36 results about "Alkaline activation" patented technology

The invention discloses a method for preparing a porous carbon material by recycling coal gasification slag and semi-coke wastewater, which comprises the following steps: by taking coal gasification fine slag as a carrier and semi-coke wastewater as a phenol source, carrying out flotation-acid leaching modification on the fine slag to purify a carbon-rich component and optimize the surface adsorption activity of the carbon-rich component; then fully adsorbing phenolic substances in the wastewater by utilizing the modified slag body; introducing a composite aldehyde cross-linking agent, and initiating an in-situ phenolic aldehyde polymerization reaction to generate a composite precursor; the precursor is subjected to high-temperature carbonization and alkali activation pore forming, and finally the porous carbon material with the characteristics of high specific surface area, rich graded pores and low ash content is prepared. According to the process, full-amount collaborative recycling of the two wastes is achieved, and the process is green and free of secondary pollution. The obtained material is high in carbon content and rich in defect structure and surface functional groups, shows excellent adsorption capacity and catalytic carrier performance, can be widely applied to the fields of deep purification of water pollutants, adsorption of volatile organic compounds, energy catalysis and the like, and has remarkable environmental protection benefits and resource economic values.

The invention provides a loess-based hydrogen sulfide adsorbent, a preparation method thereof and application of the loess-based hydrogen sulfide adsorbent in removal of hydrogen sulfide in natural gas. Loess with a specific substance content is taken as a raw material, the material is prepared through pretreatment, modification activation and extrusion molding, and modification activation comprises alkali activation, graphene oxide crosslinking and copper and zinc loading. According to the invention, specific loess is combined with a targeted modification and activation process, so that the porosity and the specific surface area are effectively improved, and a new active phase is formed and endowed with adsorption and catalytic oxidation effects. The prepared adsorbent has the remarkable advantages of low cost, high sulfur capacity, long penetration time, excellent regeneration performance and the like. In a medium-low-temperature dry desulfurization scene, HS (the concentration is reduced to 0.1 ppm or below) in natural gas can be efficiently removed, and the device is particularly suitable for small and medium-sized natural gas purification devices in various process scenes such as a fixed bed and a moving bed, and can also be expanded to various fields such as coal chemical industry, petrochemical industry, biogas purification, environmental protection and the like.

This invention relates to the field of cement technology, specifically to a fiber-reinforced high-strength cement pole and its preparation method. The pole comprises a steel wire skeleton and a conical annular pole body covering its outer circumference. The pole body is formed by centrifugal molding and curing of a cement-based composite material containing interfacially pre-complexed basalt chopped fibers. The interfacially pre-complexed basalt chopped fibers are obtained sequentially through alkaline activation, silane-nano silica treatment, polycarboxylate segment grafting, and calcium ion pre-complexation, and are added to the slurry after the cementitious material is initially moistened and before the aggregate is added. This method improves the dispersibility and interfacial bonding stability of the basalt chopped fibers in a low water-cement ratio cement matrix, thereby enhancing the pole's compressive, tensile, crack, shrinkage, and freeze-thaw resistance.

The application discloses a quaternary solid waste-based soil stabilizer (GSCP) for a base layer, which is composed of slag (GGBFS), steel slag (SSA), calcium carbide slag (CS) and phosphogypsum (PG) and has a weight ratio of GGBFS:SSA:CS:PG=56:24:12:8. The stabilizer forms C-S-H colloid and ettringite (AFt) through alkaline activation and sulfate activation, does not need to add cement or chemical activator, is used for stabilizing silty clay and steel slag mixed soil, and significantly improves the unconfined compressive strength, splitting tensile strength, water stability and freeze-thaw resistance. Compared with a traditional cement-based stabilizer, the application reduces carbon emission by 82% and cost by 31.25%, provides a low-carbon and economical solution for road engineering, and is suitable for the base layer and the subbase layer of a secondary road or above.

The invention discloses a preparation method and application of a modified quartz sand adsorption material, and relates to the technical field of quartz sand adsorption materials.The preparation method comprises the following working steps that S1, alkali activation treatment is conducted; step S2, silanization modification; step S3, potassium persulfate activation; quartz sand is subjected to surface modification through three-step modification treatment, wherein a sodium hydroxide solution is adopted to activate the surface of the quartz sand, and hydroxyl groups are introduced; then, gamma-aminopropyltriethoxysilane (KH550) is used for carrying out silanization modification, and an amino functional group is grafted; finally, after amino is activated through potassium persulfate (K2S2O8), 2-acrylamido-2-methylpropanesulfonic acid (AMPS) is grafted, a sulfonic functional group is introduced, and a new group is introduced to modify the quartz sand, so that the adsorption capacity of the quartz sand as a seed crystal to calcium fluoride in a crystallization-induced coupled fluidized bed system is improved, and the effluent turbidity in the fluidized bed system is reduced. Compared with other seed crystals, the calcium fluoride adsorption capacity is higher, and the effluent turbidity is lower.

The invention provides a silane deposition silicon-carbon composite material as well as a preparation method and application thereof, and belongs to the technical field of lithium battery materials. The preparation method comprises the following steps: performing in-situ reaction on zinc salt, dimethylimidazole and a pore-forming agent to obtain a first precursor; and after carbonization treatment, alkali activation is carried out, and then vapor deposition is adopted to obtain the silane deposition silicon-carbon composite material. The prepared silane deposition silicon-carbon composite material has good stability and mechanical strength, hierarchical pore structure distribution and high-capacity ultra-long circulation. The method can solve the problems that existing vapor deposition silicon-carbon is poor in structural stability, and pores of a carbon matrix obtained through traditional ZIF-8 carbonization are prone to collapse.

The invention discloses an underwater super-oleophobic film for oil field logging and a preparation method of the underwater super-oleophobic film, and belongs to the technical field of functional film materials and logging tool surface protection. The method comprises the following steps: carrying out decontamination, degreasing and alkaline activation on the outer surface of a logging instrument, forming a film on the surface of a substrate, grafting a modified chitosan solution, and applying gamma-ray irradiation in a wet acid environment to realize three-dimensional cross-linking among chitosan molecular chains, so as to obtain an organic base film with hydrophilicity and adhesive force. And then immersing the organic base membrane into a mineralization solution obtained by dispersing calcium carbonate, bubbling carbon dioxide and carrying out solid-liquid separation, so that carbonate is subjected to induced nucleation and controlled growth on the surface of the membrane to form an inorganic mineralization layer, and an organic-inorganic hybrid membrane with a micro-nano coarse structure is constructed. The thin film shows underwater super-oleophobic and low-adhesion characteristics in a saline water environment, has mechanical strength and anti-scouring capacity, can reduce pollution of oil stains to a logging instrument shell and signal attenuation, and improves logging data reliability.

The invention discloses microwave activated red mud-biomass solid waste magnesium oxychloride aggregate and a circulation method, and belongs to the technical field of solid waste recycling and negative carbon building materials. The method comprises the following steps: mixing Bayer process red mud and biomass solid waste according to a mass ratio of 3: 1-1: 1, and carrying out microwave activation at 500-1200 DEG C for 10-60 minutes; carrying out magnetic separation on the activated material to obtain an iron ore concentrate-biomass charcoal composite material which can be used as a wave-absorbing material, so as to obtain low-alkali activated red mud residues; 10-50 parts of the residues, 15-40 parts of light calcined magnesia powder and 15-40 parts of a magnesium chloride solution are mixed, the molar ratio of magnesium oxide to magnesium chloride is 6-9, and solid waste aggregate is obtained after forming and curing; the waste aggregate is regenerated into active powder after being subjected to heat treatment at 400-800 DEG C for 0.5-2 hours, and new aggregate can be circularly prepared. According to the method, red mud dealkalization and iron recovery, high-value utilization of biomass and carbon sequestration and stability augmentation and closed-loop circulation of aggregate are synchronously realized.

The application belongs to the technical field of biomass porous carbon material preparation, and particularly relates to a method for reducing energy consumption of a porous carbon produced by an alkali activation process and a system for realizing the method. The method comprises feeding, preheating, controllable air injection, controllable combustion, atmosphere transformation and activation, and post-treatment. The system integrates a controllable air injection system and a combustion reaction zone. By injecting 15% to 50% of the theoretical complete combustion air, the controllable combustion of volatile combustible gas generated by pyrolysis is realized. The method can directly provide part of the heat required for activation, reduce the external heating requirement, and achieve an energy saving effect of 15% to 30%. In addition, since oxygen is consumed in the combustion process, an anaerobic or reducing environment can be created and maintained in the rear part of the activation section without relying on strict equipment sealing and high-purity inert gas purging, thereby reducing the requirement for equipment airtightness and inert gas consumption.

The application belongs to the technical field of road engineering materials, and particularly discloses high-viscosity emulsified asphalt and a preparation method thereof, which comprises the following steps: S1, adjusting the pH of part of deionized water to 2-3, adding part of a composite emulsifier and a stabilizer, and stirring until completely dissolved to obtain an acidic soap solution; S2, adjusting the pH of the remaining deionized water to 9-10, adding an amino-terminated hyperbranched polyamide, an amino-terminated liquid butadiene-acrylonitrile and epoxy-modified nano silicon dioxide, and obtaining an alkaline activation solution after high-speed dispersion; S3, after heating base asphalt, pouring the base asphalt into the acidic soap solution, and obtaining initial emulsion through colloid mill shearing emulsification; S4, after cooling the initial emulsion, adding the alkaline activation solution, the remaining composite emulsifier and an epoxy resin emulsion in sequence under stirring, continuing to stir, cooling to room temperature, and filtering, and the high-viscosity emulsified asphalt is obtained.

The invention belongs to the technical field of multi-layer co-extrusion PE films, and particularly provides a high-barrier multi-layer co-extrusion PE film and a preparation method thereof. The high-barrier multi-layer co-extrusion PE film sequentially comprises the following components: an mPE layer, a bonding layer, a modified EVOH barrier layer, a bonding layer and an mPE layer. A preparation method of the modified EVOH barrier layer comprises the following steps: firstly, carrying out alkali activation and oxidation on EVOH to obtain oxidized EVOH; and respectively dispersing the oxidized EVOH, the aminated graphene oxide and chitosan in a solvent, mixing, and reacting. The preparation method of the high-barrier multi-layer co-extrusion PE film comprises the following steps: firstly preparing the bonding layer particles, then preparing the modified EVOH barrier layer particles, and finally performing multi-layer co-extrusion on the components according to a certain mass ratio. The high-barrier multi-layer co-extrusion PE film prepared by the preparation method disclosed by the invention has relatively high barrier performance.

This invention discloses a gasification slag-based composite phase multi-level porous photocatalytic material, its preparation method, and its applications. It belongs to the technical field of coal-based solid waste resource utilization and environmental pollution control. The preparation method of the gasification slag-based composite phase multi-level porous photocatalytic material includes: calcining a mixture of urea and melamine to obtain graphitic carbon nitride; mixing sodium hydroxide, water glass, and water, and aging the mixture to obtain an alkaline activation liquid; uniformly mixing gasification slag, graphitic carbon nitride, and the alkaline activation liquid to form a slurry; adding a foam stabilizer and a foaming agent to the slurry, and stirring to obtain a foamed slurry; casting the foamed slurry into a mold, curing, and then demolding to obtain a green body with a porous structure; placing the green body in an alkaline mother liquor for a hydrothermal reaction, followed by washing and drying to finally obtain the gasification slag-based composite phase multi-level porous photocatalytic material. The photocatalytic material prepared by this invention has good strength, is easy to separate and recover, and exhibits excellent adsorption and photocatalytic performance.

The invention discloses a composite modified component of a diatomite foundation and a reinforcement construction process, and relates to the technical field of foundation treatment. According to the composite modified component, original diatomite is used as a base material and matched with sulphoaluminate cement, modified nano silicon dioxide, an organic silicon water repellent, polypropylene fibers and metakaolin-gypsum auxiliary modified components, through the synergistic effect of the multiple components, the defects of high porosity and strong hydrophilicity of the diatomite are overcome, and the foundation strength and water stability are improved. The reinforcement construction technology comprises the steps of in-situ modification and steep slope area reinforcement, alkaline activation after excavation, modified soil layered compaction, three-dimensional drainage grating laying, miniature steel pipe pile-bearing platform supporting and slope surface hanging net spray-seeding planting, and an integrated system of component modification, structure supporting and ecological protection is formed. The problems that a traditional technology is poor in reinforcing effect, long in construction period and high in cost are solved, engineering stability and ecological compatibility are both considered, and the method is suitable for diatomite foundation reinforcing scenes such as roads, bridges and buildings.

The application discloses a little clinker cement activator and relates to the technical field of cement activators.The application comprises the following steps: step a: preparing an inorganic alkaline activation component: physically mixing anhydrous sodium sulfate and solid sodium silicate with a modulus of 1.0-1.5 at a weight ratio of 3:1-1:1, grinding to a specific surface area of greater than 400 m² / kg, and obtaining composite inorganic activation powder A.The application precisely solves the contradiction between the early strength development and the setting regulation of high-mixed-material cement through the synergy of the inorganic alkaline activation component and the organic setting-regulating component, sodium sulfate (Na2SO4) can quickly dissolve to provide Na⁺ and SO4 2‑ , on the one hand, improves the liquid-phase alkalinity, and activates the glass structure of slag and the like to disintegrate, and on the other hand, quickly reacts with the cement hydration product Ca(OH)2 and the aluminum phase to generate ettringite (AFt), which is the main contributor to the early strength; and the solid sodium silicate (Na2O·nSiO2) with a low modulus provides a continuous and mild alkali activation effect, and ensures the continuous growth of the mid-later strength.

The invention relates to the technical field of geosynthetic materials, and discloses a high-performance geotextile and a preparation process thereof.The high-performance geotextile takes polyvinyl alcohol and polyacrylic acid as polymer matrixes, and the interior of a fiber structure of the high-performance geotextile contains an inorganic mineral network generated through an in-situ reaction of sodium silicate and calcium salt; a polymer cross-linked network is formed through coordination of multivalent metal ions, and the two networks penetrate through each other to form a synergistically enhanced dual-network structure; the preparation process comprises the following steps: preparing the components into a spinning solution, and realizing synchronous implementation of fiber physical forming and inorganic phase in-situ generation through wet spinning; carrying out alkaline activation on the fiber to expose a reaction site, and treating with a multivalent metal ion solution to realize chemical cross-linking locking; a finished product is prepared through wet-process lapping. The problem that a polymer matrix is not water-resistant is effectively solved, and the prepared geotextile has high tensile strength, excellent water resistance and chemical corrosion resistance and high soil interface friction performance.

The invention discloses a preparation method of a ceramic-based polyamide nanofiltration membrane regulated and controlled by a molybdenum oxide interlayer, which comprises the following steps: (1) carrying out ultrasonic cleaning and strong alkali activation on a ceramic membrane, and loading a silane coupling agent to obtain a silane grafted ceramic membrane; (2) reacting the silane grafted ceramic membrane with an aqueous solution containing piperazine and a polyamine catalyst at room temperature; (3) reacting the material obtained in the step (2) with an n-hexane solution containing O-MoS2 and CTAB (cetyltrimethyl ammonium bromide) at room temperature; (4) reacting the material obtained in the step (3) with an n-hexane solution of trimesoyl chloride at room temperature; and (5) carrying out air drying and heat treatment on the material obtained in the step (4). The O-MoS2 / CTAB amphiphilic intermediate layer is introduced to the surface of the silane modified ceramic membrane, so that the wetting and diffusion behaviors of an organic phase monomer on the hydrophilic ceramic surface are effectively improved, and a polyamide separation layer is more uniform and compact.

The invention belongs to the technical field of environmental pollution treatment, and provides a method for efficiently treating organic contaminated soil leaching organic wastewater. The method comprises the following steps: crushing walnut shells, sieving, mixing with potassium hydroxide and urea, reacting for 2 hours at 500-800 DEG C under an argon condition, collecting the obtained product, and obtaining the biochar without washing. The organic polluted soil is eluted through SDS to obtain eluent containing organic pollutants, and the biochar and the PMS oxidizing agent are added into the eluted wastewater to remove the organic pollutants. According to the invention, agricultural wastes are utilized, and the prepared biochar material has a good removal effect on organic pollutants in soil leaching organic wastewater. Through the synergistic effect of biochar activation and alkali activation, the efficiency is improved by 30% compared with that of independent biochar activation, the addition amount of alkali liquor is reduced by 80%, and the biochar material has extremely high activity. The removal rate of organic pollutants in the leaching waste liquid reaches 90% or above.

The application provides a resource processing method of industrial solid waste, and particularly relates to a method for simultaneously extracting silicon and aluminum elements from graphite tailings, which comprises the following steps: mixing ammonium salt with the graphite tailings, and calcining the mixture at 250 DEG C to 500 DEG C for 0.5 h to 2.0 h to obtain a primary activated product; mixing the primary activated product with an alkaline activation additive, and calcining the mixture at 700 DEG C to 900 DEG C for 1.0 h to 3.0 h to obtain an alkali fusion product; immersing the alkali fusion product in an acid solution with a concentration of 3 mol / L to 9 mol / L, and stirring the mixture at 60 DEG C to 100 DEG C for 3.0 h to 8.0 h to obtain an acid leaching product; and filtering the acid leaching product to obtain an acid leaching filtrate rich in aluminum and an acid leaching residue rich in silicon. The application also relates to methods for preparing regenerated aluminum oxide based on the acid leaching filtrate and soil conditioner based on the acid leaching residue. The method can simultaneously realize efficient directional separation and recovery of silicon and aluminum components, and can further prepare mesoporous silicon powder which can be used as a soil conditioner to improve obstacle soil and high-purity aluminum oxide powder which can be used for refractory materials.

The invention relates to a method of recovering rare-earth in cerium-based rare-earth polishing powder waste by two-step acid leaching gradient separation, characterized by: firstly, using a one-step acid leaching treatment on cerium-based rare-earth polishing powder waste to obtain a rare-earth leaching liquor which is rich in La; secondly, the leaching residue is then processed through alkali activation and transformation process, water washing and impurity removal process, secondary acid leaching process, filtration, and recovery to obtain high purity CeO2 products; thirdly, the acid leaching liquor obtained through first acid leaching and second acid leaching process is finally precipitated by oxalic acid, filtered and calcined at high temperature to obtain rare-earth oxide mixed products, which achieves the gradient separation and recovery of rare-earths from cerium-based rare-earth polishing powder waste. The total recovery efficiency of rare-earth of this invention reaches 97% or higher, with high efficiency of rare-earth recovery, wide process applicability, and low environmental pollution.

The invention discloses a cold-bonded artificial core-shell aggregate based on decoration waste regenerated sand powder and a preparation method thereof. The cold-bonded artificial core-shell aggregate with a core-shell structure is prepared from the decoration waste regenerated sand powder as a raw material through a cold-bonding granulation method, the inner core of the cold-bonded artificial core-shell aggregate is decoration waste regenerated sand, and the outer shell of the cold-bonded artificial core-shell aggregate is geopolymer gel formed by the decoration waste regenerated micro powder and blast furnace slag powder through an alkali excitation reaction by using an alkali activator; the decoration waste regenerated sand and the decoration waste regenerated micro powder are obtained by vibrating and screening decoration waste regenerated sand powder. According to the invention, resource utilization of solid waste is realized, and environmental pollution caused by random disposal of decoration garbage is reduced; high-temperature sintering is not needed in the cold-bonding granulation process of the artificial core-shell aggregate, so that the energy consumption and the cost are reduced; the regenerated micro powder and the blast furnace slag powder are fully excited, so that the mechanical property of the cementing material is remarkably improved, and a final product has higher durability and strength.

This invention discloses a self-activated solid waste slurry and its preparation method, comprising waste slag, a solid waste cementitious material, and water. The components are expressed as follows by weight percentage or parts: 100 parts waste slag; 15-60 parts solid waste cementitious material, wherein the solid waste cementitious material consists of a silicon-aluminum rich precursor, a strongly alkaline activation source, and a rheology-modifying supplementary source, with a mass ratio of 1:(0.2-0.8):(0.1-0.4); and water. This invention eliminates the highly corrosive liquid chemical activator required in traditional alkaline activation materials, achieving self-activation through dry powder premixing of a strongly alkaline activation source, a silicon-aluminum rich precursor, and a rheology-modifying supplementary source.

The invention discloses a recycling method of an SCR (Selective Catalytic Reduction) denitration catalyst. The recycling method comprises the following steps: (1) carrying out soot blowing, washing and drying treatment on an inactivated SCR denitration catalyst to obtain a pickling material; (2) crushing the acid-washed material in the step (1), adsorbing an alkaline solution by the crushed material, and performing sealed warm activation treatment to obtain an alkali-activated material; (3) mixing the alkali activated material obtained in the step (2) with a pore-foaming agent, and carrying out molding, pore-forming, drying and roasting on the mixed material to obtain a molded catalyst; and (4) immersing the formed catalyst in the step (3) into a vanadium-containing solution for dipping, drying the dipped material, roasting in a nitrogen atmosphere, and activating in an ammonia atmosphere to obtain the SCR denitration catalyst. The inactivated SCR denitration catalyst is used as a raw material, and the prepared denitration catalyst is high in micron-sized through pore channel content, high in dust blocking resistance, good in NOx conversion effect and low in catalyst production cost.

The invention discloses a preparation method of an ion-regulated ceramic-based polyamide nanofiltration membrane, which comprises the following steps: (1) carrying out ultrasonic cleaning and strong alkali activation on a ceramic membrane, and loading a silane coupling agent to obtain a silane grafted ceramic membrane; (2) reacting the silane grafted ceramic membrane with an aqueous solution containing piperazine, alkali metal or alkaline earth metal ions and a polyamine catalyst at room temperature, and then removing the unreacted aqueous solution; (3) reacting the material obtained in the step (2) with an n-hexane solution of trimesoyl chloride at room temperature, and then removing the unreacted n-hexane solution; and (4) carrying out air drying and heat treatment on the material obtained in the step (3). Specific alkali metal or alkaline earth metal ions are introduced into a water phase and have a synergistic effect with the polyamine catalyst, so that the interfacial polymerization reaction rate is effectively regulated and controlled, a polyamide separation layer is thinner and more uniform in structure, the permeation flux of the membrane is remarkably improved, and meanwhile, the extremely high rejection rate of divalent salt is kept.

The invention provides a multilayer thermal insulation composite material containing a solid waste base and a preparation method thereof, and belongs to the technical field of thermal insulation composite materials. The multilayer thermal insulation composite material containing the solid waste base sequentially comprises a protective decoration layer, a solid waste base thermal insulation core layer and an interface enhancement layer from top to bottom, wherein the main component of the solid-waste-based heat preservation core layer is an industrial solid waste mixture, the solid waste proportion in the raw materials is high, high-added-value resource utilization of a large amount of industrial solid waste is achieved, and the cost of the raw materials is remarkably reduced. Multi-layer compounding is adopted, the performance is excellent, the thermal insulation core layer forms geopolymer gel with high strength and improved water resistance under alkaline excitation through the synergistic effect of various solid wastes, a uniform closed-cell structure is formed in the thermal insulation core layer through chemical foaming, and the thermal conductivity coefficient is low.

The application relates to the technical field of cement materials, and particularly discloses a high-carbonization-resistance type supersulfated cement material, a preparation method thereof and application. The material comprises the following components in parts by weight: 50-70 parts of slag powder, 10-20 parts of a sulfate activator, 15-25 parts of calcium sulphosilicate, 1-5 parts of lithium-based alkali silicate and 0.2-0.8 parts of benzyltrimethylammonium hydroxide. The preparation method comprises the following steps: (1) uniformly mixing the slag powder, the sulfate activator, the calcium sulphosilicate and the lithium-based alkali silicate to obtain a powder; (2) uniformly mixing the benzyltrimethylammonium hydroxide and water to obtain a benzyltrimethylammonium hydroxide solution; and (3) uniformly mixing the benzyltrimethylammonium hydroxide solution and the powder, thereby obtaining the product. The application utilizes the synergistic effect of the constructed quaternary ammonium alkali-lithium-based alkali silicate composite alkaline activation system and the calcium sulphosilicate, thereby improving the carbonization resistance of the supersulfated cement and the mechanical properties of the cement.

This invention discloses an electrolytic water anode mesh, its preparation method, and an electrolysis apparatus, relating to the field of hydrogen production through water electrolysis. A collision-embedding method is used to deposit electrolytic nickel powder onto the surface of a preheated nickel mesh. By controlling the deposition conditions, a large-area, stable catalytic working layer with a micro / nano structure can be prepared, enhancing the electrolytic catalytic performance of the electrolysis. Compared to plasma spraying for Raney nickel deposition, the method provided by this invention eliminates the need for subsequent alkaline activation, significantly improving preparation efficiency and reducing equipment, maintenance, and manufacturing costs. Furthermore, it avoids the environmental pollution caused by alkaline aluminum removal activators. Compared to plasma spraying for Raney nickel deposition, the micro / nano dual-scale structure working layer prepared by this invention offers controllable micron and nanoscale dimensions and a three-dimensional structure, further enhancing the electrode's electrolytic catalytic performance and demonstrating excellent application prospects.

This invention relates to the field of cement materials technology, specifically disclosing a high carbonation-resistant hypersulfate cement material and its preparation method and application. The material comprises the following components: 50-70 parts by weight of slag powder, 10-20 parts by weight of sulfate activator, 15-25 parts by weight of calcium sulfosilicate, 1-5 parts by weight of lithium-based alkaline silicate, and 0.2-0.8 parts by weight of benzyltrimethylammonium hydroxide. The preparation method comprises: (1) mixing the slag powder, sulfate activator, calcium sulfosilicate, and lithium-based alkaline silicate to obtain a powder. (2) mixing the benzyltrimethylammonium hydroxide with mixing water to obtain a benzyltrimethylammonium hydroxide solution. (3) mixing the benzyltrimethylammonium hydroxide solution with the powder to obtain the final product. This invention utilizes the constructed quaternary ammonium base-lithium-based alkaline silicate composite alkaline activation system in synergy with calcium sulfosilicate, which not only improves the carbonation resistance of hypersulfate cement but also improves the mechanical properties of the cement.

The application belongs to the technical field of multilayer co-extrusion PE film, and particularly provides a high-barrier multilayer co-extrusion PE film and a preparation method thereof.A high-barrier multilayer co-extrusion PE film comprises the following components in sequence: an mPE layer, a bonding layer, a modified EVOH barrier layer, a bonding layer and an mPE layer.The preparation method of the modified EVOH barrier layer is as follows: first, alkali-activate and oxidize EVOH to obtain oxidized EVOH; then, disperse the oxidized EVOH, amino-oxidized graphene and chitosan in solvents respectively and mix and react them.A preparation method of the high-barrier multilayer co-extrusion PE film comprises the following steps: first, prepare the bonding layer particles, then prepare the modified EVOH barrier layer particles, and finally, perform multilayer co-extrusion on the components according to a certain mass ratio.The high-barrier multilayer co-extrusion PE film prepared by the application has high barrier performance.

This invention relates to the field of solid waste resource utilization technology, specifically to a geopolymer material, its preparation method, and its application. The invention provides a geopolymer material composed of the following raw materials: feedwater sludge, blast furnace slag, desulfurized gypsum, and an alkaline activation solution; the desulfurized gypsum accounts for 8%-32% of the total mass of the feedwater sludge and blast furnace slag. The geopolymer material provided by this invention constructs a ternary functional material synthesis system of feedwater sludge-blast furnace slag-desulfurized gypsum. Through the synergistic preparation of multiple solid waste materials, a geopolymer material with both mechanical strength and high-efficiency phosphorus adsorption performance is produced, providing a solution with both theoretical basis and technical feasibility for the high-value utilization of industrial solid waste and the control of phosphorus pollution.