729 results about "Physisorption" patented technology

The invention discloses a high-temperature-resistant inorganic adhesive for sealing a hollow-core optical fiber as well as a preparation method and application of the high-temperature-resistant inorganic adhesive. The high-temperature-resistant inorganic adhesive is prepared from the following raw materials in parts by weight: 46-55 parts of modified silica sol, 26-33 parts of aluminum dihydrogen phosphate, 3.5-5.8 parts of a functional additive and 0.9-1.4 parts of a curing agent. Modified silica sol, aluminum dihydrogen phosphate, a functional additive and a curing agent are used as raw materials and embedded into a colloidal network through physical adsorption and chemical bonding, a hydrophobic interface is built, capillary permeation is effectively inhibited, and the influence of water vapor on the bonding effect in practical application is greatly reduced; the inorganic adhesive can bear the high temperature of 600 DEG C and above for a long time, shows excellent bonding and sealing effects on hollow-core optical fiber sealing from normal temperature to the temperature of 600 DEG C and above, is compact and fine in structure and good in water resistance after being cured, can effectively block air and moisture from permeating in the hollow-core optical fiber drawing process, is short in curing time consumption, and has the characteristics of safety and environmental protection.

The invention discloses a preparation method of a cell inflammatory factor adsorbent, which comprises the following steps: mixing styrene, divinyl benzene and hydroxyethyl acrylate, and adding a pore-foaming agent and mesoporous SiO2 nano powder to prepare a porous microsphere carrier; the preparation method comprises the following steps: mixing chitosan and poly (N-isopropylacrylamide) in an acetic acid solution to obtain a temperature-sensitive chitosan hydrogel precursor solution; the preparation method comprises the following steps: activating the surface of a porous microsphere carrier by using 1-ethyl-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide, mixing the activated porous microsphere carrier and a temperature-sensitive chitosan hydrogel precursor solution to obtain a water phase, and assembling, washing and drying in an oil phase to obtain the cell inflammatory factor adsorbent. Through the design of the core-shell structure and the addition of the mesoporous SiO2 nano powder, the temperature response characteristic and the recyclable characteristic are given to the cell inflammatory factor adsorbent, the adsorption capacity of cell factors is also improved, and a new solution is provided for physical adsorption of the cell inflammatory factors.

The invention provides a biochar composite porous material for heavy metal contaminated soil remediation and a preparation method and application of the biochar composite porous material. The preparation method comprises the steps that biomass raw materials are subjected to high-temperature pyrolysis carbonization and then smashed, ground and sieved, and biochar powder is obtained; dispersing in a phosphoric acid solution to obtain a biochar solution, and filtering, washing and drying after a hydrothermal activation reaction to obtain activated biochar; dispersing in a chitosan solution, carrying out ultrasonic oscillation, filtering, washing and drying to obtain modified charcoal; mixing sodium bentonite, attapulgite and deionized water, uniformly mixing the modified charcoal, the functional slurry and a sodium carboxymethyl cellulose solution to obtain composite slurry, performing compression molding to obtain a green body, and then drying and calcining the green body. The biochar composite porous material prepared by the invention can simultaneously play multiple roles of physical adsorption, chemical chelation, ion exchange and the like in a heavy metal contaminated soil treatment process, so that efficient fixation of various heavy metal ions is realized.

The invention provides phosphorus-doped hydrothermal synchronously-activated hierarchical pore green biochar, a preparation method thereof and application of the phosphorus-doped hydrothermal synchronously-activated hierarchical pore green biochar in formaldehyde adsorption, and belongs to the technical field of biomass resource high-value utilization and air pollution control. The preparation method comprises the following steps: mixing a biomass raw material with a phosphoric acid catalyst, carrying out hydrothermal carbonization reaction, carrying out solid-liquid separation on a reaction product after the reaction is finished, collecting a solid-phase material, drying, mixing with potassium hydroxide, activating, washing and drying the obtained product, and thus obtaining the phosphorus-doped hydrothermal synchronously-activated hierarchical porous green charcoal. Phosphoric acid is introduced in the hydrothermal stage to serve as a structure-directing agent and a doping source, uniform doping of phosphorus and coordinated regulation and control of a pore structure are achieved, a hierarchical pore channel system is formed in the subsequent activation process, and the physical adsorption and chemical fixation capacity of the biochar to formaldehyde molecules is greatly improved.

The invention discloses a hydroxyl-rich ruthenium / titanium dioxide catalyst as well as a preparation method and application thereof, and the preparation method comprises the following steps: step 1, loading a ruthenium precursor on a titanium dioxide carrier by adopting an impregnation method or a deposition-precipitation method, and drying and calcining to obtain a Ru / TiO2 catalyst; and step 2, placing the Ru / TiO2 catalyst in an atmosphere environment containing water vapor or forming a physical adsorption water film on the surface of the Ru / TiO2 catalyst, and performing ultraviolet irradiation treatment to obtain the Ru / TiO2 catalyst. According to the method, water is physically adsorbed through ultraviolet light dissociation, hydroxyl is directly generated on the surface of Ru / TiO2 in an in-situ mode, the method is easy to operate, complex liquid phase treatment is not needed, and the stability of the generated hydroxyl under the subsequent high-temperature gas-solid phase hydrogen-rich reaction condition is obviously superior to that of hydroxyl introduced through a traditional method. The stable hydroxyl enriched on the surface serves as an effective Lewis base site and cooperates with a Ru active site, adsorption and activation of CO2 molecules are remarkably promoted, and therefore the catalytic activity of the CO2 methanation reaction is greatly improved.

The invention relates to the field of immobilized enzymes, in particular to immobilized lipase with graft-modified amino resin as a carrier and a preparation method thereof.The method comprises the steps that firstly, the amino resin is modified through the oxidative auto-polymerization characteristic of tannic acid, and first modified amino resin is obtained; and modifying the first modified amino resin by using fatty amine as a hydrophobic modifier to obtain second modified amino resin. Then lipase is fixed on the second modified amino resin through physical adsorption, the lipase is subjected to interfacial activation on an amphiphilic interface on the second modified amino resin, and a part of lipase is covalently bound with quinonyl in an activated state, so that the immobilized lipase with high activity and stability is obtained. The method is easy to operate, green and non-toxic, the prepared immobilized lipase is good in enzyme activity and stability, and the method can be used for preparing the immobilized lipase on a large scale, can be applied to the field of food and has industrial application potential.

The present application relates to wastewater treatment technical field, specifically to a kind of ammonia nitrogen wastewater treatment method, the composite modified zeolite material in the present application has excellent physical adsorption capacity to ammonia nitrogen by virtue of its unique pore structure and surface properties, ammonia nitrogen molecules in wastewater can be quickly captured, then through the synergistic effect of composite photocatalyst under light and ultrasonic, strong oxidizing free radicals are generated, ammonia nitrogen molecules not completely adsorbed by zeolite material are deeply degraded, through the synergistic effect of adsorption and photocatalysis, the removal efficiency of ammonia nitrogen is significantly improved;After adsorption and photocatalytic treatment, the ammonia nitrogen concentration in wastewater has been greatly reduced, and resin adsorption treatment is used as a subsequent step, which can selectively adsorb residual trace amounts of ammonia nitrogen and other impurities, thereby realizing deep purification of wastewater and ensuring that the effluent quality meets or exceeds relevant discharge standards.

The invention provides a microbial slow-release porous composite material for sewage treatment as well as a preparation method and application thereof. The preparation method comprises the following steps: dropwise adding an organic ligand solution into a precursor solution consisting of a nanocellulose solution and a cobalt source solution; mixing the reaction solution with polyvinyl alcohol, injecting the mixture into a mold, and performing directional freezing to obtain an aerogel matrix; carrying out hydrophobic modification on the aerogel matrix to obtain a modified aerogel matrix; mixing the microbial suspension with sodium alginate, and homogenizing at high pressure to obtain a gel precursor emulsion; the preparation method comprises the following steps: dropwise adding a calcium chloride solution to gelatinize to obtain gel particles, and then cross-linking and drying by glutaraldehyde to obtain sustained-release capsule particles; dispersing the sustained-release capsule particles in deionized water to obtain dispersion liquid; and dipping the modified aerogel matrix in the dispersion liquid. An aerogel matrix with a hierarchical porous structure is compounded with a sustained-release capsule with a pH response mechanism, so that physical adsorption, chemical catalysis and biodegradation for sewage treatment are realized.

The invention relates to the technical field of wastewater treatment, in particular to an ammonia-nitrogen wastewater treatment method.A composite modified zeolite material has excellent physical adsorption capacity on ammonia nitrogen by means of the unique pore structure and surface property of the composite modified zeolite material, ammonia nitrogen molecules in wastewater can be rapidly captured, and the ammonia nitrogen wastewater treatment effect is improved. Then, under the synergistic effect of illumination and ultrasonic waves, free radicals with strong oxidizing property are generated through the composite photocatalyst, ammonia nitrogen molecules which are not completely adsorbed by the zeolite material are deeply degraded, and the removal efficiency of ammonia nitrogen is remarkably improved through the synergistic effect of adsorption and photocatalysis; after adsorption and photocatalysis treatment, the concentration of ammonia nitrogen in the wastewater is greatly reduced, then resin adsorption treatment is adopted as a subsequent step, and residual trace ammonia nitrogen and other impurities can be selectively adsorbed, so that deep purification of the wastewater is realized, and the effluent quality is ensured to reach or be superior to related emission standards.

The invention relates to the technical field of phase change energy storage and heat management, and provides a heat insulation-heat conduction integrated phase change composite material and a preparation method thereof. The preparation method comprises the following steps: S1, preparing heat-conducting layer precursor mixed slurry; s2, preparing a heat insulation layer precursor mixed solution; s3, respectively pouring the two solutions into customized molds, directionally freezing and freeze-drying; s4, carrying out thermal imidization; and S5, partially impregnating the phase-change material, and packaging the phase-change material in a skeleton of the heat-conducting layer aerogel by adopting a physical adsorption method. The calcium ion regulator is introduced into the heat insulation layer precursor solution, so that the pore diameter structure of the polyimide aerogel can be regulated and controlled, and the calcium ion regulator can be used as a bridge to connect the heat insulation layer and the heat conduction layer, so that the integrated design of the material is realized.

The invention discloses an efficient and lasting multifunctional refrigerator deodorant which comprises the following components: (a) 50-85wt% of a porous adsorption material with a high specific surface area; (b) 5-30 wt% of a catalyst capable of effectively catalyzing and decomposing organic odor molecules in a low-temperature environment of 0-10 DEG C; and (c) 3 to 15 weight percent of long-acting slow-release type broad-spectrum antibacterial agent. According to the efficient and lasting refrigerator deodorant and the preparation method thereof, the dual effects of physical adsorption and low-temperature catalytic decomposition are utilized, multiple types of peculiar smell molecules can be rapidly adsorbed and thoroughly decomposed, and the deodorization efficiency is remarkably higher than that of a single adsorbent; the service life is greatly prolonged and is 3-5 times that of common activated carbon, the food decay speed is reduced, the food fresh-keeping period is indirectly prolonged, and food safety is guaranteed. The use process is safe and reliable, the use is convenient, external conditions such as illumination and heating are not needed, the device can be directly placed in a refrigerator, the replacement frequency is reduced due to long-term effect, and the comprehensive use cost is low.

The invention relates to a low-dielectric-loss high-thermal-conductivity epoxy resin composite material and a preparation method thereof, and the preparation method comprises the following steps: carrying out surface modification treatment on a thermal conductive filler: carrying out surface modification on the thermal conductive filler by adopting a chemical covalent bonding or physical adsorption mode, the heat-conducting filler is used for improving the compatibility of the filler and an epoxy resin matrix and reducing the interface thermal resistance, and comprises boron nitride with a two-dimensional sheet structure; epoxy resin, a curing agent and an optional modifier are evenly mixed, the epoxy resin is selected from epoxy resin with the low polarity characteristic, and the modifier comprises at least one of thermoplastic resin or elastomer. And the process is simple and controllable.

The invention discloses a composite activated carbon filter material and a preparation process thereof, and belongs to the technical field of water treatment materials. The filter material sequentially comprises a modified coconut shell activated carbon matrix, a bimetallic oxide and a biodegradable functional film from inside to outside, the modified coconut shell activated carbon matrix is prepared by a three-step process of acid leaching modification, microwave activation and nitrogen doping; the bimetallic oxide is Fe-Mn oxide nano particles; the biodegradable functional film is composed of a polyvinyl alcohol / polylactic acid blended film and a complex microbial inoculant, and the complex microbial inoculant comprises a mixed flora of pseudomonas, bacillus and nitrifying bacteria. Through the three-layer composite structure of the coconut shell activated carbon matrix, the bimetallic catalyst layer and the biodegradable film, the synergistic effect of physical adsorption, chemical catalysis and biodegradation is achieved. Through step-by-step superposition of the functional layers, the removal efficiency of complex pollutants such as organic matters, heavy metals, ammonia nitrogen and the like is remarkably improved.

The invention relates to the technical field of conditioners, in particular to a conditioner for improving crop stress resistance and a preparation method thereof, and the conditioner comprises the following raw materials: plant hormones, trehalose, humic acid, a complex microbial inoculant, modified nano sodium alginate, modified nano zinc oxide, lactic acid, a green tea extract and a licorice extract. The modified nano-sodium alginate, the modified nano-zinc oxide and the lactic acid play a role through a synergistic effect, the modified nano-sodium alginate and nutrient substances form a modified nano-sodium alginate gel compound through physical adsorption and chemical effects, stress-resistant peptides on the surface of the compound directly activate immune systems of crops, synthesis of stress-resistant proteins is promoted, and the stress resistance of the crops is improved. The modified nano-zinc oxide enhances the absorption of nutrient substances by crop root cells, assists the activation of crop immune systems, and synergistically enhances the disease resistance and stress resistance of crops, and the lactic acid effectively stabilizes the pH value of the conditioner, relieves the oxidation pressure of crops under adverse conditions, and enhances the physiological stability of crops.

The invention provides an elastic microcarrier as well as a preparation method and application thereof, and belongs to the field of water, wastewater and sewage treatment, the elastic microcarrier comprises the following components in parts by mass: 50-75 parts of thermoplastic elastomer, 25-10 parts of diatomite, 10-5 parts of tourmaline and 15-10 parts of iron-carbon powder. The material has good elasticity, adsorbability, biocompatibility and electrochemical characteristics, and can form a microscopic primary battery effect. The elastic microcarrier is applied to sewage treatment with a membrane bioreactor, pollutants can be removed through physical adsorption, chemical action and biological enhancement, meanwhile, the surface of a membrane is kept clean in combination with flexible scraping, membrane pollution is remarkably slowed down, the running membrane flux is improved, and the service life of the membrane is prolonged. The mechanical damage of the traditional rigid filler to the membrane is avoided, and the service life of the membrane is prolonged. The preparation method of the elastic microcarrier is simple and easy to operate, the elastic microcarriers with uniform specifications can be prepared in batches, and the applicability is high.

The invention discloses a compound environment-friendly corrosion inhibitor as well as a preparation method and application thereof. The choline ionic liquid comprises choline ionic liquid and amino acid, the choline ionic liquid is choline cations; the amino acid is one or more of cysteine and tryptophan. The compound environment-friendly corrosion inhibitor has high corrosion inhibition efficiency, and the compound structure of the compound environment-friendly corrosion inhibitor further improves the protection performance of the compound environment-friendly corrosion inhibitor through a dual adsorption mechanism of the synergistic effect of physical adsorption and chemical adsorption on the metal surface. According to the compound environment-friendly corrosion inhibitor, a full-green ionic liquid corrosion inhibition system is constructed, the environment-friendly requirement is met, and a metal protection solution can be provided for industrial acid pickling and other strong acid working conditions. Not only is the progress of a corrosion inhibition technology promoted, but also more economic and environment-friendly anti-corrosion application can be provided for actual industrial scenes.

The invention belongs to the technical field of oil and gas exploitation, and relates to a nanometer desorbing agent for a gas well and a preparation method thereof.The desorbing agent is prepared by using biochar subjected to special pretreatment as a core carrier, loading bimetallic oxide nanoparticles in a specific proportion and carrying out surface modification with an environment-friendly surface active agent. Through the synergistic effect of the nanometer size effect, the catalysis / electron transfer effect of the metal oxide, the physical adsorption and pore transport effect of the biochar and the interfacial tension reduction effect of the surfactant, the adsorption energy barrier of gas molecules such as methane on the rock surface is remarkably reduced, and efficient desorption of the gas molecules is promoted. Meanwhile, all the components and the preparation process are environment-friendly and harmless to a human body.

The invention discloses a microbial decomposing inoculant for straws and a preparation method thereof, and belongs to the technical field of microorganisms. The microbial decomposing inoculant for straw is prepared from the following raw materials in parts by weight: 15-18 parts of functional microbial liquid, 3-5 parts of neutral protease, 1-3 parts of laccase, 20-25 parts of a nano-porous diatomite carrier, 5-7 parts of a humectant, 2-3 parts of humic acid chelated trace elements and 2-4 parts of an inducer. The preparation method comprises the following steps: screening talaromyces thermophilus, Guangxi thermoactinomycetes and arthrobacter habitualis to form a functional microbial liquid, adding a laccase-protease compounding system to cooperate with the physical adsorption effect of diatomite, and adding humic acid chelated trace elements to form an ion exchange network with polyglutamic acid; straw components are efficiently degraded through a triple mechanism of'enzymatic degradation-element supplementation-microenvironment regulation and control ', the decomposition process is accelerated, and the straw compost quality is improved.

The invention discloses a high-temperature-resistant benzimidazolone polyamide imide battery binder as well as a preparation method and application thereof, and belongs to the technical field of battery materials. The high-temperature-resistant benzimidazolone polyamideimide battery binder with uniformly distributed amide segments and imide segments is prepared through a method for activating aromatic diamine on one side of trimethylchlorosilane and changing the activity of amino groups on the two sides, the comprehensive performance of the high-temperature-resistant benzimidazolone polyamideimide battery binder is excellent, the defects that a traditional binder is poor in heat resistance and insufficient in chemical stability are overcome, and the service life of the high-temperature-resistant benzimidazolone polyamideimide battery binder is prolonged. The introduction of high-polarity groups can improve the wettability and ion transmission capability of the electrolyte, improve the solubility of the electrolyte so as to facilitate electrode forming, and can also form strong chemical bonds or physical adsorption with positive and negative inorganic active materials during application, thereby reducing the structural damage in the cycle process and improving the electrochemical performance of the battery. The lithium ion battery electrode can keep a stable structure in a high-temperature environment, the thermal runaway risk caused by high temperature is remarkably reduced, and the application requirements of the lithium ion battery in a fast charging or high-temperature energy storage scene are well met.

The invention relates to the technical field of biomedical materials, and discloses an antibacterial hemostatic material and a preparation method thereof, the antibacterial hemostatic material comprises the following components by weight: 2-3 parts of amino acid terminated polyurethane, 1-3 parts of thiolated chitosan, 3-5 parts of sodium alginate, and 2-4 parts of a polyvinyl alcohol solution. Through the synergistic effect of amino acid terminated polyurethane-sulfhydrylated chitosan-sodium alginate, a dual hemostatic mechanism of physical adsorption-chemical coagulation promotion is constructed: sodium alginate as a natural polysaccharide has strong hydrophilicity and cation adsorption capacity, can quickly absorb moisture in wound blood, concentrate platelets and coagulation factors, and has a good hemostatic effect; thrombin activation is accelerated, and the blood coagulation time is shortened; the antibacterial hemostatic material disclosed by the invention has relatively good antibacterial and hemostatic effects.

The invention discloses a gas concentration-oxidation-heat regeneration system and method, and relates to the technical field of coal mine energy conservation and emission reduction, the gas concentration-oxidation-heat regeneration system comprises a chemical adsorption device which is communicated with low-concentration gas and is used for adsorbing and dedusting the low-concentration gas, and a physical adsorption device which is communicated with the chemical adsorption device and is used for adsorbing and dehumidifying the low-concentration gas, the chemical adsorption device and the physical adsorption device are communicated with the oxidation device through the chemical desorption device and the physical desorption device respectively, the oxidation device is communicated with the waste heat utilization device, and low-concentration gas is subjected to dust removal treatment while methane adsorption is completed through the chemical adsorption device; the physical adsorption device is used for completing methane adsorption and dehumidifying low-concentration gas at the same time, and desorbing is completed and concentrated methane after desorption is subjected to oxidation and waste heat utilization at the same time, so that dust removal, dehumidification, concentration, oxidation and waste heat utilization of the device form a whole, the structure of the device is simplified, and the low-concentration gas is fully utilized.

The invention discloses application of a carbon steel corrosion inhibitor based on combination of physical adsorption, chemical adsorption and hydrophobic barrier, and relates to the technical field of metal corrosion inhibition. The technical problem that a corrosion inhibitor in the prior art is low in corrosion inhibition efficiency in a high-temperature strong-acid environment is solved. The preparation method of the carbon steel corrosion inhibitor comprises the following steps: firstly, ultrasonically dissolving 4-aminopyridine to obtain a solution I; then, dropwise adding an isopropanol solution of 2, 3-epoxypropyltrimethylammonium chloride into the solution I according to a molar ratio of 1: 1, removing a solvent through a rotary evaporation method, washing with ethanol, centrifuging to obtain quaternized 4-aminopyridine, and drying the quaternized 4-aminopyridine; and finally, the dried quaternized 4-aminopyridine and bromododecane are added into acetonitrile for a reaction, diethyl ether is dropwise added into obtained reaction liquid for precipitation, and the quaternized 4-aminopyridine-bromododecane carbon steel corrosion inhibitor is obtained after drying. The prepared carbon steel corrosion inhibitor is high in corrosion inhibition efficiency in a high-temperature and strong-acid environment.

The invention relates to the technical field of water treatment, in particular to a method for treating degradation-resistant organic pollution underground water based on a micro-interface strengthening technology. According to the technical scheme, the method comprises the steps that an underground water sample is collected and subjected to pollution characteristic analysis, composite material slurry is injected into a water-containing layer to construct an interface-enhanced in-situ reaction system, and the slurry is composed of nanoscale iron-based metal particles, graphene oxide derivatives, modified biochar, a surfactant and the like; meanwhile, a low-pressure gas injection system is arranged to form a micro-aerobic environment so as to improve the interface reaction efficiency, dominant microbial communities are synchronously injected, a slow-release carbon source carrier is added so as to strengthen the biological synergistic degradation effect, and the operation state of the system is regulated and controlled through multi-parameter monitoring. According to the method, a micro-interface synergistic system integrating physical adsorption, chemical reduction and biological metabolism is constructed, refractory organic pollutants such as aryl halide and polycyclic aromatic hydrocarbon in underground water can be efficiently and stably removed, and the method has the advantages of being high in remediation efficiency, high in operation stability and wide in environmental adaptability.

The invention discloses an injectable multifunctional intelligent response type strontium-containing hydrogel microsphere as well as a preparation method and application thereof, the strontium-containing hydrogel microsphere comprises a hydrogel microsphere carrier and a loaded medicine, and the hydrogel microsphere is obtained from lycium barbarum polysaccharide and a temperature-sensitive polymer through a microfluidic technology; the loaded medicine is strontium ions and a near-infrared light conversion material, the strontium ions are combined with the lycium barbarum polysaccharide in the microspheres through ion coordination, and the near-infrared light conversion material is combined with the microspheres through physical adsorption. The lycium barbarum polysaccharide and the temperature-sensitive polymer are combined, the bone regeneration promoting capacity is improved through the synergistic effect of the lycium barbarum polysaccharide and the temperature-sensitive polymer, the hydrogel microspheres have intelligent adjustability further through the near-infrared response performance, the strategic purpose of individualized drug delivery in time and space is achieved, and the application prospect is wide. The limitation that a hydrogel carrier cannot be administrated according to needs is avoided, and the hydrogel carrier is small in particle size, injectable and convenient in administration.

The invention discloses a carbon dioxide adsorbent based on a silver metal organic framework and a production method thereof.The carbon dioxide adsorbent is obtained by compounding aminoethanesulfonic acid and the silver metal organic framework according to the mass ratio of 1: 1, and the production method comprises the steps that S1, a bimetal framework is synthesized; s2, preparing a silver metal organic framework; s3, amino ethanesulfonic acid modification; by compounding the aminoethanesulfonic acid and the silver metal organic framework, the distribution of metal silver in the organic framework can be optimized, and CO2 chemical adsorption is enhanced through double metal nodes and easy acidic sites; metal silver forms a silver metal framework through coordination, aminoethanesulfonic acid modifies the surface of a pore channel through a sulfonic acid group, physical adsorption and chemical adsorption on CO2 are enhanced, the obtained carbon dioxide adsorbent can be combined with the surface plasma resonance effect, light energy can be efficiently converted into heat energy under visible light, and therefore desorption energy consumption is reduced.

The ardealite-based recycled aggregate is prepared from the following components in parts by weight: 360 to 480 parts of ardealite, 500 to 600 parts of mineral powder, 30 to 60 parts of steel slag, 50 to 90 parts of cement, 35 to 70 parts of zeolite, 5 to 20 parts of natural vegetable wax powder, 2 to 10 parts of octyltriethoxysilane and 300 to 350 parts of water. The preparation method comprises the following steps: crushing the phosphogypsum, and uniformly mixing and stirring with the mineral powder, the steel slag, the zeolite and the cement to obtain a mixture A; uniformly mixing and stirring the water, the natural vegetable wax powder and the octyltriethoxysilane to obtain a mixture B; uniformly stirring the mixture A and the mixture B, injecting into a mold, vibrating and compacting, standing at 20-25 DEG C for 24 hours, demolding, and laminating and curing for more than 7 days; crushing into particles of 5-20 mm, and naturally curing for 28 days or more to obtain the phosphogypsum-based recycled aggregate. The consumption of the phosphogypsum is improved, the cement consumption is reduced, harmful substances are fixed through double mechanisms of physical adsorption and ion exchange, and meanwhile, a stable hydrophobic layer is formed in the concrete aggregate to reduce the water absorption rate.

The invention discloses a preparation method and application of doped hierarchical porous manganese dioxide, and belongs to the field of catalyst preparation and air purification. According to the invention, potassium permanganate is used as a manganese source and an oxidizing agent, a modified reducing agent is added, mixing and stirring reaction are carried out at room temperature, and the doped hierarchical porous manganese dioxide catalyst is synthesized after washing, drying and high-temperature treatment. The preparation method is simple in preparation process and high in repeatability; the prepared manganese dioxide realizes doping of potassium ions and formation of oxygen vacancies, and the catalytic activity of the manganese dioxide is improved; the doped manganese dioxide catalyst has a multi-stage structure of micropores, mesopores and macropores, the multi-stage pore structure endows the doped manganese dioxide catalyst with a relatively large specific surface area, the physical adsorption capacity of the doped manganese dioxide catalyst can be improved, and meanwhile, more active sites are exposed, so that the doped manganese dioxide catalyst shows relatively high activity and stability in a reaction for catalytically oxidizing gaseous pollutant formaldehyde at room temperature.

The invention belongs to the field of biological refining of grease, and particularly relates to a grease degumming method based on a phospholipase micromotor reactor. The invention discloses an enzymatic degumming method of edible vegetable oil, algal oil and animal fat, which aims at the pain points of low degumming efficiency, long time consumption, easy enzyme inactivation and difficult recovery of the traditional enzymatic degumming, designs core-shell mesoporous silica microspheres, adopts an emulsion method to respectively graft alkyl and alkylamine on two sides of the microspheres, constructs a Janus carrier with asymmetric chemical environment, and improves the degumming efficiency of the edible vegetable oil, the algal oil and the animal fat. And immobilizing phospholipase A1, A2, B or C through physical adsorption to prepare the phospholipase micromotor reactor. In the degumming process, a micromotor cooperates with an interface activation-enhanced mass transfer-dynamic self-cleaning mechanism, self-driven movement in an interface micro-scale range is realized by virtue of a substrate concentration gradient, the enzyme activity and stability of phospholipase are remarkably improved, and efficient degumming of grease is realized. The method is high in oil yield, green in process and suitable for industrial popularization.

The invention designs a preparation method of an electrochemical sensor for detecting acrylamide based on a Ce-MOF and AuPd nanoflower composite material. The advantages of large surface area and good stability of Ce-MOF are utilized to load a large amount of AuPd NFs, and the composite material Ce-MOF (at) AuPd NFs with high conductivity is obtained. The preparation method comprises the following steps: modifying an electrode by virtue of a physical adsorption effect, fixing a triple-helix molecular switch THMS on the electrode by virtue of a gold-sulfur bond and a palladium-sulfur bond, when acrylamide exists, combining acrylamide with an aptamer, forming DNAzyme by virtue of single-stranded CDNA1 and single-stranded CDNA2, and driving a DNA walker amplification strategy in the presence of Mg < 2 + >, so that a hairpin HP1 is sheared, and a large amount of single-stranded S1 is obtained. According to the method, S1, signal tags combined on an electrode are reduced and signals are reduced by destroying a triple helix structure, so that acrylamide detection is realized. The electrochemical biosensor constructed by the method disclosed by the invention has relatively high specificity and relatively high sensitivity.

The invention discloses preparation and application of a gold electrode and an electrochemical detection device. The preparation method of the modified gold electrode comprises the following steps: activating a polished and ground bare gold electrode with nitric acid, and immersing the polished and ground bare gold electrode into a deoxidized cysteamine (Cyst) solution for 2 hours; washing with double distilled water and soaking for about 12 hours, and removing physically adsorbed Cyst to obtain a Cyst modified gold electrode; immersing the Cyst modified gold electrode into a nanogold solution for 18 hours, taking out and airing to obtain a colloidal gold-Cyst modified gold electrode; and finally, immersing the colloidal gold-Cyst modified gold electrode into Cyst for 2 hours, taking out and airing to obtain the target modified gold electrode. The modified gold electrode prepared by the method, a platinum wire electrode and a silver-silver chloride electrode form a three-electrode system. The modified gold electrode in the three-electrode system has a good electrochemical catalytic oxidation function on the uric acid, the peak current and the content of the uric acid are in a linear relation, and the system can be directly used for detecting the uric acid in the urine.