5526results about How to "Large specific surface area" patented technology

The invention discloses immobilized bacteria-algae microspheres, a preparation method thereof and application of the immobilized bacteria-algae microspheres in removal of ammonia nitrogen and total phosphorus in aquaculture water. The preparation method comprises the following steps: adding polyvinyl alcohol and sodium alginate into deionized water, heating and sterilizing while fully dissolving polyvinyl alcohol and sodium alginate to obtain an embedding medium; adding the iron modified biochar powder into a mixed solution of chlorella and photosynthetic bacteria for adsorption to obtain a bacteria-algae-biochar mixture; adding the bacteria-algae-biochar mixture into an embedding medium to form a gel solution; adding the gel solution into a cross-linking agent for cross-linking, and after cross-linking, separating a solid and cleaning to obtain immobilized bacteria-algae microspheres; the preparation method of the iron-modified biochar powder comprises the following steps: adjusting the pH value of a mixed solution containing biochar powder, Fe < 2 + > and Fe < 3 + > to 9.5-10.5, carrying out heat preservation stirring at 75-85 DEG C for 1-5 hours, carrying out solid-liquid separation, taking a solid, washing, and drying to obtain the iron-modified biochar powder.

The invention belongs to the field of photovoltaic glass coatings, and particularly relates to a super-hydrophilic anti-reflection wear-resistant self-cleaning coating for room-temperature curing of photovoltaic glass, which takes nano silicon dioxide sol as a main film-forming agent to cure and form a film and comprises the following raw materials in parts by weight: 55-90 parts of deionized water, 9-20 parts of nano silicon dioxide sol, 1-10 parts of a silane coupling agent and 0.001-1 part of nano titanium dioxide. The coating is prepared from the following components in parts by weight: 0.01-1 part of a surfactant, 0.01-1 part of modified polyvinyl alcohol, 0.01-1 part of water-based acrylic resin, 0.001-1 part of an antistatic agent, 1-5 parts of a curing agent, 1-5 parts of a flatting agent and 0.1-1 part of a wear-resistant agent. The super-hydrophilic anti-reflection wear-resistant self-cleaning coating has super hydrophilicity, the water contact angle is below 10 degrees, the hydrophilicity, the antistatic property, the anti-reflection property, the wear resistance and other properties of glass can be remarkably improved, and when the super-hydrophilic anti-reflection wear-resistant self-cleaning coating is applied to photovoltaic module glass, the photoelectric conversion efficiency in photovoltaic power generation can be improved.

The invention relates to the technical field of ceramics, and particularly discloses a preparation method of a bamboo charcoal pot ceramic material, which comprises the following steps: weighing the following raw materials in parts by weight: 25-30 parts of bamboo charcoal powder, 20-25 parts of quartz powder, 10-15 parts of silicon carbide, 10-14 parts of a whisker readjustment-based bonding agent, 8-12 parts of albite, 7-11 parts of a magnesium oxide-doped modified filling agent and 5-10 parts of clay. According to the bamboo charcoal pot ceramic material disclosed by the invention, the bamboo charcoal powder is matched with the quartz powder, silicon carbide, albite and clay raw materials, and the impact resistance, the heat-conducting property and the wear-resisting property of the product are harmoniously improved by adding the continuous balance agent based on whisker readjustment and the filling agent modified by doped magnesium oxide and blending and matching the raw materials; and the product has remarkable cold and heat resistance and scrubbing stability.

The invention discloses a sulfur-manganese composite autotrophic denitrification filler as well as a preparation method and application thereof, and belongs to the technical field of environmental functional materials and polluted water treatment. The sulfur-manganese composite autotrophic denitrification filler contains manganese salt, a sulfur-based component and a cement-based component, the manganese salt comprises one or more of manganese carbonate, calcium manganese ore and rhodochrosite; the sulfur-based component comprises sulfur and sulfur manganese ore; the cement-based component comprises cement, fly ash pottery sand, silica fume, blast furnace slag and metakaolin; the cement comprises one or more of Portland cement, iron aluminate cement and sulphoaluminate cement. The nitrogen removal efficiency of the sulfur-manganese composite autotrophic denitrification filler is superior to that of a sulfur autotrophic denitrification system, the sulfate concentration and nitrite nitrogen accumulation in effluent are remarkably reduced, the service life of the filler is prolonged, and the efficient utilization rate of the material is improved.

The invention relates to a preparation method of antibacterial and anti-mite healthy cotton fibers based on compounding of copper-silver alloy and graphene fibers. The preparation method comprises the following steps: synthesizing Cu-Ag alloy with a pomegranate-shaped structure, preparing copper-silver core-shell double-metal nanoparticles, preparing a copper-silver double-metal core-shell nanoparticle material, performing surface modification on a copper antibacterial agent, preparing a nano anti-mite antibacterial finishing agent, preparing a graphene / carbon nanofiber composite material, and preparing the antibacterial anti-mite healthy cotton fiber. A vacuum hot pressing method and a sintering method are creatively combined, and the prepared antibacterial anti-mite healthy cotton fiber endows bedding with excellent antibacterial, anti-mite and various healthy functions and has the advantages of excellent antibacterial performance, efficient anti-mite function, improved tensile strength and the like.

The invention provides an Al-Mg alloy negative electrode current collector, a preparation method thereof and a negative-electrode-free sodium metal battery, and relates to the field of batteries. The preparation method of the Al-Mg alloy negative electrode current collector comprises the following steps: sputtering magnesium on the surface of an aluminum foil by adopting a magnetron sputtering mode, and forming a magnesium coating on the aluminum foil; and calcining the aluminum foil with the magnesium plating layer to obtain the Al-Mg alloy negative electrode current collector, and the Al-Mg alloy negative electrode current collector comprises an aluminum substrate layer and an Al-Mg alloy layer located on the aluminum substrate layer. According to the present invention, the Al-Mg alloy with characteristics of high sodium affinity and stable three-dimensional structure is introduced into the negative electrode current collector so as to induce the uniform deposition of sodium, inhibit the growth of sodium dendrites, reduce the loss of active sodium, and prolong the cycle life of the battery; the negative electrode current collector can be used in a sodium metal battery without a negative electrode. In addition, the method has the advantages of being easy to operate and low in raw material cost, and large-scale application and popularization are facilitated.

The invention provides an anode foil and a preparation method thereof, and relates to the technical field of capacitors. The preparation method comprises the following steps: preparing mixed aluminum slurry which comprises spherical aluminum powder, spherical aluminum oxide powder, a solvent, a binder and a dispersing agent; coating the surface of an aluminum foil substrate with the mixed aluminum slurry, and drying the aluminum foil substrate containing the mixed aluminum slurry to obtain a powder layer aluminum foil blank; sintering the powder layer aluminum foil green body to obtain a sintered foil; performing shot blasting treatment on the sintered foil to obtain an initial anode foil; cleaning and boiling the initial anode foil; and performing formation treatment on the boiled initial anode foil to obtain a target anode foil. According to the preparation method disclosed by the invention, the bending strength of the anode foil can be improved, and large-scale application of the anode foil can be realized.

The invention discloses an injection filler and a preparation method and application thereof, the filler is polycaprolactone particles, the polycaprolactone particles are spherical particles, the particle size of the spherical particles is 20-100 [mu] m, and the polycaprolactone particles have rough surfaces or unsmooth surfaces. The polycaprolactone microspheres have rough surfaces or unsmooth surfaces, so that the contact area with cells is increased, the adhesion ability and residence time of the cells are improved, the affinity of the polycaprolactone microspheres is improved, and the growth of collagen can be stimulated and accelerated. In the preparation process, the dosage of each component is scientifically screened, and on the basis of controlling the viscosity of a water-phase solution, the spherical polycaprolactone particles which are regular, rough in surface and uniform in particle size are obtained in cooperation with a rapid membrane emulsification method.

The invention discloses a hollow aramid aerogel fiber with a hierarchical pore structure as well as a preparation method and application of the hollow aramid aerogel fiber. The preparation method comprises the following steps: by using a coaxial wet spinning method, using a spinning solution A as a shell spinning solution and a spinning solution B as a core spinning solution, simultaneously extruding the spinning solution A and the spinning solution B into a coagulating bath, carrying out in-situ dynamic sol-gel conversion, and then carrying out specific drying to obtain the hollow aramid aerogel fiber with the hierarchical pore structure, the middle of the hollow aramid fiber aerogel fiber with the hierarchical pore structure is of a hollow structure, and the fiber wall is of the hierarchical pore structure. The prepared hollow aramid fiber aerogel fiber with the hierarchical pore structure has the advantages of being large in specific surface area and high in porosity, the inner diameter, the outer diameter and the wall thickness of the fiber and the size, the morphology and the pore size distribution of pores in the fiber wall can be adjusted and controlled, the preparation method has universality, the preparation process is simple, and large-scale production is easy to achieve.

The invention belongs to the technical field of soil improvement, and discloses a wormcast biochar-based soil conditioner as well as a preparation method and application thereof. The soil conditioner is prepared from the following raw materials: modified charcoal, wormcast, a seaweed fertilizer, a microbial agent, vermiculite, humic acid, urea and coal gangue. The modified biochar and the wormcast are used as main components, the modified biochar is loaded with potassium and phosphorus, and potassium and phosphorus elements can be slowly released and provided; on one hand, plasma modification can generate oxygen-containing groups and increase active sites, so that heavy metals are complexed, and the removal capacity of the heavy metals is improved; on the other hand, holes in the surface of the biochar can be increased, the specific surface area is increased, the adsorbability is improved, and the biochar can serve as a carrier of components such as microorganisms, wormcast and urea, so that nutrient substances are slowly released in soil. Wormcast contains some bacteria, fungi and the like, promotes plant growth and serves as organic fertilizer together with seaweed fertilizer and humic acid, and the content of organic matter and mineral matter in soil is increased.

The invention relates to a catalyst for ethylene oxide ring-opening polymerization and a preparation method thereof, and belongs to the technical field of high polymer material synthesis, and the catalyst is a composite structure based on a silicon dioxide nanoparticle loaded bimetal organic complex; a modified nitrogen-containing polydentate ligand is prepared by adopting a special method, is coordinated with metal ions through covalent bonds and is loaded on silicon dioxide nanoparticles; by utilizing the high dispersity and stability of the silicon dioxide nanoparticles and the synergistic catalytic effect of the bimetal organic complex, the catalytic effect is effectively improved, the polymerization process is accelerated, the polymerization stability is enhanced, the polymerization molecular weight is improved, and the distribution is narrow.

The invention discloses a water-retaining controlled-release fertilizer and a preparation method thereof, and relates to the technical field of controlled-release fertilizers. According to the invention, the attapulgite is modified by a phosphoric acid solution, so that the surface of the attapulgite has acidic groups, and the groups can be adsorbed with positive ions in the fertilizer, so that nutrients are adsorbed and fixed on the surface of the attapulgite, and the speed of releasing the fertilizer nutrients into a soil solution is delayed; meanwhile, the modified attapulgite and some nutritional ingredients in the fertilizer can form indissolvable compounds, so that the nutrients are slowly released along with gradual dissolution of the compounds, and the fertilizer efficiency of the fertilizer is prolonged; when the modified attapulgite encounters water, the entering speed of water can be effectively slowed down, dissolution of nutrients in fertilizer particles is controlled, and then the slow and controlled release effect is achieved; and the modified attapulgite can regulate the pH value of the soil, so that the soil environment is more suitable for plant growth and slow release of fertilizer nutrients.

The invention provides a preparation method of a polyester loose nanofiltration membrane, and belongs to the technical field of nanofiltration membrane preparation. The preparation method provided by the invention comprises the following steps: dissolving a water-phase monomer in a sodium hydroxide solution to obtain a NaOH solution containing the water-phase monomer; soaking an ultrafiltration membrane in the NaOH solution containing the aqueous phase monomer to obtain an ultrafiltration membrane supporting layer; contacting the ultrafiltration membrane supporting layer with a trimesoyl chloride solution, and carrying out interfacial polymerization reaction to obtain a primary nanofiltration membrane; and carrying out heat treatment on the primary nanofiltration membrane to obtain the polyester loose nanofiltration membrane. The water-phase monomer is a compound which has a non-planar distorted structure and simultaneously contains phenolic hydroxyl groups and alcoholic hydroxyl groups. The method provided by the invention is simple and easy to implement, relatively low in required cost and beneficial to realizing large-scale industrial production of the high-efficiency nanofiltration membrane. The polyester loose nanofiltration membrane prepared by the preparation method disclosed by the invention has relatively high permeation flux, and meanwhile, a relatively high Na2SO4 retention rate can be kept.

The invention discloses an internal circulation rotating impinging stream electro-catalysis device and method for treating organic wastewater, and belongs to the technical field of sewage treatment equipment. The upper part of an inner cavity of an electrochemical reactor of the device is an electrochemical reaction area, and the lower part is a rotational flow generation area; the electrochemical reaction area comprises an outer ring anode, an annular net-shaped cathode, an inner ring anode and a central fixing shaft which are sequentially and coaxially sleeved from outside to inside, and the rotational flow generation area comprises an inner spiral generator and an outer spiral generator which are arranged on a spiral central shaft in a sleeving manner. The impinging stream technology and the electro-catalysis technology are combined, internal circulation impinging stream efficient treatment on organic wastewater is achieved through the rotational flow generation area, the device has the advantages of being high in treatment efficiency, small in occupied space, low in operation energy consumption and the like, the problem that bubbles adhere to the surface of an electrode can be solved, strong turbulent flow is formed through impinging, reaction dead zones are reduced, and the service life of the device is prolonged. Mass transfer in the electrochemical degradation device is enhanced, and the purposes of automatic operation and efficient degradation are achieved.

The invention relates to the technical field of building coatings, in particular to an aerogel-based anti-condensation coating. The aerogel-based anti-condensation coating is prepared from the following components in percentage by weight: 30 percent to 45 percent of deionized water, 0.1 percent to 1.0 percent of cellulose, 5 percent to 10 percent of powder, 25 percent to 35 percent of emulsion, 0.5 percent to 3.0 percent of aerogel, 15 percent to 30 percent of hollow glass beads and 1 percent to 2 percent of auxiliaries. By introducing the aerogel and the hollow glass beads, especially the hollow glass beads subjected to surface modification by fluorinated acrylate and poly (N-isopropylacrylamide), the anti-condensation performance of the coating is remarkably improved, and the characteristics of high specific surface area and low density of the aerogel are remarkably improved; according to the present invention, the coating material can maintain the excellent anti-condensation effect in the wide temperature range (including the rapid change of the day and night temperature difference and the extremely low cold fluid temperature environment) under the combined action of the hollow structure of the hollow glass bead and the low wettability after the modification, such that the initial dew point time is substantially prolonged, and the condensation amount is strictly controlled to the low level.

The invention provides a chemical restoration method for treating heavy metal-polluted terrain soil by ferromagnetic artificial nucleuses. In a ferromagnetic artificial nucleus soil restoration method, the ferromagnetic artificial nucleuses are applied to heavy metal-polluted soil; soil above a heavy metal pollution depth is overturned by cultivation equipment to uniformly mix with the ferromagnetic artificial nucleuses; and after heavy metal can be dispersed from the soil to the artificial nucleuses by a period of time, the soil containing the artificial nucleuses is overturned by using the cultivation equipment to increase the change of the artificial nucleuses contacting with other soil. After the soil overturning procedure is repeated by multiple times, the cultivation equipment provided with magnets can be used for separating the ferromagnetic artificial nucleuses, absorbed with the heavy metal, from the polluted soil; and the content of the heavy metal of the polluted soil is reduced due to shifting-out of the ferromagnetic artificial nucleuses, so that the purpose of soil restoration is gradually achieved.

The invention relates to the technical field of fine chemicals, in particular to crosslinking-agent-free Pickering emulsion oil gel and a preparation method and application thereof.The preparation method comprises the following steps that S1, cellulose is subjected to TEMPO oxidation treatment and then subjected to high-pressure homogenization, and TEMPO oxidized nano cellulose is obtained; s2, mixing the TEMPO oxidized nanocellulose and lemon essential oil in proportion, and homogenizing to obtain Pickering emulsion; s3, carrying out heat preservation on the Pickering emulsion at the temperature of 70-90 DEG C for 6-12 hours to obtain Pickering emulsion gel, freezing the Pickering emulsion gel at the temperature of-80 + / -5 DEG C for 30-40 minutes until the Pickering emulsion gel is completely frozen, and carrying out freeze drying for 24-48 hours to obtain Pickering emulsion oil gel; and S4, soaking the Pickering emulsion oil gel in acetone for 6-12 hours, taking out the Pickering emulsion oil gel, and freeze-drying the Pickering emulsion oil gel for 24-48 hours to obtain the Pickering emulsion aerogel. The Pickering emulsion aerogel has better thermal stability, larger specific surface area, cumulative pore volume and average pore size, and is prepared without using a cross-linking agent for cross-linking.

The invention discloses a heat exchange structure design method based on three-period minimal curved surface space subdivision. The invention provides a heat exchange structure design method based on a three-period minimal curved surface (TPMS) structure, and aims to improve the performance of efficient heat dissipation equipment. According to the method, by generating the Gyandroid structure and conducting multi-layer subdivision, the fluid flowing path is optimized, and the heat exchange efficiency is improved. Meanwhile, by adopting the lightweight composite material for construction, the structural weight is remarkably reduced, and the composite material is suitable for high-efficiency heat dissipation application in the fields of new energy automobile battery heat management, electronic equipment, aerospace and the like. Through finite element simulation analysis, the heat dissipation performance and mechanical strength of the structure are verified, efficient heat dissipation can be achieved in a limited space, and the service life of equipment is prolonged.

The invention relates to the field of sealing strips, and discloses a low-VOC (volatile organic compound) automobile sealing strip composite PVC (polyvinyl chloride) material and a preparation method thereof, the material comprises PVC resin, ethylene propylene diene monomer, a modified mesoporous ZIF-8 nano material, composite filler and the like; the modified mesoporous ZIF-8 nano material is prepared by grafting a hydroxylated antioxidant component on the surface of the mesoporous ZIF-8 nano material by using isophorone diisocyanate, and the hydroxylated antioxidant component is prepared by reacting N-(4-anilinophenyl) maleimide with 2-mercaptoethanol; the composite filler is prepared by grafting modified nano silicon dioxide and aminated basalt fiber, the modified nano silicon dioxide is prepared from phenylphosphoryl dichloride, diethanol amine, dibutyl phosphate and isophorone diisocyanate as raw materials, and the aminated basalt fiber is prepared by modifying with an aminated silane coupling agent; the modified mesoporous ZIF-8 nano material and the composite filler are added, so that the flame retardant property, the thermal aging resistance and the mechanical property of the material are improved.

The invention provides a thick electrode and a preparation method thereof, and a lithium battery, the thick electrode comprises a current collector and an active coating, the active coating comprises an active material, a conductive agent, a dispersant and a composite binder, the composite binder comprises a binder A and a binder B, the binder A comprises at least two of sodium carboxymethyl cellulose, a polyacrylic acid binder and an acrylonitrile multipolymer, and the binder B comprises at least one of polytetrafluoroethylene and butadiene styrene rubber. The thick electrode has the characteristics of stable structure, good conductivity and high ion transmission efficiency, and the cycling stability of the battery using the thick electrode can be improved.

The invention discloses a seed layer induced FeCoNiCuMo high-entropy alloy nanocage electrocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing and reacting iron, cobalt and nickel precursors to prepare a FeCoNi nanocage catalyst as a seed layer; adding copper salt and molybdate into the seed layer solution, carrying out ultrasonic mixing, adding a pH regulator and a reducing agent, carrying out ultrasonic treatment, putting the mixed solution into liquid nitrogen, cooling, carrying out primary nucleation, naturally unfreezing, standing for nucleation, cleaning, and freeze-drying to obtain the high-entropy alloy nanocage electrocatalyst. The catalyst is used for preparing urea through CO2 and NO3 <-> electro-catalysis, can effectively adjust the matching of CO2 and NO3 <-> reaction kinetics, and has extremely high Faraday efficiency and yield for synthesizing urea through C-N coupling.

The invention relates to the technical field of heterojunction solar cells, and particularly discloses a selective electrode contact heterojunction cell preparation method and a heterojunction cell, and the method comprises the steps: carrying out the first texturing of a silicon wafer substrate, carrying out the mask layer preparation of the textured silicon wafer, and carrying out the first patterning processing of the silicon wafer. Performing slotting treatment on two sides of the silicon wafer based on picosecond laser, performing secondary texturing on the silicon wafer, placing the cleaned silicon wafer in a second texturing mixed solution so as to generate a large textured pyramid structure on the inner bottom surface of a groove in the two sides of the silicon wafer, and removing the first mask layer from the silicon wafer after secondary texturing to obtain a second textured pyramid structure; sequentially depositing a plurality of layers including an intrinsic amorphous silicon layer and the like on the two surfaces of the silicon wafer, printing a second mask layer in a counterpoint manner in other areas of the silicon wafer which is provided with the groove in the first time of patterning based on exposure and development, electroplating a copper grid line on the silicon wafer, and sequentially removing the second mask layer and a copper seed layer on the silicon wafer after electroplating the grid line; the selective electrode contact copper grid line heterojunction solar cell is obtained, the problem of grid separation of the copper grid lines is solved, and the cell efficiency is improved.

The invention relates to the technical field of sodium ion battery positive electrode materials, in particular to a carbon-coated sodium ferric phosphate pyrophosphate positive electrode material and a preparation method and application thereof.The preparation method includes the steps that carbon nanotubes and an organic carbon source serve as carbon sources to prepare two kinds of sodium ferric phosphate pyrophosphate particles, and the two kinds of particles are mixed in proportion and then sintered to obtain the carbon-coated sodium ferric phosphate pyrophosphate positive electrode material. In the carbon layer coated on the surface of the material, the carbon nanotubes and the organic carbon source exert respective conductive advantages to form a strong conductive network, so that the conductivity of the material is improved, and the overall structural rigidity of the material is enhanced.

The invention provides a method for efficiently synthesizing basic nickel carbonate, and belongs to the technical field of chemical preparation. Comprising the following steps: (1) preparing a mixed solution of sodium carbonate and sodium hydroxide; (2) under low-temperature and high-speed stirring conditions, dropwise adding a nickel salt solution into the mixed solution, adding a competitive adsorbent, adjusting the pH value of the solution, then heating, continuing stirring reaction, separating the competitive adsorbent by a magnet, centrifuging, washing and collecting prepared primary basic nickel carbonate; and (3) recrystallizing the primary basic nickel carbonate in an ethanol water solution, and drying to obtain the basic nickel carbonate. According to the preparation method disclosed by the invention, the content of impurity ions in the product is reduced, so that the high-purity basic nickel carbonate can be prepared, the synthesis efficiency is high, the production cost is relatively low, the method is green and environment-friendly, the competitive adsorbent can also be repeatedly utilized and recycled, the production cost is reduced, and the method has a wide application prospect.

The invention belongs to the technical field of super-hydrophobic materials, and particularly relates to a preparation method and application of magnetic response multifunctional super-hydrophobic biomass aerogel. The super-hydrophobic PDMS-coated CMIL-101 / CS aerogel is prepared by combining chitosan (CS), a magnetic porous carbon material (CMIL-101) and polydimethylsiloxane (PDMS) through a freeze drying technology, so that efficient oil-water separation and organic pollutant microplastic removal are realized. The aerogel utilizes magnetic response and photo-thermal characteristics, promotes oil adsorption and treats high-viscosity oil in a magnetic field, simplifies the purification process, and has important application value for water body remediation.

The invention discloses a CoFe-coated NBC composite catalyst and a preparation method and application thereof.The preparation method includes the steps that collected wheat straw is pretreated, wheat straw biomass powder is obtained after pretreatment is finished, the wheat straw biomass powder, Co (NO3) 2.6 H2O and Fe (NO3) 3.9 H2O are dissolved in water, isopropanol and ammonia water are added, the mixture is stirred to be uniform, then the solution is transferred into a high-pressure autoclave, and the CoFe-coated NBC composite catalyst is prepared through a hydrothermal method; a hydrothermal reaction is carried out, and a CoFe-coated NBC precursor is obtained after the hydrothermal reaction is finished; the CoFe-coated NBC precursor is placed in a tube furnace in the N2 atmosphere to be calcined, after calcination is finished, the material is cooled to the room temperature, then the material is taken out and ground, and the CoFe-coated NBC composite catalyst is obtained, the prepared CoFe-coated NBC composite catalyst has the high specific surface area, rich pore structures and a large number of active sites, and activation of PMS and degradation of pollutants are facilitated.

The invention provides a lignite-based supercapacitor activated carbon electrode material and a preparation method thereof, and belongs to the technical field of electrochemical power supply material preparation. The preparation method comprises the following steps: S1, performing hydrochloric acid pickling on lignite raw coal powder for X2 hours, performing hydrofluoric acid pickling for X2 hours, and heating a calcium phosphate solution for deoxidation to obtain pretreated lignite; s2, uniformly stirring and mixing the pretreated lignite, an alkaline activator and deionized water according to the mass ratio of 1: X4: (5-10) to obtain a mixture; s3, activation is conducted, the activation temperature is X1 DEG C, and the activation time is X3 h; cooling to obtain a roasted product; s4, acid pickling with diluted hydrochloric acid; the specific capacitance of the active carbon electrode material is Y F / g, wherein Y = a + b * X1 + c * X2 + d * X3 + e * X4-f * X1 * X2 + g * X1 * X3 + h * X1 * X4 + i * X2 * X3 + j * X2 * X4 + k * X3 * X4-l * X12-m * X22-n * X32-o * X42. The preparation method is simple, the cost is low, the process repeatability is good, the prepared porous carbon has a high specific surface area, and the power density and the cycling stability of the supercapacitor are improved.

The invention discloses a synthesis method and application of a Cu / Ni and Cu / Zn bimetallic conductive MOF-based catalyst for enhancing reduction of nitrate into ammonia, and relates to MOF catalyst preparation, and the synthesis method is characterized by comprising the following steps: S1, dissolving cupric acetate monohydrate and nickel acetate tetrahydrate or zinc acetate dihydrate in ultrapure water to prepare a solution A; s2, dissolving 2, 3, 6, 7, 10, 11-hexahydroxy tribenzene and ammonia water into N, N-dimethylformamide (DMF), so as to obtain a solution B; s3, mixing the solution A and the solution B, and performing ultrasonic treatment for 10-30 minutes to prepare a solution C; and S4, heating the solution C in an isothermal oven at 85 DEG C for 1-3 hours, naturally cooling to room temperature, respectively washing with deionized water and acetone for 6 times, and finally drying in a vacuum oven at 60 DEG C to obtain a dark blue crystal. The Cu / Zn and Cu / Ni bimetallic conductive MOF prepared by the method has high specific surface area, and the prepared electrode has high responsivity to nitrate ions, has a remarkable nitrate removal effect, has high removal efficiency and has high ammonia selectivity.

The invention discloses a multifunctional coating with flame retardance, bacteriostasis and electromagnetic shielding as well as preparation and application of the multifunctional coating, and belongs to the technical field of textiles. The preparation method comprises the following steps: firstly, preparing a flame-retardant solution by combining phosphorylated sodium alginate and MXene, and padding a fabric into the solution to obtain a fabric with a flame-retardant function; the preparation method comprises the following steps: preparing a flame-retardant solution, adsorbing zanthoxylum bungeanum essential oil by adopting mesoporous silica to prepare a bacteriostatic agent solution, mixing the flame-retardant solution, the bacteriostatic agent solution and polyvinylpyrrolidone to obtain a flame-retardant and bacteriostatic composite solution, and padding a fabric into the flame-retardant and bacteriostatic composite solution to obtain a fabric with flame-retardant and bacteriostatic functions; mXene solution is sprayed on the fabric with the flame-retardant and antibacterial functions to serve as an enhanced electromagnetic shielding layer, and the multifunctional fabric with the flame-retardant, antibacterial and electromagnetic shielding functions is prepared. The flame-retardant solution and the bacteriostatic agent solution are both made of bio-based materials, have the advantages of being low in price, environmentally friendly and degradable, and can also be used as coatings to be applied to multiple fields.

The invention relates to the technical field of catalysts for gas purification, in particular to a hierarchical pore metal-based catalytic adsorbent as well as a preparation method and application thereof. The invention discloses an integrated preparation method combining a sol-gel method and a template method, which comprises the following steps of: adding a template agent before forming gel, adding a proper amount of ammonia water in an aging process, accurately controlling other reaction conditions and a raw material ratio, and controlling a spatial confinement effect of the template method and a chemical reaction in a sol-gel process to obtain a sol-gel composite material. The morphology and size of the catalytic adsorbent can be accurately regulated and controlled, the hierarchical pore metal-based catalytic adsorbent with a microporous structure as a main material and mesopores and macropores as coexistence is finally prepared, the hierarchical pore structure provides rich adsorption sites and catalytic activity centers, and the hierarchical pore metal-based catalytic adsorbent has high adsorption capacity, high selectivity, good catalytic activity, good stability and easy regeneration.