116 results about "Nitrogen rich" patented technology

The invention provides a method for preparing a nitrogen-rich liquid fertilizer and a soil conditioner from agricultural biomass wastes, and belongs to the technical field of humic acid synthesis. According to the agricultural biomass waste treatment method, nano-bubble nitrogen sources are coupled with agricultural biomass waste for a hydrothermal reaction, and the nitrogen sources in the method serve as additives to provide nitrogen elements to improve the quality of humic acid and serve as catalysts to improve the yield; by adopting a nano bubble solution system, the contact area of a nitrogen source, agricultural biomass waste and water is increased, and the yield and quality of a product are improved. According to the method disclosed by the invention, the quality and yield of humic acid and hydrothermal carbon are improved, the content of nutrient elements such as nitrogen element in the product is increased, the problems of low nitrogen fertilizer utilization rate, single returning nutrient of fulvic acid, humic acid or hydrothermal carbon and the like are solved, and a new thought is provided for resource utilization of agricultural biomass wastes such as straws and the like.

The invention provides N-Fe co-doped biochar, a preparation method and application of the N-Fe co-doped biochar in production of medium-chain carboxylic acid by anaerobic digestion. The preparation method comprises the following steps: S1, pretreating a nitrogen-rich biomass raw material; s2, pyrolyzing and carbonizing the pretreated nitrogen-rich biomass raw material to obtain N-doped biochar; s3, adding FeCl3. 6H2O, a stabilizer, a buffer agent and N-doped biochar into an organic solvent, and uniformly mixing to obtain a mixed solution; s4, performing microwave-assisted solvent heat treatment on the mixed solution to obtain a precursor mixed solution; and S5, carrying out centrifugal washing on the precursor mixed solution, filtering, and drying to obtain the N-Fe co-doped biochar. On one hand, the required nitrogen element is obtained by using the nitrogen-rich biomass raw material, and the use of an exogenous nitrogen-containing material is avoided; on the other hand, the biochar is kept in a good dispersion state in a solution through microwave solvent heat treatment, agglomeration of particles is avoided, the electrical conductivity, the thermal conductivity and the mechanical strength of the biochar are improved, and the N-Fe co-doped biochar can also be used for producing medium-chain carboxylic acid through anaerobic digestion.

The invention belongs to the technical field of new materials, and particularly discloses nitrogen-rich activated carbon for soil mercury passivation and a preparation method and application thereof.The preparation method comprises the steps that dicyandiamide is subjected to a hydrothermal reaction to obtain a porous g-C3N4 precursor, then the porous g-C3N4 precursor and activated carbon are evenly mixed, and finally heat treatment is conducted to obtain the nitrogen-rich activated carbon. The prepared nitrogen-rich activated carbon can effectively remove dissolved mercury in a rice field. The cost is low, the preparation method is simple, and the prepared nitrogen-rich activated carbon is stable in structure, large in specific surface area, multiple in active sites and capable of effectively resisting interference of soluble organic matter and coexisting ions in soil, efficient fixation of biological available mercury in soil pore water is achieved, and generation of methyl mercury is reduced to the maximum extent.

The invention relates to the technical field of flame retardants and flame-retardant composite materials, in particular to a nitrogen-rich DOPO-based flame retardant and synthesis and application thereof. The polarity matching degree of a conventional phosphorus-based flame retardant and epoxy resin is poor, phase separation or migration precipitation is prone to occurring, the flame retardance of flame-retardant epoxy resin is unstable, and the flame-retardant effect needs to be further improved. Aiming at the technical problems, the invention provides the nitrogen-rich DOPO-based flame retardant which belongs to a reaction type phosphorus-nitrogen flame retardant, a secondary amine group in a molecular structure of the nitrogen-rich DOPO-based flame retardant can generate a chemical bond with an epoxy group in an epoxy resin structure, and compared with a conventional phosphorus-based flame retardant, the nitrogen-rich DOPO-based flame retardant has better compatibility with epoxy resin, is not easy to fall off, and can be used for preparing the flame retardant. The influence on the mechanical property and transparency of the epoxy resin is relatively small, and the application prospect is relatively good.

The invention relates to the technical field of ceramic materials, and discloses a nitrogen-rich Si-Zr-N precursor, a nitrogen-rich amorphous SiZrN ceramic preparation method and a nitrogen-rich Si-Zr-N. The preparation method comprises the following steps: mixing perhydropolysilazane and tetrakis (dicarboxamide) zirconium, and then carrying out low-temperature liquid ammonia crosslinking and room-temperature ammonification to obtain the nitrogen-rich Si-Zr-N precursor. According to the preparation method of the nitrogen-rich amorphous SiZrN ceramic, high-temperature ammonolysis is carried out on a nitrogen-rich Si-Zr-N precursor, and the nitrogen-rich amorphous SiZrN ceramic is obtained. According to the invention, the nitrogen content of the precursor is increased through the molecular-level structure design, so that the formation of the high-nitrogen-ratio amorphous ceramic is facilitated; the pyrolysis path can be regulated and controlled, the product structure is compact, the components are uniform, and the problem of uneven mixing or incomplete reaction in the traditional method is avoided; the precursor is high in universality, is suitable for various processing and pyrolysis modes, and has good application expansibility; the cost is controllable and the method is environment-friendly.

The invention relates to nitrogen-rich hydrophobic porous biochar as well as a preparation method and application thereof. The nitrogen-rich hydrophobic porous carbon is provided with an amorphous multilayer region consisting of a plurality of graphene layers; wherein the nitrogen-rich hydrophobic porous carbon is derived from biomass, a nitrogen flame retardant and an oxidizing substance; in addition, the nitrogen content of the nitrogen-rich hydrophobic porous carbon is 5-15% by taking the total mass of the nitrogen-rich hydrophobic porous carbon as 100%. The nitrogen-rich hydrophobic porous biochar disclosed by the invention has relatively strong hydrophobicity and developed porous structures such as micropores and mesopores, and the surface of the biochar contains rich oxygen-containing and nitrogen-containing functional groups, so that the CO2 trapping capacity is greatly improved.

The invention belongs to the technical field of nano material application, and particularly relates to a nitrogen-rich carbon nitride gas-sensitive material, a gas-sensitive sensor and a preparation method and application of the nitrogen-rich carbon nitride gas-sensitive material and the gas-sensitive sensor. The ammonia leakage in the environment or the ammonia content in the expired gas of the human body can be accurately detected; and harmful gases such as ethanol, methanol, isopropanol, triethylamine, acetone, trimethylamine, nitrogen dioxide and the like can be detected. The nitrogen-rich carbon nitride gas-sensitive material is prepared into a gas-sensitive sensor, and the gas-sensitive sensor has the advantages of high ammonia responsivity, good selectivity, good stability, strong anti-interference performance and the like at room temperature. The gas sensor does not need to be heated during use, a conventional gas sensor heating step is omitted, and the gas sensor can be directly placed in a normal-temperature environment for operation; and different substrate materials can be used for constructing rigid and flexible substrate sensors, and the application method is simple, easy to operate, good in effect and wide in application prospect.

The invention discloses a preparation method and application of nitrogen-rich biochar, and relates to the technical field of water treatment. The invention aims to solve the problem that antibiotics and heavy metals are difficult to remove at the same time in the existing nitrogen-doped biochar. The method comprises the following steps: 1, cutting soybean straws, mixing the cut soybean straws with urea and distilled water to obtain a mixture, carrying out ultrasonic oscillation on the mixture, then transferring the mixture into a container, and drying the mixture in a drying oven to obtain urea-loaded straws; and 2, putting the obtained urea-loaded straw into a tubular furnace into which nitrogen is introduced for heating, then taking out the straw, grinding, sieving, mixing the sieved material with alkali liquor, activating, cleaning, finally putting the cleaned sample into a drying oven, and drying until the mass is constant, thereby obtaining the nitrogen-rich biochar. The nitrogen-rich biochar prepared by the invention can adsorb oxytetracycline (OTC) and Cu (II) at the same time.

A unit for producing argon by cryogenic distillation, suitable for connection to a double air separation column consisting of first and second columns interconnected thermally, comprises an argon separation column surmounted with a top condenser and a denitrogenation column, means for withdrawing an argon-rich and nitrogen-depleted product (LAR) at the bottom of the denitrogenation column, means for connecting the top of the argon separation column to the denitrogenation column, means for sending a top gas from the argon separation column to the atmosphere, means for withdrawing a nitrogen-rich fluid from the top of the denitrogenation column, an analyser for measuring the nitrogen content at the top of the argon separation column, and means for opening and closing the means for connecting the top of the argon separation column to the denitrogenation column depending on the nitrogen content detected by the analyser.

The application relates to the technical field of refrigeration equipment, and discloses a refrigerator which comprises a cabinet, a drawer seat, an air-regulating film assembly and a suction pump, the cabinet is used for forming a low-temperature storage space; the drawer seat is arranged in the low-temperature storage space; the drawer body is internally limited by a storage cavity; the air-regulating film assembly is arranged in a mounting cavity located at the rear side of the drawer seat, the air-regulating film assembly comprises at least one layer of air-regulating film; the air suction port of the suction pump is communicated with the mounting cavity, under the suction of the suction pump, oxygen in air which is allowed to pass through by the air-regulating film is discharged, at least part of nitrogen in the air is blocked in the mounting cavity, the atmosphere of nitrogen-rich and oxygen-poor gas is reserved in the drawer seat, and the purpose of long-term preservation of fruits and vegetables is achieved. The air-regulating film assembly is arranged at the rear end of the drawer body, the oxygen removal effect on the inside of the drawer seat is guaranteed, the mounting space of the drawer seat in the vertical direction is effectively reduced, and the air-regulating preservation system is facilitated to be quickly maintained and replaced.

The application discloses a preparation method of an environment-friendly chitosan-based heavy metal adsorption air-precipitated bead, and comprises the following steps: preparing chitosan water-precipitated beads through acid-base neutralization solidification, loading the ammonia metal organic framework UiO-66-NH2 prepared through hydrothermal reaction on the chitosan water-precipitated beads through Schiff base reaction of a crosslinking agent, and then further loading polyethylene imine on the composite water-precipitated beads through the same loading means. The CS-UiO-GA-PEI-GA air-precipitated bead adsorbent is prepared through freeze-drying of the water-precipitated beads by a freeze dryer. The secondary crosslinking method gives the adsorbent certain mechanical strength, and provides a basis for regeneration and circulation of the adsorbent; the nitrogen-rich polyethylene imine and the high-porosity UiO-66-NH2 greatly enrich the active adsorption sites of the adsorbent, and significantly improve the adsorption capacity of the adsorbent for Cr(VI); and the removal rate of the adsorbent for Cr(VI) is up to 100% in the detection limit range of Cr(VI).

A system for removing nitrogen from a hydrocarbon feed stream has a heat exchanger system that cools the hydrocarbon feed stream. A feed separator separates a cooled feed stream from the heat exchanger system into a methane-enriched fluid and a first nitrogen-enriched fluid. A helium separator receives cooled first nitrogen-enriched fluid from the heat exchanger system and produces a first helium-enriched fluid and a helium separator bottoms fluid and directs the first helium-enriched fluid to the heat exchanger system. A warm helium stripper receives the helium separator bottoms fluid from the helium separator and first nitrogen-enriched fluid from the feed separator as a stripping fluid and produces a second helium-enriched fluid and a warm helium stripper bottoms fluid and directs the warm helium stripper bottoms fluid to the distillation column. A cold helium stripper receives the cooled first helium-enriched fluid from the heat exchanger system and second helium-enriched fluid from the warm helium stripper as a stripping fluid and produces a crude helium fluid and a cold helium stripper bottoms fluid and directs the cold helium stripper bottoms fluid to the distillation column. A reflux compressor compresses at least a portion of the warmed nitrogen-enriched vapor stream from the heat exchanger system. A reflux accumulator receives the cooled nitrogen-enriched fluid stream from the heat exchanger system and produces an overhead reflux-drum vapor stream and a reflux fluid stream and directs the reflux fluid stream to the distillation column. The distillation column produces a nitrogen-enriched vapor stream and a column bottoms liquid stream.

The invention discloses nitrogen-doped carbon aerogel and a preparation method and application thereof.The method comprises the steps that cobalt salt and nickel salt are added into a biomass solution and stirred to be dissolved, and a mixed solution containing metal ions is obtained; adding a nitrogen-rich organic matter into the mixed solution containing the metal ions, and continuously stirring to prepare a mixed solution containing the metal ions and the nitrogen-rich organic matter; the method comprises the following steps: adding a cross-linking aid into a mixed solution containing metal ions and nitrogen-rich organic matters, and stirring to form gel; after directional freezing is conducted on the gel, freeze drying is conducted, and doped precursor aerogel is prepared; and placing the doped precursor aerogel in an inert atmosphere, and carrying out heat treatment to prepare the nitrogen-doped carbon aerogel. According to the method, a multi-stage magnetic structure is constructed through in-situ reduction growth of magnetic nanowires and nanoparticles on a carbon skeleton in an in-situ growth method, and efficient dissipation of electromagnetic waves is performed through the synergistic effect of multi-dimensional magnetic loss of the nanowires and the nanoparticles and conductive loss and polarization loss of carbon aerogel.

The present invention belongs to the technical field of silk materials, and specifically relates to a method for preparing high-strength and fine-denier silk using nitrogen-rich hyperbranched molecules. The present invention adopts aromatic amine and acid to prepare nitrogen-rich hyperbranched molecules through a one-step hydrothermal method through polymerization reaction. The nitrogen-rich hyperbranched molecules prepared by the present invention will not cause harm to the growth and development of silkworms and the environment during the feeding and silkworm rearing process. The present invention continuously feeds silkworms with artificial feed containing nitrogen-rich hyperbranched molecules from the end of the fourth instar to the beginning of the fifth instar when silk protein is synthesized. Through the absorption of nitrogen-rich hyperbranched molecules by the silkworms, a large amount of nitrogen-rich hyperbranched molecules are present in the silkworms' bodies. During the synthesis of silk protein, the nitrogen-rich hyperbranched molecules are directly embedded in the silk protein, thereby achieving the purpose of preparing high-strength and fine-denier silk containing nitrogen-rich hyperbranched molecules.

The invention relates to the technical field of grain and oil by-product high-value utilization and food functional ingredient preparation, in particular to a nitrogen-rich mesoporous carbon-based cholesterol adsorption ingredient as well as a preparation method and application thereof. According to the method, soybean meal and rice bran are taken as a carbon source and an endogenous nitrogen source, and urea or melamine is compounded as an exogenous nitrogen-rich precursor, so that an internal-external synergistic nitrogen-rich system is constructed; the method comprises the following steps: compounding a zinc chloride or potassium hydroxide chemical activator with a ferric chloride catalytic graphitizing agent to form a nitrogen-rich-catalytic synergistic conversion system; the method comprises the steps of raw material pretreatment, nitrogen-rich slurry preparation, catalytic activation precursor preparation and the like. The prepared carbon-based ingredient has a developed mesoporous structure and high-content alkaline nitrogen-containing functional groups, and is large in cholesterol adsorption capacity and high in selectivity, and the raw materials are grain and oil processing byproducts, so that the cost is low, and the carbon-based ingredient is green and environment-friendly; the preparation process has the advantages of controllable parameters and good repeatability, is suitable for industrial production, and provides a new technical path for the development of functional food ingredients for reducing blood fat.

The invention relates to oxygen enrichment equipment and an oxygen enrichment process thereof, and relates to the technical field of jet propulsion devices.The oxygen enrichment equipment comprises an oxygen enrichment disc, an air inlet is formed in one axial side of the oxygen enrichment disc, and a plurality of rich nitrogen separation outlets are formed in the other axial side of the oxygen enrichment disc; a plurality of centrifugal separation flow channels are formed in the oxygen enrichment disc and are sequentially arranged at intervals in the circumferential direction of the air inlet, one end of each centrifugal separation flow channel in the length direction of the centrifugal separation flow channel communicates with the air inlet, and the other end of each centrifugal separation flow channel penetrates through the oxygen enrichment disc in the direction away from the air inlet; the rich nitrogen separation outlets and the centrifugal separation flow channels are arranged in a one-to-one correspondence manner, and the rich nitrogen separation outlets communicate with the corresponding centrifugal separation flow channels; the air suction fan is located in the air inlet, and the air suction fan is coaxially connected with the oxygen enrichment disc; and the driving end of the centrifugal driver is coaxially connected with the oxygen enrichment disc. According to the oxygen enrichment equipment, a mechanical rotary separation mode is adopted, other consumables are not introduced, the later maintenance cost of the oxygen enrichment fan is reduced, and the fault rate of the oxygen enrichment fan is reduced.

The application discloses a kind of microbial compound microbial inoculant and preparation method thereof, the microbial compound microbial inoculant includes microbial inoculum and its fermentation product and carrier;The microbial inoculum includes bacillus subtilis and bacillus licheniformis;The carrier is nitrogen-rich grafted biochar;The nitrogen-rich grafted biochar is prepared after grafting acrylic acid and modified monomer after being modified by nitrogen-rich biochar.The microbial compound microbial inoculant provided in the application can significantly improve the adsorption capacity and flocculation capacity of the microbial inoculant for particles in wastewater by compounding microbial inoculum with excellent flocculation capacity with charge-modified and adsorbed carrier to make microbial inoculant, thereby effectively reducing the content of COD components, ammonia nitrogen and total phosphorus in wastewater, and can be widely applied in the field of wastewater treatment.

This invention discloses a method for preparing high-nitrogen-content nitrogen-doped porous carbon with multiple nitrogen-rich units and its applications, belonging to the field of porous carbon materials. This invention uses a triazine containing a triyne group as the crosslinking center and a pyrazine containing a diazid group as the crosslinking arm. The two react via click chemistry to form a triazole structure, constructing a nitrogen-doped porous polymer with multiple nitrogen-rich units. The nitrogen content is controllable, high, and uniformly distributed, and the nitrogen-containing structure exhibits high stability, resulting in a higher residual nitrogen content after activation and carbonization, thereby improving the CO2 adsorption selectivity of the porous carbon. The nitrogen-doped porous polymer, through activation and carbonization, yields high-nitrogen-content nitrogen-doped porous carbon with multiple nitrogen-rich units, exhibiting high yield, adsorption capacity, selectivity, and reusability, and has broad application prospects in adsorption, catalysis, and membrane separation.

The invention belongs to the technical field of energetic materials, and particularly discloses a high-throughput design method for a crystal structure of a ternary nitrogen-rich energetic material under high pressure, which is characterized in that specific dominant element components of the ternary energetic material are constructed based on an electronic counting rule, and a dominant structure search method is established in a structure search framework. Comprising the following steps: determining search components; searching a structure; calculating a convex hull graph; evaluating energy density and mass density; structure screening; evaluating the stability; analyzing an electronic structure; and evaluating detonation performance. According to the high-throughput design method for the crystal structure of the ternary nitrogen-rich energetic material under the high pressure, the search range is greatly narrowed in an extremely large search space phase of a ternary compound, the search precision and the search efficiency under specific proportioning components are improved, and the high-throughput design method for the crystal structure of the ternary nitrogen-rich energetic material under the high pressure is realized. And the crystal structure design time cost and the computing resource cost of the ternary nitrogen-rich energetic material are greatly reduced.

The invention belongs to the technical field of biochar materials, and particularly relates to nitrogen-rich porous carbon, a preparation method thereof and application of the nitrogen-rich porous carbon in ibuprofen adsorption. The method comprises the following steps: carrying out pyrolytic reaction on duckweed in a nitrogen atmosphere to obtain pyrolytic biochar; mixing the pyrolytic biochar, inorganic strong base and water to obtain a suspension of the pyrolytic biochar; drying the turbid liquid of the pyrolytic biochar to obtain a dipping mixture; and activating the impregnated mixture in a nitrogen atmosphere to obtain the nitrogen-rich porous carbon. According to the present invention, the fixation and the enrichment of the duckweed endogenous nitrogen and the pore forming of the biochar are achieved, and the high nitrogen element content in the obtained nitrogen-rich porous carbon is ensured while the preparation of the high-porosity porous structure can be achieved, such that the obtained nitrogen-rich porous carbon has the good adsorption property on the ibuprofen, and the resourceful treatment of the duckweed is further achieved.

The application discloses a preparation method and application of a multi-level pore biomass activated carbon, and belongs to the technical field of activated carbon preparation. The method uses a mixture of nitrogen-rich agricultural and forestry wastes and industrial by-products as raw materials, optimizes a pretreatment process, innovates a composite activation system, and controls carbonization-activation parameters, so that a biomass-based activated carbon rich in nitrogen elements and having multi-level pores is prepared. The nitrogen elements in the raw materials can be used for nitrogen doping of the activated carbon in the carbonization-activation process. The application effectively solves the problems of low utilization rate of raw materials, single pores and the like in the existing activated carbon preparation process, solves the problem of difficult treatment of industrial by-products, simultaneously simplifies the preparation process of the nitrogen-rich activated carbon, has economic value and environmental protection benefits, and can be widely applied to the fields of water treatment, carbon capture and deep treatment of industrial wastewater and the like.

The invention belongs to the field of organic waste resource utilization, and particularly relates to a system for reducing ammonia emission in compost and producing a nitrogen-rich organic fertilizer and a use method of the system. Comprising a condenser pipe, a composting reactor main body, a gas flowmeter and an aeration pump, the condensation pipe is communicated with the top of the composting reactor main body; the composting reactor main body is connected with the gas flow meter; the gas flow meter is connected with the aeration pump; the method is low in operation cost, good in ammonia emission reduction effect and suitable for large-scale application, and the nitrogen content in compost products can be remarkably increased.

The invention discloses a nitrogen-rich hollow carbon nanosphere filled Prussian blue analogue composite burning rate catalyst, which is prepared by the following steps: reacting tetraethyl orthosilicate, resorcinol, melamine, formaldehyde and ammonia water in a mixed solvent of water and ethanol to generate nitrogen-rich carbon spheres, then calcining and etching to form nitrogen-rich hollow carbon nanospheres, and finally preparing the nitrogen-rich hollow carbon nanospheres into the Prussian blue analogue composite burning rate catalyst. And respectively filling transition metal nitrate and potassium ferricyanide by using a two-step ultrasonic method, and generating the Prussian blue analogue in the cavity. The nitrogen-rich hollow carbon nanospheres are filled with the Prussian blue analogues through a two-step ultrasonic method, the Prussian blue analogues are limited to the nanometer size through the confinement effect of the nitrogen-rich hollow carbon nanospheres, and meanwhile the synergistic catalysis effect of the nitrogen-rich hollow carbon nanospheres and the Prussian blue analogues is enhanced; the obtained composite burning rate catalyst has a good catalytic effect on AP.

A system and methods for removing nitrogen from a natural gas or liquid natural gas stream. More particularly, a system and method for removing nitrogen from a natural gas feed stream that uses a two-column system with a first column operating at a pressure that is lower than the operating pressure of the second column. A first nitrogen-enriched vapor stream from the first column is compressed and cooled and the resulting stream is then directed to the second column, which produces a second nitrogen- enriched vapor stream and a second methane-enriched liquid stream. Cooling in the system is provided in heat exchangers that warm a first methane-enriched liquid stream from the first column and the second methane-enriched liquid stream from the second column.

The application belongs to the field of engine cooling, and particularly relates to a dual-working fluid regenerative cooling system and method. The dual-working fluid regenerative cooling system comprises a dual-working fluid regenerative cooling module, an ammonia cracking product separation module and an energy comprehensive utilization module. The dual-working fluid regenerative cooling module comprises an ammonia supply device, a kerosene supply device and a double-layer regenerative cooling channel. The ammonia cracking product separation module comprises a membrane separator and a pressure swing adsorption unit. The energy comprehensive utilization module comprises a power generation device connected with the nitrogen-rich gas outlet. The application builds a closed-loop system integrating efficient thermal management, stable combustion and energy efficient utilization by means of ammonia and kerosene dual-working fluid cooling, ammonia cracking hydrogen production and nitrogen-rich gas power generation.

The invention belongs to the technical field of biomass utilization, and particularly relates to a process for preparing magnetic charcoal rich in nitrogen / iron oxide through rapid pyrolysis activation and a method for efficiently adsorbing phenol through the magnetic charcoal. The method comprises the following steps: by taking biomass as a raw material, crushing, cleaning and drying, impregnating with a ferric trichloride solution, drying at a low temperature to prepare an iron-containing precursor, and then quickly pyrolyzing in an ammonia gas atmosphere to generate nitrogen / iron oxide-rich magnetic biochar which has a developed pore structure and loaded iron oxide and ferroferric oxide particles. The adsorbent is short in preparation period, low in energy consumption and high in efficiency, and the specific surface area and surface functional group distribution are further improved by optimizing pyrolysis conditions, so that the adsorption rate and capacity of phenol are remarkably enhanced. The prepared iron-nitrogen co-doped biochar is low in cost, efficient and renewable, a new path is provided for organic pollutant treatment, and high-value utilization of biomass waste and economic treatment of water pollution are achieved.

The invention discloses nitrogen-doped carbon nanotube array loaded magnetic carbon aerogel and a preparation method thereof.The method comprises the steps that cobalt salt and nickel salt are evenly dissolved in a biomass precursor aqueous solution, and a homogeneous solution is formed; adding a cross-linking aid to construct a three-dimensional network, and wrapping metal ions; performing freeze drying after directional freezing to form a directional porous structure; carrying out heat preservation and carbonization, converting the biomass into a porous carbon matrix, and reducing the cobalt / nickel salt into a uniformly embedded CoNi alloy; through two-stage heat treatment, the nitrogen-rich organic matter is decomposed to release a nitrogen source, and the vertical carbon nanotube array grows in situ. The material integrates CoNi alloy magnetic loss, carbon matrix dielectric loss and multistage structure scattering effect, realizes dielectric-electromagnetic cooperation, optimizes impedance matching, avoids strong surface reflection caused by high conductivity of a single carbon material, introduces polarization loss, widens an absorption frequency band, has excellent broadband efficient electromagnetic wave absorption performance, and is suitable for a complex electromagnetic environment.

The invention discloses a pyrazinyl nitrogen-rich hydrophobic porous organic cage material as well as a preparation method and application thereof, and belongs to the technical field of porous organic cage materials. Resorcinol calix [4] arene, pyrazine-2, 5-diamine, an organic solvent and the like react to obtain the pyrazinyl nitrogen-rich hydrophobic porous organic cage material. A nitrogen-rich pyrazine ring is introduced into the material to enhance the SF6 adsorption capacity; the introduction of isobutyl endows the material with strong hydrophobicity, so that the material keeps stable structure and unchanged adsorption performance under high humidity. The obtained material is good in water and chemical stability, the SF6 adsorption capacity reaches up to 53.6 cm < 3 > g <-1 > under the conditions of normal temperature and normal pressure of 25 DEG C and 1 bar, the adsorption capacity ratio of SF6 to nitrogen (N2) reaches 20.02 in a creative record, and the adsorption capacity ratio reaches the maximum value in all reported porous organic cage materials at present. The pyrazinyl nitrogen-rich hydrophobic porous organic cage material provided by the invention provides a new thought for efficient adsorption and separation of SF6.

The present application relates to the sewage treatment technical field, specifically relates to a kind of preparation and application in water purification bacteriostasis of nitrogen-rich carbide piezoelectric composite material.The present application is coupled by high molecular piezoelectric polymer and nitrogen-rich carbide, and modified piezoelectric composite material with high piezoelectric catalytic activity is formed, and the efficient degradation of various organic pollutants in water is realized by driving force induction piezoelectric effect, and has excellent bacteriostatic performance.The preparation process in the present application is simple, green, low cost, material mechanical strength is high, degradation process is free of secondary pollution, easy to mass production, the method can effectively solve water pollution problem, help ecological environment protection, and escort for human health.

The present application relates to a kind of methods for regulating the morphology of nitrogen-rich metal organic framework material using organic template agent, belong to the technical field of micro-nano material synthesis.The purpose of the present application is to solve the problems of single morphology, uneven particle size distribution and other problems of nitrogen-rich MOFs micro-nano particles obtained by the prior art, and to provide a method for regulating the morphology of nitrogen-rich metal organic framework material using organic template agent;By using organic template agent, the reaction solvent, reaction temperature and reaction time are controlled, the ratio of organic ligand, metal salt and organic template agent is controlled, so that the morphology and size of MOFs micro-nano particles are effectively controlled, and spherical, flower-like, snowflake-like, interpenetrating, cubic or sheet-like morphology can be obtained, with high yield, high repeatability, and morphology transformation of MOFs material is simultaneously controlled.