112results about How to "Rich pore structure" patented technology

The invention discloses a phosphorus removal filler and a preparation method and application thereof, and belongs to the technical field of fillers. Sulphoaluminate cement, chitosan, sodium alginate and calcium peroxide are uniformly mixed in a nitric acid solution in an amino-containing coupling agent, then foaming and pore forming are performed under steam, and the phosphorus removal filler is prepared. And finally, uniformly mixing with titanium dioxide, sodium silicate, a ferrous sulfate solution and sodium borohydride to obtain the phosphorus removal filler with an excellent phosphorus removal effect, and the phosphorus removal filler has a rich pore structure and adsorption activity, can sufficiently perform physical adsorption on phosphorus elements, and has a good phosphorus removal effect. Meanwhile, the phosphorus removal filler further has excellent surface complexing activity and photocatalysis, insoluble salt precipitates can be generated through reaction of iron elements and calcium elements and phosphate in water, so that total phosphorus is removed, the material is ground after adsorption saturation and put into a fish pond to serve as a phosphorus supplementing material, resource recycling can be achieved, and the cost is reduced. Wide application prospects are realized.

The invention discloses a preparation method of a low-temperature SCR (Selective Catalytic Reduction) catalyst with coke loaded with transition metal oxide. The preparation method comprises the following steps: preparing superfine coal powder; removing mineral substances from the superfine coal powder to obtain ash-removed coal powder; chemically activating the deashed coal powder into an activated coal base; coking the activated coal base to form a coal coke carrier; and preparing a single Fe oxide catalyst and an Fe-Mn composite oxide catalyst which take the coal coke as a carrier. The catalyst is prepared from the coal, so that the utilization value of the coal can be improved, the conversion of the coal from fuel to raw materials can be accelerated, and the pollution of the coal to the environment is reduced. Meanwhile, compared with a noble metal catalyst and coke, the catalyst with the coke carrier prepared by the method disclosed by the invention is lower in price and wide in source, so that the preparation cost of the catalyst can be reduced, and compared with other matrix materials, the coke carrier prepared by the method disclosed by the invention takes superfine pulverized coal coke as a matrix, so that the cost of the catalyst is reduced. The preparation cost is lower, and the pore structure is richer.

The invention discloses a medium and low temperature organic sulfur hydrolytic agent applied to coal gas dry purification and a preparation method thereof, and relates to the technical field of coal gas purification and industrial catalysis, the hydrolytic agent comprises the following components: gamma-Al203, pseudo-boehmite, a pore forming agent, an active agent, an auxiliary agent, an adhesive and water. According to the medium-low temperature organic sulfur hydrolytic agent applied to dry purification of coal gas and the preparation method thereof, an alkali metal element is adopted as an active agent, and the characteristic that the alkali metal element can provide a large number of alkaline reaction sites is utilized, so that organic sulfur molecules are promoted to be preferentially adsorbed with the hydrolytic agent to generate hydrolysis reaction; meanwhile, sodium metavanadate is added as an active auxiliary agent, so that the low-temperature activity of the hydrolysis catalyst is further optimized.

The invention relates to the technical field of sustained and controlled release fertilizers, in particular to a soil-improving disease-resistant sustained and controlled release fertilizer and a preparation method thereof. The preparation method comprises the following steps: (1) preparation of the nutrient core: weighing an organic fertilizer, an ammonium nitrogen fertilizer, a phosphate fertilizer, a potash fertilizer, a biological regulator, chelated medium trace elements and modified attapulgite, uniformly mixing, and granulating to obtain the nutrient core; (2) covering an organic polymer coating layer: dissolving polylactic acid in a solvent to form a composite solution, spraying the composite solution on the surface of the nutrient core, and drying to obtain an organic polymer coated nutrient core; and (3) covering a mineral coating layer. The outermost layer of the soil-improving disease-resistant controlled-release fertilizer provided by the invention is the mineral coating layer, the mineral coating layer can be gradually disintegrated after being applied to soil, mineral components can improve the physical structure of the soil, regulate the acid-base property of the soil and increase the content of organic matters in the soil after entering the soil, and inorganic and organic nutrients are slowly released into the soil through the organic polymer coating layer; nutrient substances are continuously supplied, and common diseases of the corn are prevented and controlled.

The invention discloses a porous high-entropy perovskite composite material and a preparation method and application thereof, and belongs to the technical field of electrode materials, on the basis of an oxide LaFeO3, Mn < 2 + >, Co < 2 + >, Ni < 2 + > and Cu < 2 + > are adopted to dope and replace part of Fe < 3 + >, so that the porous high-entropy perovskite composite material with the chemical formula of La (Mn0. 2Fe0. 2Co0. 2Ni0. 2Cu0. 2) O3 is obtained, and the porous high-entropy perovskite composite material with the chemical formula of La (Mn0. 2Fe0. 2Co0. 2Ni0. 2Cu0. 2) O3 is prepared. The specific surface area and the porous structure of the high-entropy perovskite composite material are increased, more electrochemical active sites are exposed, and richer electrolyte ion transmission channels are provided, so that various properties of the electrode material prepared by taking the porous high-entropy perovskite composite material as the raw material are improved.

The invention discloses an extremely low temperature resistant gel electrolyte and a preparation method and application thereof, and belongs to the technical field of gel electrolytes and preparation thereof. The problems that an existing gel electrolyte is prone to freezing at low temperature, and the mechanical property and the ionic conductivity are difficult to consider at the same time are solved. According to the invention, the hydrophilic substance maltitol is introduced into the gel electrolyte, so that the phenomena of dendritic crystal, corrosion, passivation and the like at the interface of the electrolyte and a zinc anode are relieved without introducing an organic solvent, and meanwhile, the introduced maltitol destroys the hydrogen-bond interaction between deionized water, so that the freezing of solvent water is inhibited; according to the present invention, the ultra-low temperature performance of the gel is improved, the ultra-low temperature resistance of the gel electrolyte is ensured, the gel electrolyte has excellent cycle stability under the condition of-60 DEG C 10 mAcm <-2 >, and the obtained gel electrolyte further has excellent mechanical property.

The invention relates to the technical field of batteries, in particular to a lithium ion secondary battery. Comprising a positive plate, a diaphragm and a negative plate which are stacked and wound, along the winding direction, a current collector of the positive plate is provided with a positive active layer and an insulating layer; the insulating layer partially covers the positive active layer and partially covers the current collector; the insulating layer comprises first inorganic particles; the diaphragm comprises a base material layer and a ceramic layer positioned on at least one side surface of the base material layer, and the ceramic layer faces the positive plate; the ceramic layer comprises second inorganic particles; the ratio of the second Dv50 of the particle size of the second inorganic particles to the first Dv50 of the particle size of the first inorganic particles is 0.25-10, and the second Dv50 is not equal to the first Dv50. According to the lithium ion secondary battery disclosed by the invention, burrs on the positive plate are effectively reduced, the self-discharge and lithium separation problems of the battery are improved, and the cycle life of the battery is prolonged.

The invention relates to the technical field of silicon-carbon precursors, in particular to a mesoporous resin-based silicon-carbon precursor preparation method which comprises the following steps: selecting a mesoporous resin raw material, treating to obtain primary treated resin, selecting a silica raw material, treating to obtain primary treated silica, and preparing a first mixture for later use, thereby obtaining the mesoporous resin-based silicon-carbon precursor. Carrying out mixing treatment on the primarily treated resin and the first mixture to obtain a first standby material, preparing a second mixture for later use, carrying out mixing treatment on the primarily treated silica and the second mixture to obtain a second standby material, and carrying out mixing treatment on the first standby material and the second standby material to obtain a mesoporous resin-based silicon carbon precursor; the silica raw material and the mesoporous resin raw material are primarily treated to enhance the compatibility of the silicon powder and the primarily treated resin, so that the prepared mesoporous resin-based silicon carbon precursor has better specific surface area performance, and the use performance of the precursor in the subsequent preparation process is improved.

The invention relates to the field of materials, and discloses a three-dimensional graphene / metal oxide composite pellet and a preparation method and application field thereof, the three-dimensional graphene / metal oxide composite pellet comprises a graphene pellet and a metal oxide loaded on the graphene pellet; wherein the specific surface area of the three-dimensional graphene / metal oxide composite sphere is 50-500m < 2 > / g. In the obtained three-dimensional graphene / metal oxide composite sphere, the metal oxide is uniformly loaded on the surface of the graphene sphere, and the sphere internally has a rich pore structure, so that the application of gas sensing, catalysis, energy storage and the like is facilitated.

The invention discloses a low-moisture and high-safety lithium battery diaphragm and a preparation method thereof.The low-moisture and high-safety lithium battery diaphragm comprises a base membrane and a coating on the base membrane, the coating comprises modified gamma-phase superfine porous aluminum oxide, the modified gamma-phase superfine porous aluminum oxide is obtained by modifying gamma-phase superfine porous aluminum oxide through a silane coupling agent, and the modified gamma-phase superfine porous aluminum oxide is prepared from modified gamma-phase superfine porous aluminum oxide. The silane coupling agent is one of a vinyl silane coupling agent and a methyl silane coupling agent. According to the invention, surface modification is carried out on gamma-phase superfine porous alumina by using a silane coupling agent with a hydrophobic group, so that the diaphragm has high ionic conductivity, good high temperature resistance and good liquid absorption and retention capability, and meanwhile, the water content of the diaphragm is reduced.

The invention relates to the technical field of agricultural fertilizers, in particular to a preparation method of a soil improvement type microbial fertilizer, which is used for solving the problems that most of microbial fertilizers are poor in water retention capability and microbial activity, complex in preparation process and high in cost, and the effect of the microbial fertilizers in practical application is restricted. According to the preparation method, various raw materials are reasonably compounded, rich nutritional ingredients are provided for the soil improvement type microbial fertilizer, the load type complex microbial inoculants are added into the soil improvement type microbial fertilizer, the synergistic effect of various beneficial microorganisms can be achieved, and therefore the soil structure is effectively improved, the soil fertility is improved, and plant growth is promoted; the fertilizer has the advantages of good fertilizer holding capacity, degradability and water and fertilizer saving, the yield and quality of crops are finally improved, and the purpose of agricultural ecological environment protection is achieved.

The invention discloses a lithium battery diaphragm with a porous alumina-based composite material coating and a preparation method of the lithium battery diaphragm with the porous alumina-based composite material coating, the lithium battery diaphragm with the porous alumina-based composite material coating comprises a base membrane and a coating on the base membrane, the modified porous aluminum oxide comprises porous aluminum oxide and a lithium element loaded on the porous aluminum oxide. The method for preparing the modified porous aluminum oxide comprises the following steps: soaking the porous aluminum oxide in an aqueous solution of lithium salt, simultaneously stirring and performing ultrasonic treatment for 4-6 hours in a vacuum environment, drying, grinding into powder, and roasting for 2-4 hours at 400-600 DEG C in an inert gas atmosphere to obtain the modified porous aluminum oxide. The lithium battery diaphragm disclosed by the invention has high heat resistance, high wettability and high ionic conductivity.

The invention discloses a method for preparing porous activated carbon based on pulse electrochemical activation, the porous activated carbon and application, and the method comprises the following steps: preparing a working electrode plate from carbon powder, and placing the working electrode plate in an electrolyte for pulse electrochemical square wave circulation treatment, wherein the electrolyte is an aqueous solution containing sulfuric acid, persulfate, sulfate and a cationic surfactant, stripping, cleaning and drying to obtain the porous activated carbon. According to the preparation method, the carbon powder is prepared into the working electrode plate, and the working electrode plate is subjected to pulse electrochemical square wave circulation treatment in the electrolyte containing the sulfuric acid, the persulfate, the sulfate and the cationic surface active agent, so that the porous activated carbon with large specific surface area, high electro-adsorption capacity and good conductivity can be prepared; when being used as a raw material for preparing a capacitive deionization electrode, the composite material shows good conductivity, high desalination capacity and high desalination rate, can be widely used for electro-adsorption desalination, and is high in use value and good in application prospect.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

The invention discloses an anaerobic denitrifying bacterial agent as well as a preparation method and application thereof, and belongs to the technical field of water environment treatment. The anaerobic denitrifying bacterium agent is prepared from the following components in parts by weight: 15 to 30 parts of sterile water, 15 to 60 parts of normal saline, 5 to 10 parts of micro-capsule embedded anaerobic denitrifying bacteria, 5 to 20 parts of a porous composite modified carrier, 10 to 30 parts of a carbon source, 4 to 7 parts of nutrient elements, 2.5 to 4 parts of a buffering agent and 1 to 5 parts of a stabilizer, the micro-capsule embedded anaerobic denitrifying bacteria are obtained by embedding anaerobic denitrifying bacteria with an alginic acid gel solution and a calcium chloride solution; the porous composite modified carrier is obtained by crosslinking modified nano iron oxide, modified nano titanium dioxide, a functional polymer solution and glutaraldehyde. The anaerobic denitrifying bacterial agent provided by the invention can effectively improve the efficiency of treating nitrogen pollution of a water body.

The present invention provides a rare earth metal modified layered positive electrode material for sodium ion batteries and a preparation method thereof. The main structure of the rare earth metal modified layered positive electrode material for sodium ion batteries is an O3 phase, and the chemical formula is NaNi a Fe b Mn c Re d O 2 , 0.28≤a≤0.33, 0.28≤b≤0.33, 0.28≤c≤0.33, 0≤d≤0.05, Re represents a rare earth metal element; the layered positive electrode material includes spherical secondary particles, the secondary particles include a plurality of stacked flaky primary particles, part of the rare earth metal elements are distributed on the surface of the secondary particles in the form of rare earth metal oxides, and part of the rare earth metal elements are doped in the layered positive electrode material lattice in the form of rare earth metal ions. The positive electrode material provided by the present invention is modified based on rare earth metal elements, and has good sphericity and rich pore structure. The battery containing the positive electrode material exhibits excellent rate performance and good cycle stability.

The invention relates to the technical field of carbon dioxide dealkylation, and discloses a catalyst for removing hydrocarbon impurities in carbon dioxide and a preparation method of the catalyst. According to the catalyst for removing hydrocarbon impurities from carbon dioxide, active components are loaded on composite carrier particles; the composite carrier particles are obtained by loading a catalytic promoter cerium oxide on composite aerogel, grinding and sieving; the composite aerogel is prepared from a coagulant aid and at least two aerogel precursors by a sol-gel method. The preparation method of the catalyst for removing hydrocarbon impurities in carbon dioxide comprises the following preparation steps: 1) preparing composite aerogel from an aerogel precursor and a coagulant aid through a sol-gel method; 2) soaking the composite aerogel in a cerium nitrate solution, naturally airing, drying, roasting, grinding and sieving to obtain composite carrier particles; and 3) dipping the composite carrier particles in a mixed solution of active components, standing, drying and roasting to obtain the catalyst for removing hydrocarbon impurities from carbon dioxide.

The utility model discloses an indoor microorganism disinfection and purification system which comprises a shell, the shell is provided with an air inlet and an air outlet, the shell is provided with a purification device, a disinfection device and a centrifugal fan, and the purification device, the disinfection device and the centrifugal fan are sequentially arranged in the airflow direction; the disinfection device comprises a photocatalyst layer and a plurality of ultraviolet lamp tubes, and the photocatalyst layer and the ultraviolet lamp tubes are sequentially arranged in the direction from the air inlet to the air outlet. The disinfection device is composed of a photocatalyst layer and a plurality of ultraviolet lamp tubes, under ultraviolet irradiation, the photocatalyst layer can generate hydroxyl free radicals and superoxide anion free radicals with strong oxidizing property, and the free radicals can be rapidly subjected to oxidation-reduction reaction with bacteria, viruses, formaldehyde and other harmful microorganisms and organic pollutants in the air, so that the disinfection effect is achieved. The cell structure or molecular chain is destroyed and decomposed into harmless substances such as carbon dioxide, water and the like, so that the purposes of disinfection and purification are achieved.

The invention provides a system and a process for continuous crystallization synthesis of a molecular sieve, and belongs to the technical field of molecular sieve catalyst preparation methods. According to the system and the process for synthesizing the molecular sieve through continuous crystallization, raw materials for synthesizing the titanium silicalite molecular sieve are added into the long reaction tube, and the titanium silicalite molecular sieve with small grain size and uniform distribution is obtained through a crystallization reaction in a continuous flowing process in the reaction tube. In addition, a regulator is added in batches in the flow reaction process, the internal pore structure of the titanium silicalite molecular sieve is further regulated, and the titanium silicalite molecular sieve with abundant pore structures and large specific surface area is obtained.

The invention relates to a single-crystal hollow ZSM-5 molecular sieve and a preparation method and application thereof, the single-crystal hollow ZSM-5 molecular sieve has a double-layer closed hollow structure and a regular hexagonal morphology, the average grain size is 1.0-3.0 [mu] m, and the whole particle is a single-crystal structure. The synthesis method comprises the following steps: synthesizing a seed crystal solution; the preparation method comprises the following steps: dissolving a silicon source in alkali liquor, then mixing with an aluminum source solution to form a mixed solution with specific composition, adding the seed crystal solution, crystallizing, carrying out alkali treatment, and carrying out post-treatment. The molecular sieve has higher low-carbon olefin yield and higher propylene / ethylene ratio in hydrocarbon catalytic cracking reaction. The preparation method is simple, does not need to adopt a large amount of organic template agents, and is good in technical economy.

The invention discloses corrosion aluminum powder and a preparation method and application thereof, and the preparation method comprises the following steps: S1, carrying out plasma passivation treatment on aluminum powder to obtain surface modified aluminum powder with an amorphous aluminum oxide layer; and S2, carrying out surface micro-corrosion on the surface modified aluminum powder, and then drying and grading to obtain the corroded aluminum powder. The method comprises the following steps: forming an amorphous aluminum oxide layer on the surface of aluminum powder; and then micro-corrosion is carried out on the amorphous aluminum oxide layer, a rich pore structure is formed on the amorphous aluminum oxide layer, and after corrosion is completed, the amorphous aluminum oxide layer can be automatically formed on the corrosion surface again. The surface of the obtained corrosion aluminum powder is completely wrapped by the amorphous aluminum oxide layer, so that the leakage current can be greatly reduced, and the electrochemical stability of the anode foil is greatly improved; the porous carbon has certain roughness and rich pore structures, and the specific surface area and the specific volume are greatly increased; the micro-corrosion has no negative influence on the mechanical strength of the aluminum powder, and ensures that no micro-crack appears on the surface of the anode foil.

This invention provides a functionalized microporous elastic fiber and its preparation method. The preparation process involves first dissolving a predetermined mass of polyurethane prepolymer in a binary solvent to obtain a spinning solution; then mixing silicone oil and an emulsifier to obtain solution A; simultaneously, uniformly dispersing functional particles in deionized water to obtain dispersion B; then adding dispersion B to solution A and mixing to obtain an emulsion coagulation bath; finally, placing the prepared spinning solution in a spinning device and ejecting it through spinning holes, allowing the spun fibers to enter the prepared emulsion coagulation bath for a predetermined time, followed by stretching and drying to obtain functionalized microporous elastic fibers. This invention controls the difference in compatibility between the binary solvent and the water and silicone oil in the emulsion coagulation bath, enabling rapid shaping of the spun fibers and simultaneously achieving the preparation of functionalized fibers. Based on the principle of phase separation, by controlling the solvent ratio and the degree of emulsification in the coagulation bath, and further through stretching and high-temperature drying and setting, porous functionalized elastic fibers are obtained.

The invention relates to a soil microorganism high-efficiency water purification filter material and a preparation process thereof, and aims to solve the problems of low removal efficiency, high cost, easiness in secondary pollution, insufficient affinity with soil microorganisms and the like of the existing microorganism filter material. The filter material is prepared by taking volcanic rock, activated carbon, bentonite and modified cellulose as main raw materials, combining the main raw materials according to a specific ratio, preparing porous particles by virtue of processes such as calcining, activating, mixing, granulating and sintering, and finally loading the porous particles by virtue of a microbial bacterial liquid. The product has a large specific surface area, good adsorption performance and high chemical stability, and can provide an excellent adhesion and growth environment for soil microorganisms. Experiments prove that the filter material can significantly improve the removal efficiency of pollutants such as COD, ammonia nitrogen and total phosphorus in sewage, and the filter material has the advantages of easily available raw materials, low cost and environmental friendliness, and is suitable for the fields of sewage treatment, ecological restoration and the like.

The invention belongs to the field of preparation of photoelectric catalytic materials, and discloses a zirconium-based MOFs composite material loaded with carbon nitride quantum dots as well as a preparation method and application of the zirconium-based MOFs composite material. The composite material is prepared by adopting a solid phase method, and the method is simple, low in cost, easy to amplify, free of toxic solvents and environmentally friendly. The zirconium-based MOFs composite material loaded with the carbon nitride quantum dots prepared by the invention retains the advantages of large specific surface area and rich pore structure of the MOFs material, and shows excellent hydrogen production performance when the zirconium-based MOFs composite material loaded with the carbon nitride quantum dots is used as a photoelectrode material for hydrogen production by photoelectrocatalytic decomposition of water.

The present invention discloses a method and application of preparing hollow structure carbon nanofibers by using uniaxial electrospinning technology, and relates to the field of flexible electrode materials. In the method, polyacrylonitrile and cellulose acetate are dissolved in N,N dimethylformamide solution to form a spinning precursor solution, a non-woven nanofiber membrane is obtained by uniaxial electrospinning technology, and a hollow carbon nanofiber self-supporting flexible electrode material is obtained after pre-oxidation and high-temperature carbonization treatment. The hollow structure can effectively increase the charge storage space, provide a fast transmission channel for electrons and ions, and make it have excellent electrochemical properties. The non-woven fabric structure formed by the interweaving of ultra-long nanofibers has good flexibility, and the assembly of energy storage devices can be realized without conductive agents and binders. The preparation method of the hollow carbon nanofiber electrode material provided by the present invention is simple, easy to mass produce, and has broad application prospects in the field of flexible energy storage devices.

The invention provides special phenyl silicone oil for cosmetics and a preparation method of the special phenyl silicone oil, and belongs to the technical field of material chemistry. The preparation method comprises the following steps: carrying out prepolymerization and ring-opening copolymerization reaction on raw materials including trimethyl triphenyl cyclotrisiloxane, diphenyl double-end socket and a solid catalyst to obtain a copolymer; carrying out reduced pressure distillation on the copolymer to obtain special phenyl silicone oil; the solid catalyst is obtained by the following steps: preparing a magnetic core material containing an anionic polymer; carrying out coating treatment on the magnetic core material by adopting an organic matter containing a cationic polymer to obtain magnetic particles; preparing a silicon dioxide porous carrier by adopting a raw material comprising magnetic particles; ammonium dihydrogen phosphate is loaded on a silicon dioxide porous carrier, and an acidic solid catalyst is obtained. According to the method, the catalyst which is good in catalytic effect and convenient to recycle and recycle is adopted, so that the environment-friendly degree of phenyl silicone oil production is improved, and the production cost is reduced.

This invention discloses a fluidized bed hydrotreating catalyst, its preparation method, and its application. The hydrotreating catalyst includes a hydrotreating active metal component, a support, and optional auxiliary phosphorus. The support is a carbon-containing alumina composite support. The preparation method includes the following steps: (1) spheroidizing a first pseudoboehmite powder to obtain a first support precursor; (2) treating an aqueous solution of the first support precursor, an additive, and an organic polymer B to obtain a second support precursor; (3) treating the second support precursor, the second pseudoboehmite powder, and an acidic solution to obtain a third support precursor; (4) subjecting the third support precursor to low-temperature heat treatment to obtain a fourth support precursor; (5) mixing the fourth support precursor with an auxiliary solution, drying, and calcining to obtain an auxiliary-modified carbon-containing alumina composite support; (6) introducing a hydrotreating active metal component onto the composite support, followed by drying and calcining to obtain the fluidized bed hydrotreating catalyst.

This invention provides a coal-based hard carbon anode material, its preparation method, and its applications. The preparation method includes the following steps: introducing industrial waste gas into raw coal, sequentially performing pre-carbonization and pore-forming, followed by high-temperature carbonization to obtain the coal-based hard carbon anode material. The preparation method provided by this invention uses extremely low-cost industrial waste gas to perform pore-forming treatment on the raw coal material, greatly reducing the preparation cost, and the resulting coal-based hard carbon anode material has high capacity and excellent performance.

This invention provides a solid acid catalyst comprising a divinylbiphenyl polymer as a backbone and a sulfonate group as an active center; wherein the divinylbiphenyl polymer comprises substituted or unsubstituted divinylbiphenyl monomer structural units and optionally substituted or unsubstituted divinylbenzene monomer structural units; in both the substituted or unsubstituted divinylbiphenyl monomer structural units and the substituted or unsubstituted divinylbenzene monomer structural units, the substituents are each independently C1-C5 alkyl groups. This invention selects suitable polymeric monomers and polymerizes them to obtain a polymer backbone with a stable backbone structure and a large specific surface area; after sulfonation, the backbone structure is maintained, and the resulting catalyst has a stable acid active center.

The invention discloses a novel biomolecular carbon material device for removing antibiotic pollutants in meat and vegetables as well as a preparation method and application of the novel biomolecular carbon material device. The novel biomolecular carbon material device is used for removing the antibiotic pollutants in the meat and vegetables. The biomolecular carbon material is prepared by the following steps: preparing biochar from coffee residues and tea residues through a specific firing process, pressing the biochar through a specific adhesive to form a spherical device, and drying the spherical device. The spherical device is placed in a container containing meat or vegetables, and antibiotic pollutants in the container can be effectively adsorbed. According to the invention, resource utilization of wastes is realized, a safe, efficient and environment-friendly method for removing antibiotic pollutants in meat and vegetables is provided, food safety is guaranteed, and the method has important application value in the field of food safety.