problem that conventional nonwoven fabric separators in lithium batteries have high lithium ion permeability but are very dangerous and prone to short-circuiting the battery.

The invention discloses a pole piece. The pole piece has a large aperture size, uniform pores with relatively large sizes are formed in a slurry layer of the pole piece through a salt template method, and the defect that the pores formed by a gas pore-forming agent are too small is overcome; meanwhile, the performance of the pole piece is improved. A battery cell prepared from the pole piece disclosed by the invention can give consideration to both high volume energy density and good constant-current charging ratio.

The application discloses a kind of polymer porous membrane, its preparation method and application in turbidity removal pre-filtering, belong to the technical field of porous membrane preparation.Its technical scheme includes: when the non-solvent phase separation of film-forming polymer solution occurs and the separation layer is formed on the outer surface of polymer membrane, simultaneously, water-soluble coating layer polymer solution is coated on the surface of separation layer, to obtain polymer porous membrane;Film-forming polymer solution uses polysulfone polymer as film-forming base material, uses water-soluble chloride as porogen, uses nitrogen-containing organic matter as solvent;Coating layer polymer solution has porogen effect, and viscosity is 200-1000 mPa·s.The application is applied to turbidity removal pre-filtering, solves the technical problems that existing non-solvent phase separation technology is difficult to obtain large aperture, surface opening rate is high and easy to appear finger-shaped hole, has the characteristics of large aperture, surface opening rate is high, cross section is sponge hole.

This invention discloses a copper-based catalyst supported on macroporous alumina, its preparation, and its application. The macroporous alumina-supported copper-based catalyst comprises a macroporous alumina support and copper oxide and lanthanum oxide supported on its surface. The macroporous alumina-supported copper-based catalyst is particulate with a specific surface area of ​​250-500 μm. 2 / g, pore volume 1.0~2.0 cm³ 3 The copper-based catalyst supported on macroporous alumina has an average pore size of 16-30 nm. The content of each component in the catalyst, expressed as a mass percentage, is as follows: macroporous alumina support 79%-98.9%, copper oxide 0.1%-6%, and lanthanum oxide 1%-15%. The macroporous alumina-supported copper-based catalyst of this invention exhibits high catalytic activity and selectivity for higher alcohols in the ethanol-to-higher alcohol reaction, particularly showing higher selectivity for C6-C10 fatty alcohols.

The present invention relates to a novel metal-organic framework (MOF) and a preparation method thereof, and specifically to a surface-modified novel metal-organic framework which, compared to a metal-organic framework which has not been surface-modified, has an increased specific surface area and a large pore diameter. In addition, the surface-modified metal-organic framework prepared by the preparation method for a novel metal-organic framework according to the present invention has an excellent binding effect with nucleic acids, and thus can be used as a carrier for nucleic acids.

This invention discloses a method for hydrotreating catalytic cracking slurry. A fixed-bed hydrotreating process is employed, comprising: in the presence of hydrogen, the catalytic cracking slurry sequentially contacts a hydrotreating protectant, a hydrotreating transition catalyst, and a hydrodesulfurization catalyst to undergo a hydrotreating reaction, yielding hydrotreated oil. The hydrotreating protectant comprises an alumina support with a most probable pore size of 40–100 nm, molybdenum oxide, and cobalt oxide. The hydrotreating transition catalyst comprises an alumina support containing additives and MoO3 and CoO. The support has a bimodal pore size distribution, with smaller pores concentrated in the 10–40 nm range and larger pores concentrated in the 150–400 nm range. This method eliminates the diffusion resistance during the adsorption and reaction of large molecules on the catalyst surface during the hydrotreating of catalytic cracking slurry, increases the capacity for more deposits such as coke, extends the operating cycle of the unit, and facilitates hydrodesulfurization and other reactions. It also increases the content of tricyclic and tetracyclic aromatics in the hydrotreated oil, making it a high-quality feedstock for needle coke production.

The invention discloses a coal mine energy-saving unpowered drainage device and method, and relates to the technical field of coal mine energy-saving equipment, the coal mine energy-saving unpowered drainage device is installed in a large-aperture drill hole with the diameter larger than or equal to 350 mm, the coal mine energy-saving unpowered drainage device comprises a large-aperture main pipe connected with the large-aperture drill hole in a sealed mode, and an air chamber is formed between the top wall of the large-aperture main pipe and a water layer of the large-aperture drill hole; the top of the large-aperture main pipe is communicated with an air inlet valve, a pressure release valve and a drainage pipe, the air inlet valve and the pressure release valve are respectively communicated with the air chamber, and the bottom end of the drainage pipe penetrates through the large-aperture main pipe and extends to a position at least 1m below the liquid level of a water layer of the large-aperture drill hole. The drainage system can drain water without power, is more energy-saving, has no electrical equipment intervention, is more reliable in safety, stable and efficient in drainage capacity, longer in service life and simple and convenient to maintain.

This utility model relates to the field of laboratory wastewater treatment technology and discloses a laboratory wastewater discharge device with a filter anti-clogging structure, including a storage tank and a disassembly assembly. This laboratory wastewater discharge device with a filter anti-clogging structure, through the arrangement of a storage tank, connecting plate, first filter screen, second filter screen, and third filter screen, allows the wastewater to be filtered. First, the wastewater enters the filter tank through the feed hopper, then contacts the first filter screen. The larger pore size of the first filter screen initially intercepts larger impurities in the wastewater. Then, the smaller pore size of the second filter screen further filters out slightly smaller impurities. Finally, because the third filter screen has the smallest pore size, it intercepts even finer particles and colloidal substances in the wastewater, thereby filtering out solid impurities in the wastewater. This greatly improves the purity of the filtered wastewater, enabling the discharged wastewater to meet higher standards, reducing the load on subsequent wastewater treatment systems, and lowering the risk of environmental pollution.

The application discloses a kind of phosphoric acid group modified β-cyclodextrin-based polymer film microextraction coating material and its application.First, a kind of phosphoric acid group β-CD porous crosslinked polymer (DBP-β-BNCD) and its preparation method are provided.The DBP-β-BNCD has the advantages of large specific surface area, narrow pore size distribution, large pore volume, good thermal stability, etc., which is beneficial to the accessibility of adsorption sites.When adsorbing hydrophilic pollutants antibiotics, various adsorption mechanisms such as polarity interaction, hydrogen bond interaction and π-π interaction are introduced.Further, by using DBP-β-BNCD as a thin film solid phase microextraction coating material, a method combining TFME with high performance liquid chromatography-tandem mass spectrometry (HPLC-QqQ-MS) is established, and the results show that the coating material has great potential for the extraction of hydrophilic organic pollutants in the environment.

The application discloses a preparation method of a high-stability cellulose nanofluid film, and a product and application thereof, and belongs to the field of energy conversion and material science. The method comprises the following steps: adding modified cellulose into an ionic liquid to prepare a solution by heating; dropping and coating the solution onto the surface of a porous polymer film, and preparing a gel film by heating and vacuum treatment; and obtaining the nanofluid film after water soaking and drying of the gel film. The nanofluid film adopts an embedded structure, the cellulose layer is a small-pore structure, the porous polymer film is a large-pore structure, and the nanofluid film has etching and three-dimensional network channel structures. The preparation process is simple and the conditions are mild, the prepared film has excellent ion rapid selective transmission performance, acid-base stability and long-term operation stability, can efficiently convert salinity gradient energy into electric energy, and has a good application prospect in the field of salt-difference osmotic energy utilization.

A lithium secondary battery with reduced Hi-pot defects and improved capacity retention rate. According to one aspect of the present disclosure, a lithium secondary battery includes an anode, a cathode, and a separator interposed between the anode and the cathode. The anode includes a Si-based anode active material. The separator includes a separator substrate having a plurality of pores and including a polyolefin resin. The polyolefin resin has a polydispersity index (PDI) of 2.5 to 4.2, an average pore size of 20 to 40 nm, and a maximum pore size of 50 nm or less.

The invention discloses a dephosphorization material and a preparation method and application thereof, the dephosphorization material comprises: a base material, the base material comprises SiO2, Al2O3, Fe2O3, CaO and MgO; elemental iron; and a plant foaming agent. The large-aperture structures uniformly distributed inside and outside the phosphorus removal material are beneficial to growth and attachment of microorganisms, and generation sites are provided for the removal process of phosphoric acid. The elemental iron contained in the material and phosphate undergo valence change through chemical combination to form hydroxyl and phosphorus flocculation so as to efficiently remove phosphorus pollution. In addition, due to the characteristics of oxidation-reduction capability, low cost, high porosity, difficulty in bonding, large specific surface area, high active iron content and the like of iron, the material has stronger electrochemical enrichment, physical adsorption and oxidation-reduction properties. Therefore, the traditional bottleneck is solved, and excellent efficiency is achieved in a biological filter and an artificial wetland.

The invention discloses a preparation method of through hole type resin, and belongs to the technical field of polymer resin materials. A ternary composite pore-foaming agent composed of toluene, n-heptane and polyethylene glycol (PEG) is adopted, the proportion of the ternary composite pore-foaming agent is optimized, and the through type resin is prepared through suspension polymerization and temperature programming curing. The resin prepared by the method has a highly through pore channel network, the penetration rate is not less than 50%, the resin also has appropriate large pore diameter and relatively high specific surface area and pore volume, meanwhile, the resin keeps good mechanical stability while obtaining an excellent penetration structure, the preparation process is good in repeatability, and the preparation method is suitable for industrial production. An ideal material is provided for the fields of high-performance adsorption separation, chromatographic analysis, catalysis and the like.