380 results about "Citrate sodium" patented technology

The invention relates to the field of inorganic material preparation, and particularly discloses pseudo-boehmite and a preparation method thereof. A preparation method of pseudo-boehmite comprises the following steps: (1) mixing an aluminum salt solution and an aluminate solution, adding a crystal form regulating agent, and stirring for reaction to obtain a sol system; the crystal form regulating agent is ZnS quantum dots modified by thiohydracrylic acid; (2) adding a pore diameter guiding agent into the sol system, and aging for 6-8 hours; the pore diameter guiding agent is a compound of a polyethylene glycol-polypropylene glycol-polyethylene glycol triblock copolymer and sodium citrate; and (3) carrying out solid-liquid separation on the aged sol system, and washing and drying the obtained solid to obtain the pseudo-boehmite. The proportion of 5-10nm pores of the pseudo-boehmite prepared by the preparation method disclosed by the invention reaches 90% or above, so that the pore distribution requirement of a fine catalytic reaction on the pseudo-boehmite can be met, and the efficient catalytic reaction is favorably realized.

The invention relates to a preparation method of a biomass-based degradable dust suppressant and a spraying device. The biomass-based degradable dust suppressant is prepared from the following components in percentage by weight: 0.78% of a biological matrix, 20.7% of a salting-out salt solution and the balance of an acetic acid solution diluted by deionized water, the method comprises the following specific steps: adding biological matrix powder into an acetic acid solution; the salting-out salt solution powder is poured into a biological matrix acetic acid solution, magnetic stirring is conducted for 30 min under the conditions that the rotating speed is 200 r / min and the temperature is 30 DEG C, and then ultrasonic treatment is conducted for 10 min for full reaction; a salting-out method and a dust suppression technology are combined, high-concentration salt solutions such as sodium citrate and sodium sulfate are selected, physical and chemical effects between salt ions and biomass material molecules are utilized, and the limitation of a traditional cross-linking mode is broken through the synergistic effect of salting-out auxiliary precipitation and weak ion cross-linking net forming; according to the present invention, the long-acting and safe dust suppression agent can be simply and conveniently prepared, the dust suppression efficiency can be effectively improved, and the dust suppression cost can be effectively reduced.

The invention relates to the technical field of high polymer materials, in particular to a color-spun superfine sea-island imitation sheepskin fabric and a production method thereof. The color-spun superfine sea-island imitation sheepskin fabric comprises the following raw materials in parts by weight: color-spun superfine sea-island fibers, conventional polyester filaments and a functional additive, the color spinning superfine sea-island fiber is formed by blending alkali-resistant color master batches and a sea-island base material, the mass ratio of an island component to a sea component in the sea-island base material is (5-7): (3-5), and raw materials of the island component and the sea component are polyethylene terephthalate and polyethylene respectively; the functional additive comprises an alkali-resistant stabilizer, a dyeing auxiliary agent and a softening agent. According to the invention, sodium citrate and KH-550 in the alkali-resistant stabilizer react at a constant temperature, sodium citrate is dissolved in the process and forms weak interaction with amino of KH-550 to enhance the stability of the system, and ether bonds of polyoxyethylene fatty acid and sulfonic groups of lauryl sodium sulfate in the dyeing auxiliary agent form a synergistic effect to enhance the emulsifying and wrapping capacity to grease and color paste.

The invention discloses a magnetic biochar coupled dynamic membrane synergistic pollution reduction and flora regulation method, which comprises the following steps: adding magnetic biochar into an anaerobic dynamic membrane bioreactor for anaerobic digestion reaction, and adding 1.2-1.5 g of magnetic biochar into each liter of sludge mixed liquid in the anaerobic dynamic membrane bioreactor. The magnetic biochar is composed of a honeycomb-shaped carbon material obtained by pyrolyzing carbon through sodium citrate and Fe3O4 loaded on the surface of the honeycomb-shaped carbon material through a chemical coprecipitation method. According to the method, functional microorganisms such as methane filamentous bacteria and methane rod bacteria can be selectively enriched, the methane yield is increased by 30%-35%, membrane pollution is effectively relieved by improving the sludge floc structure, the service life of the membrane is prolonged, and technical support is provided for low-cost and low-energy-consumption operation of the anaerobic membrane bioreactor.

The invention discloses a preparation method of modified mineral powder for adjusting and controlling the viscosity of concrete. The preparation method of the modified mineral powder comprises the following steps: placing vertical mill mineral powder in a hydrochloric acid solution for ultrasonic treatment and infiltration to obtain activated mineral powder; preparing a sodium alginate solution and a calcium chloride cross-linking solution, adding the activated mineral powder into the sodium alginate solution to obtain a mineral powder suspension, and dropwise adding the mineral powder suspension into the calcium chloride cross-linking solution to react to obtain calcium alginate coated mineral powder; the preparation method comprises the following steps: dissolving sodium citrate, glucolactone and active nano silicon dioxide in water to form precursor sol; and adding the calcium alginate coated mineral powder into the precursor sol to obtain the modified mineral powder. The modified mineral powder prepared by the method disclosed by the invention realizes double effects of morphology regularization and viscosity controllability, and has an adjusting and optimizing effect on the viscosity problem of concrete when being applied to the concrete; and the method improves the activity of the mineral powder and the bonding strength of interfaces of the mineral powder and other components at the same time, so that the compactness and the overall strength of the concrete are improved.

The invention discloses a hydrophobic anti-icing material based on silver ions and application in a power transmission line, and belongs to the technical field of hydrophobic anti-icing materials, the hydrophobic anti-icing material is prepared from the following raw materials in parts by weight: 80-120 parts of hydroxyl-terminated polydimethylsiloxane, 5-15 parts of tetraethoxysilane, 0.5-3 parts of silver nitrate, 3-10 parts of hydrophobic nano silicon dioxide and 1-5 parts of nano titanium dioxide. The invention discloses an anti-icing and deicing composite material, which is prepared from the following components in parts by weight: 80 to 120 parts of butyl acetate, 0.1 to 0.5 part of dibutyltin dilaurate, 0.5 to 2 parts of sodium citrate and 2 to 5 parts of modified fluorinated phosphotungstic acid imidazole compound, and solves the problems that the existing material is insufficient in photo-thermal utilization rate, poor in stability in a severe environment, insufficient in hydrophobic capacity and difficult to give consideration to anti-icing and deicing effects. According to the scheme, the modified fluorinated phosphotungstic acid imidazole compound and silver ions are introduced to form a synergistic effect, formation of an ice layer is inhibited, melting of the ice layer is promoted, meanwhile, lasting super-hydrophobicity is provided, a durable hydrophobic anti-icing coating based on the silver ions is formed, and the safety of a power grid is guaranteed.

The invention discloses an environment-friendly concrete water reducing agent and a preparation method thereof. The water reducing agent is prepared from the following raw materials in parts by weight: 25 to 60 parts of polycarboxylic acid water reducing agent mother liquor, 1.5 to 3 parts of modified early strength agent, 0.1 to 0.6 part of defoaming agent, 6 to 15 parts of water-retaining agent, 1.5 to 3.5 parts of dispersing agent, 0.4 to 1.2 parts of air entraining agent and 3 to 6 parts of retarder. The preparation method comprises the following steps: dissolving lignosulfonate in water, adjusting the pH value to 9-11, adding hydrogen peroxide, carrying out a reaction at 60-65 DEG C for 2-4 h, and carrying out drying so as to obtain modified lignosulfonate; the modified early strength agent is prepared from sodium citrate, nano silicon dioxide and a silane coupling agent according to the weight ratio of (3 to 5): 1: (0.08 to 0.12). The water reducer provided by the invention has the advantages of efficient water reduction, stable delayed coagulation, early strength and coagulation promotion and environmental friendliness.

The invention relates to the technical field of preparation of electro-catalysis electrode materials, in particular to a preparation method and application of a SeO2 doped RuO2 electrolyzed water catalyst.The preparation method comprises the steps that S1, ruthenium acetate and selenium dioxide are dissolved in deionized water together and continuously stirred to obtain a mixed solution A, then sodium citrate is dissolved in deionized water, and the PH value is adjusted to be 9 with ammonia water to obtain a solution B; s2, mixing the solution A and the solution B, reacting at 80 DEG C for 12 hours, naturally cooling, ultrasonically washing with deionized water and ethanol in sequence, centrifuging, and drying in a drying oven to obtain a catalyst precursor; and S3, carrying out two-step pyrolysis on the precursor, namely heating to 250 DEG C, annealing for 4 hours, heating to 400 DEG C, annealing and heating for 2 hours, so as to obtain the SeO2-doped RuO2 nanosheet. By introducing a proper amount of SeO2 for doping, the electronic structure of RuO2 is optimized, the adsorption and desorption balance effect of the catalyst on a reaction intermediate is adjusted, the Ru site catalytic performance is improved, and the obtained SeO2-doped RuO2 nanosheet has efficient acidic OER catalytic performance.

The invention provides a preparation method of a nano-gold star material, which comprises the following steps: stirring and heating a chloroauric acid solution, adding a sodium citrate solution, continuously stirring and heating, when the color of the solution is changed from colorless to dark red, adjusting the rotating speed to 600rpm, turning off a heating device, cooling at room temperature, filtering the reacted solution by using a water-based filter membrane, and drying to obtain the nano-gold star material. Removing impurities to obtain a gold seed solution; characterizing the gold seed solution and the gold seed particles; the preparation method comprises the following steps: adding a 4-hydroxyethyl piperazine ethanesulfonic acid solution, a gold seed solution, a hydroxylamine solution and a magnetic rotor into deionized water, dropwise adding a 22.5 mM chloroauric acid solution, adjusting the rotating speed to 700rpm, and reacting for 15 minutes at room temperature to obtain the nano gold star material. The prepared nano gold star material is uniform, stable, adjustable in particle size and high in dispersity, the material is in a three-dimensional multi-branch shape, and the diameter of the material is adjustable within 50-200 nm.

The invention provides silver powder and a preparation method thereof, and belongs to the technical field of metal powder preparation. According to the method, the silver powder microstructure control agent and the small-particle silver powder oriented growth inducer are used in a combined mode, the pH value, the temperature and the adding mode of the reaction solution are cooperatively controlled, and the large-flake silver powder with the small-particle thick-flake silver powder growing in an oriented arrangement mode is obtained. An oxidizing agent solution and a reducing agent solution are added into a base solution at the same time, sodium citrate in the base solution controls generation of small-particle thick-sheet-shaped silver powder, an alkaline inducer can promote oriented growth of silver powder particles while adjusting the pH of the solution, then target silver powder is prepared, and on the other hand, in an alkaline reaction system, the prepared silver powder is high in sedimentation rate and high in stability. The solid-liquid separation effect is good, and the waste liquid treatment cost is low. Compared with dendritic or traditional single flaky silver powder, the flaky silver powder prepared through the method has the advantages that the sintering shrinkage rate of powder slurry is low, the contact effect between silver powder particles is better, the sintering activity and conductivity are good, and the market application prospect is good.

The invention belongs to the technical field of laundry detergents, and particularly relates to an HPV sterilization underwear laundry detergent containing lysozyme-antibacterial protease and a preparation process. The HPV sterilization underwear laundry detergent containing lysozyme-antibacterial protease comprises the following components in percentage by mass: 12%-18% of modified alkyl glycoside, 4%-6% of an auxiliary surfactant, 1.5%-3% of a lysozyme-antibacterial protease compound, 0.8%-1.5% of double-chain quaternary ammonium salt, 2%-3% of sodium citrate, 1%-2% of glycerol, 1%-1.5% of citric acid, 0.1%-0.2% of a preservative, 0.1%-0.3% of essence and the balance of deionized water. The laundry detergent disclosed by the invention is mild in effect, short in decontamination time and good in decontamination effect, especially has an excellent decontamination effect on protein and sebum, and is especially suitable for decontaminating underwear.

The invention provides a hinokitiol-dihydromyricetin composite nano condensation body and a preparation method and application thereof, and the composite nano condensation body comprises the following components in 100 mL of a suspension: 0.3 to 0.5 g of hinokitiol, 0.5 to 0.8 g of dihydromyricetin, 1.0 to 1.5 g of chitosan, 0.5 to 0.8 g of sodium alginate, 2.0 to 3.0 mL of polyethylene glycol, 0.3 to 0.5 mL of Tween, 1.0 to 1.5 mL of glycerol, and the balance of a citric acid-sodium citrate buffer solution. The invention provides a hinokitiol-dihydromyricetin composite nano-coacervate which can synchronously solve the problems of synergistic bacteriostasis, membrane rupture and antibiosis, anti-inflammatory repair, application defects of active ingredients and the like of common animal skin antibacterial drugs. The preparation method of the composite nano coacervate is simple, large-scale production is easy, complex equipment is not needed, it can be ensured that active ingredients of a finished product are evenly distributed, the composite nano coacervate can penetrate through the skin cuticle and can also penetrate through a bacterial biofilm, and the synergistic effect is fully achieved.

The application discloses a gastric cancer immunotherapy efficacy prediction biopsy sample MHC-II expression kit and belongs to the field of kit preparation, and particularly relates to a preparation method of an antigen repair solution, which is prepared by mixing citric acid, sodium citrate, an additive and pure water, and the additive comprises a glucose amido polyether derivative and a propyl gallate / calcium ion complex. The gastric cancer immunotherapy efficacy prediction biopsy sample MHC-II expression kit is composed of the antigen repair solution; the kit comprises the following components in parts by mass: 20-30 parts of a dewaxing solution, 10-20 parts of the antigen repair solution, 2-10 parts of sheep serum, 10-20 parts of an enhancing solution, 15-25 parts of an antibody, 5-15 parts of a staining solution and 10-20 parts of a mounting agent. The gastric cancer immunotherapy efficacy prediction biopsy sample MHC-II expression kit provided by the application has high sensitivity and high specificity.

The invention provides a high-entropy nano enzyme. The chemical formula of the high-entropy nano enzyme is Mn < 0.4 > Co < 0.4 > Ni < 0.4 > Cu < 0.4 > Zn < 0.4 > Fe < 2.0 >) O. The invention also provides a preparation method of the high-entropy nano-enzyme, which comprises the following steps: dissolving manganese nitrate tetrahydrate, cobalt nitrate hexahydrate, nickel nitrate hexahydrate, copper nitrate trihydrate, zinc nitrate hexahydrate and sodium citrate in deionized water to prepare a clear solution A; dissolving potassium ferricyanide in deionized water to prepare a clear solution B; directly pouring the solution B into the solution A, stirring, standing and aging the obtained mixed solution at room temperature, and centrifugally collecting a product; and calcining the sample powder in a muffle furnace to obtain the high-entropy nano-enzyme. The invention further provides a catalyst which is composed of the high-entropy nano enzyme, 3, 3 ', 5, 5'-tetramethyl benzidine and H2O2. The invention also provides a method for detecting reduced glutathione by using the microfluidic paper chip analysis device. The invention provides a new normal form for constructing a multifunctional biosensing and environment monitoring platform.

The invention provides a fairy shrimp hatching device, a hatching method and application thereof.The continuous oxygen supply in the fairy shrimp hatching process is guaranteed by arranging a three-dimensional oxygenation device in a hatching tank, the three-dimensional oxygenation device comprises three layers of oxygen supply components, the first layer is oxygenated through a first oxygenation pipeline, the second layer is oxygenated through an annular pipeline, and the third layer is oxygenated through an annular pipeline; the third layer is oxygenated upwards through an oxygenating pipeline at the bottom, so that perfect circulating water flow is formed in the hatching tank, eggs are gently and circularly suspended and regularly move along with the water flow, and hard collision is reduced; meanwhile, sodium hyaluronate and sodium citrate are added into the hatching agent, the suspension effect in the egg hatching process can be kept, a better hatching microenvironment can be provided, the three-dimensional oxygenation device is matched, the hatching rate of the eggs in the fairy year is effectively increased, and the application prospect is wide.

The invention discloses a nano SiO2 composite iron microsphere toughening agent for well cementation cement, and belongs to the technical field of petroleum and natural gas well cementation engineering materials. The preparation method of the flexibilizer comprises the following steps: adding ferric trichloride into ethylene glycol, and stirring and dissolving at normal temperature to obtain a solution A; the preparation method comprises the following steps: adding polyvinylpyrrolidone into ethylene glycol, stirring and dissolving at a certain temperature to obtain a solution B, and then adding sodium citrate to prepare a solution C; tetraethoxysilane is added into deionized water and then mixed with the solution A, a hydrolysis reaction of tetraethoxysilane is carried out, and a solution D with nano SiO2 is prepared; gradually and slowly dropwise adding the solution D into the solution C at a certain temperature, and carrying out a first oxidation-reduction reaction; cooling to room temperature, adding sodium borohydride, and carrying out a second oxidation-reduction reaction; and filtering, washing and drying the solution to obtain the flexibilizer. The cement stone is endowed with high toughness and compressive strength through the synergistic effect of the iron elementary substance and the nano SiO2, and the cement stone has a wide market prospect.

The invention relates to a slow-release phosphorus removal agent as well as a preparation method and application thereof, in particular to a slow-release phosphorus removal agent for phosphorus pollution of a low-temperature water body as well as a preparation method and application thereof. The slow-release phosphorus removal agent comprises the following components in parts by weight: 1500 parts of potato starch, 160 parts of sodium citrate, 100 parts of ammonium sulfate, 20 parts of sodium chloride, 60 parts of potassium chloride, 10 parts of magnesium sulfate, 10 parts of calcium chloride and 1 part of maltose, wherein the weight ratio of the maltose to the pure water is 1: 20000. The preparation method comprises the following steps: 1, preparing the potato starch-based slow-release medicament; 2, forming and purifying starch microspheres; and step 3, preparing a sustained-release medicament finished product. The method has the beneficial effects that low-temperature water body phosphorus removal flora is efficiently activated, and the phosphate removal efficiency is remarkably improved; the slow-release characteristic meets the low-temperature treatment requirement, and long-acting stable phosphorus control is achieved; and the method is environment-friendly, excellent in economical efficiency and suitable for large-scale application.

The application discloses a nickel-plated steel strip lead processing method and belongs to the technical field of metal material surface treatment. The method aims to solve the problems of poor plating layer adhesion, large internal stress and easy peeling of the existing nickel-plated steel strip lead. The process steps include: S1, steel strip oil removal treatment; S2, composite activation treatment: the oil-removed steel strip is immersed in a composite activation solution containing sodium citrate to remove the surface oxide layer and form an active adsorption film; S3, nickel plating: the activated steel strip is immersed in a sulfate plating solution containing saccharin and 1,4-butynediol as composite additives for electroplating to form a low-stress and high-density nickel plating layer; S4, post-treatment: cleaning and drying; S5, slitting and packaging. The application cooperates sodium citrate activation with a plating solution system containing stress relieving agents, significantly improves the adhesion between the substrate and the plating layer, reduces the internal stress of the plating layer, and the obtained product has no peeling and falling of the plating layer after repeated bending, low porosity and excellent comprehensive performance, and is particularly suitable for the manufacturing of high-performance electronic component leads.

The invention discloses a preparation method of high-performance porous carbon. The preparation method comprises the following steps: raw material pretreatment, activator mixing, slurry drying, heat treatment and post-treatment. Biomass carbon waste is selected as a carbon source, resource utilization of the waste is achieved, the production cost is reduced, environmental problems caused by waste incineration or landfill are reduced, a green activating agent composed of sodium citrate and monopotassium phosphate is adopted to replace a traditional high-corrosivity activating agent, and the environment-friendly effect is achieved. The preparation method has the advantages that equipment corrosion and environmental pollution are avoided, the subsequent washing process is simple, a strong corrosive reagent is not needed, the operation risk and cost are reduced, carbonization and activation can be synchronously completed through one-step heat treatment, the process steps are simplified, the preparation period is shortened, and meanwhile, the energy consumption is reduced by optimizing the heating rate and the heat treatment temperature.

The invention belongs to the field of food processing and safety, and provides a preparation method of low-GI triticale whole grain noodles. The optimal formula of the prepared low-GI triticale whole grain noodles comprises 13.60% of triticale modified wheat bran, 12.87% of vital gluten, 13.00% of resistant starch, 4% of Chinese yam powder, 0.8% of Sanzan gum and the balance of triticale flour. The predicted sensory score of the whole-grain noodles is 82.72, the sensory score of the whole-grain noodles obtained through verification experiments is 83.55, the GI value of the whole-grain noodles is 54.93, and the whole-grain noodles are low-GI food; the invention further provides a matched intelligent temperature-control rolling device capable of controlling temperature and humidity and used for noodle production, multiple rolling and low-temperature fermentation functions are integrated, and through cold air diversion and water mist humidification, the temperature and humidity are controllable, and the problems of equipment land occupation and process gaps are reduced.

The invention relates to the technical field of cleaning tablets, and provides a multi-effect cleaning tablet for a kitchen waste processor and a preparation method of the multi-effect cleaning tablet. The multi-effect cleaning tablet comprises a foaming cleaning layer, an oxidation sterilization layer and a deep decomposition layer, the foaming cleaning layer is arranged on one side of the oxidation sterilization layer, the deep decomposition layer is arranged on the opposite side of the oxidation sterilization layer, and the foaming cleaning layer comprises sodium bicarbonate, gluconic acid-delta-lactone, alkyl glycoside, limonene and a chelating agent; the oxidation sterilization layer comprises sodium percarbonate, potassium hydrogen peroxysulfate, potassium carbonate, sodium citrate and a stabilizer; the deep decomposition layer comprises biological enzyme. Gluconic acid-delta-lactone is adopted in the foaming cleaning layer of the multi-effect cleaning tablet to generate gluconic acid, so that the system is prevented from instantly and violently turning over, a middle-layer peroxidation system is favorably released at a proper time, invalid decomposition is reduced, strong acid or violent pH fluctuation is prevented from permeating into an inner layer, the enzyme inactivation risk is reduced, the foaming process is mild, and the foaming effect is good. And the integral integrity of the tablet can be maintained.

The invention relates to the technical field of biological medicines, and provides a method for reducing acetonitrile residues in a recombinant human brain natriuretic peptide stock solution, which comprises the following steps: sequentially carrying out purification chromatography and ultrafiltration treatment on the human brain natriuretic peptide stock solution; during purification chromatography, a mobile phase comprises a phase A and a phase B; the phase A is a mixed solution of citric acid and sodium citrate; and the phase B is a mixed solution of citric acid, sodium citrate and sodium chloride. A chromatographic system is utilized, the recombinant human brain natriuretic peptide is adsorbed on a chromatographic medium under a specific mobile phase condition, then the chromatographic medium is switched to a proper B-phase buffer solution for elution, and in the process, acetonitrile is effectively separated and removed due to the adsorption characteristic difference between the acetonitrile and the recombinant human brain natriuretic peptide on the chromatographic medium. According to the technical scheme, the problem that the residual amount of acetonitrile in the recombinant human brain natriuretic peptide stock solution in related technologies is large is solved.

The invention relates to the technical field of comprehensive utilization of vanadium titano-magnetite resources, in particular to a flotation combined reagent and a flotation method for vanadium titano-magnetite associated ultralow-grade cobalt-nickel ore. The flotation combined reagent comprises a copper ammonia compound activating agent composed of copper sulfate, ammonium carbonate and sodium citrate, a compound inhibitor composed of sodium humate, tannic acid and sodium tripolyphosphate, a main collecting agent butyl xanthate, an auxiliary collecting agent alkyl hydroxamic acid and a foaming agent diethylene glycol monobutyl ether. According to the method, a technical system of bulk flotation process-novel collaborative reagent system is constructed, so that the technical problem of recycling associated ultralow-grade cobalt and nickel resources in the vanadium titano-magnetite iron separation tailings is successfully solved, the problem of low separation efficiency of ultralow-grade minerals is effectively solved, a complete and efficient technical scheme is formed, and the method is suitable for industrial production. And an innovative technical path is provided for comprehensive recovery of associated cobalt and nickel resources of the vanadium titano-magnetite.

The application provides a preparation method of bismuth nanoparticle material and application thereof, and dissolves bismuth nitrate pentahydrate in ethylene glycol to prepare a solution, then adds nitric acid to accurately adjust the pH value of the solution to 1.0; dissolves sodium citrate in ethylene glycol to prepare a solution; mixes the two solutions and uniformly mixes; transfers the mixed solution to a microwave reaction kettle, and under the condition that the temperature is 110-130 DEG C and the microwave power is 300-500 W, radiates and reacts for 20-40 min; cools to room temperature, and the obtained product is washed by centrifugation with ethanol for multiple times, and dried, to obtain black bismuth nanoparticles. The application accurately controls the acidic environment of the precursor solution by nitric acid, and utilizes the synergistic and co-reduction effect of sodium citrate and ethylene glycol to quickly and controllably reduce Bi 3+ to elemental Bi to form nanoparticles. The application has outstanding advantages in efficiency, controllability, environmental protection and cost.

Dairy products are produced by subjecting a starting dairy material to nanofiltration to remove monovalent ions to produce an ion-depleted dairy permeate; passing the ion-depleted dairy permeate through an ion exchange column and subsequently with a sodium-containing eluting solution to produce sodium phosphate and sodium citrate derived from the starting material; concentrating the sodium phosphate and sodium citrate; and combining the concentrated sodium phosphate and sodium citrate with dairy components. The dairy product contains an amount of the concentrated sodium phosphate and sodium citrate sufficient to cause fat in the dairy product to be emulsified and protein in the dairy product to be hydrated. In addition or alternatively, a dairy by-product stream may be subjected to ion exchange to remove calcium therefrom; concentrated, and combined with dairy materials naturally containing phosphate and citrate in order to adjust the citrate+phosphate-to-calcium ratio to reach an emulsified dairy product.

The invention relates to the technical field of photocatalytic CO2 reduction, in particular to a Cu2O-coated CuS composite photocatalytic material with a core-shell structure as well as a preparation method and application of the Cu2O-coated CuS composite photocatalytic material. The preparation method comprises the following steps: mixing copper sulfate, sodium citrate, water, a sodium hydroxide solution and an ascorbic acid solution, standing, and washing and drying collected precipitates to obtain Cu2O with a cubic structure; the method comprises the following steps: mixing Cu2O with water and sodium sulfide, carrying out a stirring reaction, and washing the collected precipitate to obtain a washed precipitate; and mixing the washed precipitate with water and thioacetamide, carrying out a hydrothermal reaction, and washing and drying the collected precipitate to obtain the Cu2O-coated CuS composite photocatalytic material. The core-shell structure Cu2O coated CuS composite photocatalytic material prepared by the invention can effectively enhance the photocatalytic CO2 reduction activity and cycling stability, and has a wide development prospect.

This application discloses a selective absorption membrane, its preparation method, and its application, belonging to the field of solar thermal collection technology. The selective absorption membrane is prepared by anodic etching of copper foil in sodium hydroxide, sodium citrate, and copper sulfate. Compared with vacuum deposition, this preparation method uses readily available raw materials, is simple to operate, and is low in cost. Furthermore, the prepared selective absorption membrane exhibits higher absorptivity in the short-wavelength region, which is beneficial for improving photothermal conversion efficiency. When used in the preparation of solar thermal collectors, it can quickly and efficiently convert solar energy into thermal energy. Photothermal biochar prepared from anaerobic fermentation sludge exhibits excellent adsorption performance. Its application in wastewater treatment forms a closed-loop process of "carbon source capture – anaerobic fermentation – photothermal carbonization," significantly improving the biogas yield and organic matter degradation efficiency of the anaerobic fermentation system.

This invention belongs to the field of biosensing technology, specifically relating to a modified carbon fiber electrode for detecting dopamine, its preparation method, and its application. The modified carbon fiber electrode comprises a carbon fiber electrode onto which gold-platinum bimetallic nanoparticles and polydopamine are sequentially modified. The preparation method specifically includes: firstly, modifying the surface of activated carbon fiber filaments with chloroauric acid and sodium citrate to obtain Au@CF; then, modifying the Au@CF surface with ascorbic acid and chloroplatinic acid to obtain platinum nanoparticles, obtaining Au / Pt@CF; finally, immersing the Au / Pt@CF in a dopamine solution to coat the Au / Pt@CF surface with polydopamine, obtaining PDA@Au / Pt@CF. This electrode has advantages such as high sensitivity, low detection limit, strong anti-interference ability, good biocompatibility, and high mechanical stability, making it suitable for dynamic monitoring of dopamine in the living brain.

The invention discloses a pomacea canaliculata egg wrapping type inactivator and a preparation method thereof, and belongs to the technical field of biopesticides, the pomacea canaliculata egg wrapping type inactivator comprises a component A, a component B and a component C which are physically isolated and independently packaged, the component A is biopolymer matrix liquid and comprises a film-forming framework polymer; the film-forming skeleton polymer is alginate, a composite polymer, weak acid, an endogenous slow-release calcium source and water, and the composite polymer is chitosan; the component B is a gel activating solution and comprises a cross-linking activating agent, water and a modifying agent; the modifier is one of sodium citrate, cellulose nanocrystal or nanoclay; when the component A and the component B are in contact on the surface of an ampullaria gigas egg mass, the component A and the component B are subjected to an in-situ gel reaction to generate a layer of physical barrier gel film; the defects that an existing dehydrating agent scheme is not resistant to rain wash and poor in persistence are overcome, and the core component is derived from biomass and is environmentally friendly.