189 results about "Trisodium citrate" patented technology

The invention relates to the technical field of fluorescent hydrogel, in particular to high-strength and high-stability fluorescent hydrogel as well as a preparation method and application thereof, the fluorescent hydrogel is formed by physical crosslinking of a hydrogel matrix, a rare earth fluorescent complex and a stabilizer, the hydrogel matrix is of a double-network structure formed by physical crosslinking of polyvinyl alcohol and carboxymethyl cellulose; the rare earth fluorescent complex is formed by connecting rare earth metal ions and an organic antenna material through coordination; the stabilizer is trisodium citrate. Compared with other fluorescent hydrogel, the fluorescent hydrogel with high strength and high stability provided by the invention has the advantages that the phenomena of fluorescence decay and fluorescence quenching caused by metal ions and saturated salt solution are avoided, and the fluorescence is kept stable in a wide pH range. Because the fluorescence characteristic is not influenced by environmental corrosion factors, the information can be stably displayed for a long time, and the method can be used for information encryption and anti-counterfeiting in an extreme environment.

The invention relates to the technical field of high-performance polyester, and discloses a modified preparation method of functionalized antibacterial polyester fibers, which comprises the following steps: S1, graphene is treated by oxygen-argon mixed plasma to obtain hydroxylated graphene; s2, after hydroxylated graphene is dispersed, cerium nitrate and sodium citrate are added, and cerium-based metallized graphene is obtained; s3, carrying out a reaction on the cerium-based metallized graphene and 3-(2-aminoethylamino) propyltrimethoxysilane, so as to obtain aminated graphene; s4, aminated graphene dicyandiamide, ammonium chloride tetraethoxysilane and hexadecyl trimethyl ammonium bromide are subjected to a reaction, and guanidyl-meso-porous silicon-metal composite graphene is obtained; s5, reacting the product with epsilon-polylysine and polycaprolactone to obtain a modified composite antibacterial agent; s6, treating the polyester fibers with a mixed solution of alkali and a surfactant; s7, the polyester fibers react with a solution containing an antibacterial agent, tetrabutyl titanate, an initiator and a dispersing agent, and a finished product is obtained.

The invention discloses concrete with anti-freezing performance and a preparation method thereof, and belongs to the technical field of concrete. The invention aims to solve the problems that the porosity of an interface transition area is high, hydration products are easy to degrade and the anti-freezing and anti-permeation performances are insufficient under the working conditions of high altitude, low air pressure, strong ultraviolet rays and salt-freezing synergy of the existing large-dosage fly ash concrete. The concrete is prepared from the following components in parts by weight: 100 parts of cement, 100 to 150 parts of coal ash, 280 to 320 parts of fine aggregate, 1000 to 1200 parts of modified basalt coarse aggregate, 1.5 to 3.5 parts of polycarboxylic acid water reducing agent, 0.2 to 0.6 part of PEG (Polyethylene Glycol) coated chitosan quaternary ammonium salt microspheres, 0.05 to 0.25 part of chitosan grafted nano cerium oxide composite particles, 1.0 to 3.0 parts of bacillus pseudofirmus microcapsule-polyvinylpyrrolidone mixture and 0.03 to 0.12 part of trisodium citrate. Through the synergistic effect of all the components, the interface structure of the concrete is effectively optimized, the ultraviolet aging resistance, the salt-freezing synergistic damage resistance and the chloride ion infiltration resistance are improved, the high-altitude severe service condition is adapted, and reliable material support is provided for high-altitude infrastructure construction.

The invention discloses a nano-enzyme detection method for aflatoxin B1, and relates to the technical field of analysis and detection.The method comprises the following specific steps that nano-enzyme preparation and carrier selection are conducted, specifically, nano-gold is prepared through a sodium citrate reduction method to serve as the nano-enzyme, a chloroauric acid solution is added into a round-bottom flask and heated to be boiled, and a carrier is obtained; according to the method, the PNIPAM serves as an immobilization carrier of the nano-enzyme, reversible immobilization of the nano-enzyme is achieved, cyclic utilization of the nano-enzyme is promoted, the detection cost is reduced, after detection is completed, phase change of the PNIPAM can be achieved by changing environmental conditions, and therefore effective separation of nano-gold and the carrier is achieved; after the recovered nanogold is washed and subjected to re-functionalization treatment, the catalytic activity of the nanogold is maintained, and the nanogold can be used for detecting aflatoxin B1 again, so that the utilization rate of the nano-enzyme is increased, and the waste of resources is reduced.

The application provides a preparation method of a SERS substrate of a zirconium-based MOF-808 / AuNPs. The method comprises three steps: in the first step, an AuNPs solution is prepared by using deionized water, chloroauric acid and sodium citrate to perform an oil bath reaction to obtain the AuNPs solution; in the second step, MOF-808 is prepared by mixing zirconium chlorohydrate, 1,3,5-benzene tricarboxylic acid, N,N-dimethylformamide and formic acid, and then performing a hydrothermal reaction on the mixed solution, centrifuging and vacuum drying to obtain activated MOF-808-Zr powder; in the third step, the activated MOF-808-Zr powder is dissolved in anhydrous ethanol, and then fully stirred and mixed with AuNPs solutions of different amounts to form a zirconium-based MOF-808 / AuNPs solution; and in the fourth step, the zirconium-based MOF-808 / AuNPs solution is poured into sample boxes containing silicon substrates, and the silicon substrates are immersed, and after drying, a SERS substrate of the zirconium-based MOF-808 / AuNPs is obtained. The method has the advantages of simple preparation process, low cost, good uniformity of the prepared substrate, good signal repeatability, high sensitivity, good structural stability and the like.

The invention provides a breeding method suitable for breeding litopenaeus vannamei in saline-alkali soil, and relates to the technical field of aquaculture. According to the breeding method suitable for breeding the litopenaeus vannamei in the saline-alkali soil, the proportion of Ca < 2 + > to Mg < 2 + > to K < + > in a water body is optimized to be 2.8: 1: 0.3 by customizing a compound ion regulation and control solution, SO4 < 2-> / Cl <-> is controlled to be 0.14-0.8, and the pH is stabilized to be 8.2-8.8 in combination with a citric acid-sodium citrate buffer system; a slow-medium-fast segmented domestication strategy is adopted to adapt to different development stages of the fries; ethanol clostridium protein (CAP) is added into the feed to be combined with compound probiotics, so that immune metabolism regulation and control are enhanced. Experiments prove that according to the method, the survival rate of the litopenaeus vannamei seedlings reaches 86.3% + / -2.1%, the culture period is shortened by 12-15 days, the hepatopancreas SOD activity is improved by 42.6%, the vibrio inhibition rate reaches 78.5%, and the method is remarkably superior to the prior art. The method does not need large-scale pond transformation, adapts to different types of saline-alkali soil water bodies, realizes efficient green culture, and has important application value.

The invention discloses bacteriostatic gel for gynecology and a preparation method thereof, and relates to the technical field of bacteriostatic gel. The antibacterial gel is prepared from a gel matrix, a plant extracting solution, antibacterial peptide, a humectant, astaxanthin microcapsules and a specific buffer solution. The buffer solution contains sodium citrate, hyaluronic acid and citric acid, and intelligent regulation and control of the drug release behavior of the astaxanthin microcapsule are realized by utilizing the synergistic effect of a hyaluronic acid and citric acid buffer system and preferably adopting hyaluronic acid compounded or modified with different molecular weights. The gel can maintain stable drug release in a normal vagina and pathological fluctuation pH environment, and trigger accelerated release in a high active oxygen inflammation environment, so that the problems that the release behavior is greatly influenced by environmental fluctuation and cannot adapt to different disease stages in the prior art are effectively solved, accurate and personalized drug delivery is realized, and the drug delivery efficiency is improved. The antibacterial agent has the advantages of good antibacterial effect and high environmental adaptability.

The invention discloses a preparation method of a luminescent material for an epoxy negative photoresist, and belongs to the technical field of photoresists. The preparation method comprises the following steps: mixing Yb / Er / Tm doped rare earth chloride with oleic acid, 1-octadecene and oleylamine, dehydrating to form a homogeneous complex, injecting NaOH and NH4F solutions, and synthesizing an up-conversion nano core dispersion liquid at high temperature; heating the gold nanoparticles, adding HAuCl4, sodium citrate and PEI, and performing in-situ reduction to form a gold nanoparticle modification layer; successively adding GPTMS, APTES, PTMS, deionized water and ammonia water, and carrying out a hydrothermal reaction to prepare a functionalized siloxane shell layer; adding dopamine hydrochloride, and performing oxidative polymerization in a Tris buffer solution to form a polydopamine layer; adding thiolated polyethylene glycol to passivate, and centrifugally drying to obtain a nano luminescent material; and adding bisphenol A epoxy resin and other photoresist systems, and carrying out high-speed shearing and ultrasonic dispersion to obtain the uniform luminous composition. According to the method, plasmon enhancement and surface collaborative optimization are realized, the luminous intensity, heat and moisture resistance, resolution and adhesive force are improved, and the method is suitable for a high-performance photoetching process.

The invention relates to the technical field of electrochemical water treatment, in particular to a preparation method of a self-supporting antimony-doped tin dioxide nanoflower electrode, which comprises the following steps: dissolving trisodium citrate dehydrate and antimony trichloride in absolute ethyl alcohol; then adding water and stannous chloride dehydrate to form a precursor solution; heating the precursor solution, and naturally cooling; after cooling, carrying out solid-liquid separation on the bottom mud, and then cleaning and drying to obtain antimony-doped tin dioxide powder; taking antimony-doped tin dioxide powder, a pore-forming agent and a binder, grinding the materials until the materials are uniformly mixed, and transferring the materials into a tabletting mold for pressure casting to obtain a blank; and calcining the green body to obtain the product. Nano-flower-shaped antimony-doped tin dioxide powder is prepared, in the die casting and sintering process, due to the fact that nano-flower petals of the nano-flower-shaped antimony-doped tin dioxide powder are mutually staggered, a connection mode similar to a mortise and tenon joint mode is formed, and compared with nanospheres, the binding force between the powder is enhanced; and the mechanical strength, the electrochemical active area and the catalytic activity of the electrode are improved.

The invention relates to a water-based asphalt cleaning agent and a preparation method thereof, and belongs to the technical field of environment-friendly cleaning agents. The cleaning agent is prepared from the following components in percentage by mass: 3.5 to 6.5 percent of a D-limonene oxidized derivative, 0.8 to 1.5 percent of a C4-C6 perfluoroalkyl acrylate monomer, 0.3 to 0.7 percent of a betaine type quaternization reagent, 4 to 8 percent of alkyl glycoside, 2 to 4 percent of polyglycerol fatty acid ester, 1 to 2 percent of trisodium citrate, 0.3 to 0.8 percent of polyepoxysuccinic acid, 0.02 to 0.1 percent of a photoinitiator, 0.2 to 0.6 percent of a thickening agent and the balance of deionized water. According to the method, the terpene-fluorocarbon hybrid ampholytic surfactant is generated in situ through UV illumination of a D-limonene oxidation derivative and a C4-C6 perfluoroalkyl acrylate monomer at 55-60 DEG C, and a thermodynamically stable micro-emulsion structure is formed through programmed cooling and self-assembly, so that the rapid removal capability on high-viscosity asphalt is remarkably improved.

The invention relates to a preserving fluid for stabilizing viruses at normal temperature and high temperature as well as a preparation method and application of the preserving fluid. The preserving fluid is an aqueous solution containing the following components in concentration: 2mM-15mM of ethylenediamine tetraacetic acid tetrasodium salt, 5mM-20mM of sodium citrate, 0.1 wt%-10wt% of tween-20, 10wt%-30wt% of a structure stabilizer, 0.5 wt%-10wt% of an amide solution, 0.5 wt%-10wt% of a hemolysis inhibitor, 0.05 wt%-10wt% of a reducing agent and 0.1 mM-2mM of 3-morpholine propanesulfonic acid. According to the preservation solution, the formula is optimized, and particularly, the amide solution and the reducing agent component are matched with MOPS for use, so that the activity of viruses in a sample under normal-temperature and high-temperature conditions can be greatly maintained, and the stability of nucleic acid is effectively improved.

The invention discloses a private care wet tissue containing a bacteriostatic composition, the private care wet tissue comprises a composite non-woven fabric base material and an impregnation liquid, the impregnation liquid comprises the bacteriostatic composition, a soothing anti-inflammatory agent, a moisturizing repairing agent, an odor removal regulator, a cosolvent and a stabilizer; the preparation method comprises the following steps: adding purified water, a citric acid-sodium citrate buffer agent and EDTA (Ethylene Diamine Tetraacetic Acid) disodium into a vacuum stirring tank, then adding glycerol, micromolecular sodium hyaluronate and ceramide 3, and then adding L-lactic acid and a lactobacillus acidophilus fermentation product; sequentially adding nisin, cranberry extract, polyhexamethylene biguanide hydrochloride and beta-cyclodextrin inclusion tea tree essential oil, and finally adding dipotassium glycyrrhizinate, allantoin and citrus extract. Different from the prior art that private care wet tissues only have a single antibacterial function and neglect flora balance, peculiar smell is covered by depending on essence, the base material and the steeping liquor are designed at the same time, and the functions of bacteriostasis and antibiosis, gentle private care, odor removal and itching relieving, inflammation prevention and swelling prevention, flora balance maintenance and the like are achieved.

The application provides a fast-hardening early-strength high-pressure and freeze-resistant cement material and a preparation method thereof, belongs to the technical field of cement materials, and the cement material comprises silicate cement clinker, natural anhydrous gypsum, calcined kaolin, calcined quartz powder, a silicon-aluminum-titanium composite mineralized early-strength freeze-resistant agent, a crystal bridge-pore dual functional agent and the like. The silicon-aluminum-titanium composite mineralized early-strength freeze-resistant agent is prepared by sintering, quenching and heat reaction of bauxite, silica fume, titanium dioxide, anhydrous calcium chloride and trisodium citrate, and surface modification by KH-550. The crystal bridge-pore dual functional agent comprises a calcium silicate hydrate crystal bridge agent and a polymer-SiO2 composite elastic pore forming agent. The polymer-SiO2 composite elastic pore forming agent is prepared by shearing emulsification of an oil phase prepared from styrene, butyl acrylate, divinylbenzene and polyglyceryl-10 diisostearate and an aqueous phase prepared from deionized water, sodium dodecyl sulfate and polyethylene glycol allyl methyl ether, ammonium persulfate reaction and tetraethyl orthosilicate reaction.

The application relates to the field of immunohistochemical staining, in particular to a DAB buffer and a DAB staining solution kit for DAB color development. The application discloses a DAB buffer for DAB color development, and the main components are hydrogen peroxide, nonylphenol polyoxyethylene ether, magnesium sulfate and trisodium citrate. The metal ions in the DAB buffer can enhance the electron transfer speed between DAB and hydrogen peroxide, and improve the color development sensitivity. The nonylphenol polyoxyethylene ether can stabilize the hydrogen peroxide, so that the hydrogen peroxide can be stored for a longer time and the cost is saved. The application further discloses a DAB staining solution kit, which comprises a blocking agent, a reaction enhancer, an enzyme-labeled polymer IgG, a DAB concentrated solution, a DAB buffer and hematoxylin, and the above-mentioned DAB buffer for DAB color development. The DAB staining solution kit of the application can improve the detection sensitivity of immunohistochemical staining, and can also improve the storage stability of the DAB color development solution and reduce the cost.

The invention discloses a catalyst for preparing N-(1-ethyl propyl)-3, 4-dimethylaniline through continuous catalytic hydrogenation and a preparation method and application thereof, the catalyst comprises a carrier, and an active component platinum and an auxiliary component which are loaded on the carrier, the auxiliary component is at least one of sodium citrate, disodium ethylene diamine tetraacetate, sodium metavanadate, oxalic acid, zirconium oxychloride, yttrium nitrate or sodium carbonate; and the active component and the auxiliary component both account for 0.1-10% of the mass of the catalyst. The catalyst is used for preparing N-(1-ethyl propyl)-3, 4-dimethylaniline through hydrogenation, the reaction can be continuous, the safety performance is better, and the catalyst has high catalytic activity and stability.

The invention provides an environment-friendly cleaning agent. The cleaning agent is prepared from the following components in percentage by weight: 1520% of modified alkyl glycoside, 812% of trisodium citrate, 35% of nano silicon dioxide, 24% of polyether modified siloxane, 12% of matrine extract, 0.08 0.12% of EDTA (Ethylene Diamine Tetraacetic Acid) disodium, 0.81.2% of lipase, 0.30.5% of protease, 0.30.5% of trehalose and the balance of deionized water. The cleaning agent provided by the invention has three decontamination mechanisms of chemical decomposition, physical adsorption and biological enzymolysis, can well clean the equipment transmission chain, and has good antirust function and environmental protection performance.

The present application belongs to the technical field of nutritional functional food and health food, and particularly relates to a preparation method of marine fish skin collagen oligopeptide beneficial to promoting skin health, and a product and application thereof. The method comprises the following steps: after deep sea fish skin is pretreated by salt dissolution with a NaCl solution, trisodium citrate is added as an enzymolysis aid, and neutral protease (from Trichoderma reesei) and papain are sequentially used for two-step enzymolysis, and after enzyme inactivation, impurities are removed, sterilization is performed, and concentration, drying are performed to obtain the product. In vitro cell experiment verification shows that the product can significantly promote human skin fibroblast proliferation; in vivo animal experiment verification shows that the product can significantly increase skin moisture content, reduce transdermal water loss, increase hydroxyproline content, improve SOD activity and reduce MDA content. The product is suitable for the field of nutritional functional food and health food, and has a good application prospect in promoting skin health.

The invention relates to the technical field of wastewater treatment, in particular to a magnetic Fe3O4-coated UiO-66 composite material as well as a preparation method and application thereof. According to the specific technical scheme, sodium citrate dehydrate, ferric chloride hexahydrate and urea are dissolved in water at the room temperature, polyacrylamide is added for ultrasonic treatment, UiO-66 is added for continuous ultrasonic treatment, then a reaction is conducted at the high temperature, after the reaction is completed, an obtained product is recovered through magnetic separation, and the recovered sample is washed and dried to obtain the iron-based composite material. And the magnetic Fe3O4 and UiO-66 composite material is obtained. Through research and development of the Fe3O4-coated UiO-66 composite material, an effective scheme integrating the advantages of excellent adsorption capacity and convenient separation is provided for solving the problem of remediation of radioactive uranium pollution in water.

The application discloses a Raman enhancer and a preparation method and application thereof, and adopts an improved trisodium citrate reduction chloroauric acid method to prepare dopamine carbon dot modified gold nano Raman enhancer by taking dopamine carbon dot as a reducing agent and a stabilizer. When the Raman enhancer is used for detecting imazalil residues in tobacco, the dopamine carbon dot modified gold nano Raman enhancer is prepared, a linear relationship between the imazalil concentration and the peak area of a quantitative characteristic peak is established, and the surface enhanced Raman spectrum of the imazalil in the tobacco sample is detected. The dopamine carbon dot is synthesized for the first time, the dopamine carbon dot is introduced into the preparation of the gold nano Raman enhancer for the first time and is used as a reducing agent and a stabilizer, trisodium citrate is used as a reducing agent to reduce chloroauric acid, and a new method for synthesizing the gold nano Raman enhancer is provided. The gold nano has a remarkable Raman enhancement effect and the stability is remarkably enhanced. The gold nano can be stored in a refrigerator for more than half a year without agglomeration, can be stored at room temperature for a short period of time, and the storage does not affect the enhancement effect.

The invention relates to a preparation method of nano alpha aluminum oxide, and belongs to the technical field of nano material preparation. The method comprises the following steps: sequentially carrying out gradient acid etching treatment and silane coupling agent surface protection treatment on industrial aluminum powder; under the protection of inert atmosphere, the industrial aluminum powder subjected to surface protection treatment is subjected to low-temperature ball milling treatment, and superfine activated aluminum powder is obtained; mixing the superfine activated aluminum powder, a polyaluminum chloride solution and trisodium citrate to obtain an aluminum source mixed solution; under the protection of an inert atmosphere, sequentially carrying out a first-stage hydrolysis reaction and a second-stage hydrolysis reaction on the aluminum source mixed solution to obtain aluminum hydroxide sol; absolute ethyl alcohol is added into the aluminum hydroxide sol for solvent replacement treatment; adding polyethylene glycol into the aluminum hydroxide sol subjected to solvent replacement treatment for stabilizing treatment to obtain stable mixed sol; and sequentially carrying out spray drying treatment and calcination treatment on the stable mixed sol to obtain the nano alpha alumina.

The invention discloses a copper-iron prussian blue / graphene oxide composite electro-catalysis cathode and a preparation method thereof. The method comprises the following steps: dissolving copper chloride, single-layer graphene oxide powder, citric acid and sodium citrate in water by adopting a one-step coprecipitation method, heating in a water bath, carrying out a heat preservation reaction to form a copper source precursor solution, mixing the copper source precursor solution with a potassium ferricyanide solution, carrying out heat preservation aging, taking the precipitate, carrying out centrifugal washing, drying and grinding to obtain catalyst powder, and drying the catalyst powder to obtain the single-layer graphene oxide / potassium ferricyanide composite catalyst. Finally, the powder and PVDF are mixed and dissolved in NMP, hydrophilic carbon cloth is coated with the mixture, and the copper-iron prussian blue / graphene oxide composite electro-catalysis cathode is prepared. The preparation process is simple, mass production can be achieved, the prepared composite electro-catalysis cathode has efficient hydrogen peroxide production capacity and in-situ Fenton catalysis capacity, active oxygen species can be effectively generated for organic pollutant degradation, and the application potential of a Prussian blue analogue material in the field of water treatment is greatly improved.

The application belongs to the technical field of substance extraction, and relates to a method for simultaneously extracting PDRN and active ingredients from plants, algae or fungi, products and applications thereof, the method comprising the following steps: mixing a sample with an enzyme-containing aqueous solution to perform enzymolysis, to obtain an enzymolysis solution; performing ultrasonic treatment on the enzymolysis solution, mixing the enzymolysis solution with an extraction buffer to perform extraction, to obtain an extraction solution; performing filtration and centrifugation on the extraction solution, and performing ultrafiltration treatment on the supernatant, to obtain the product; the sample comprises at least one of plants, algae or fungi; the extraction buffer comprises trehalose, L-cysteine, ascorbic acid, sodium citrate, cetyltrimethylammonium bromide, polyvinylpyrrolidone, NaCl, Tris-HCl buffer, EDTA-disodium, and water is used as a solvent. The method can simultaneously extract PDRN and active substances, solves the technical problem that active ingredients cannot be retained when PDRN is extracted, and the obtained extract has excellent anti-inflammatory and soothing effects.

This invention discloses a pretreatment solution for the etching process of aluminum foil for aluminum electrolytic capacitors based on synergistic complexation and its application method. The treatment solution contains sodium hydroxide, zinc oxide, a complexing agent, and a surfactant, and zinc chloride and potassium hydroxide can be added as needed. The complexing agent is at least one of sodium gluconate, sodium citrate, or disodium EDTA, and the surfactant is at least one of sodium dodecylbenzenesulfonate and sodium dodecyl sulfate. This invention inhibits the formation of Zn(OH)₂ precipitate through the synergistic chelation effect between the complexing agent and metal ions, enhances the surface activity of the aluminum foil, and improves the oxide film removal rate and the uniformity of corrosion porosity. In application, the aluminum foil is immersed in the treatment solution at 40-70℃ for 30-180 seconds with a stirring speed of 50-200 rpm. This invention is phosphorus-free and environmentally friendly, with high solution stability, and can increase the specific capacitance of the etched aluminum foil by more than 17.3%. It is suitable for the production of aluminum foil for high-voltage, high-specific-capacitance aluminum electrolytic capacitors and has high industrialization value.

The invention discloses a method for extracting tellurium from a sodium tellurite solution through electrodeposition, and belongs to the technical field of non-ferrous metal hydrometallurgy. The method comprises the following steps: dissolving crude tellurium dioxide in a sodium hydroxide solution at 60-90 DEG C to prepare a sodium tellurite electrolyte containing 200-240 g / L of tellurium and 90-110 g / L of sodium hydroxide; in the electrodeposition process, a composite additive composed of sodium ascorbate, pentasodium diethylenetriamine pentaacetate, sodium citrate and polyvinylpyrrolidone is synchronously added into the electrolyte. And carrying out electrodeposition for 14-15 days under the conditions that the current density is 40-60A / m, the voltage is 15-30V and the temperature is 15-30 DEG C. Through the synergistic effect of the composite additive, tellurite radicals in the anode region are remarkably inhibited from being oxidized into insoluble sodium tellurate, heavy metal impurity ions in the electrolyte are strongly complexed, and therefore the direct recovery rate of tellurium is increased to 90% or above while the better current efficiency is kept, and the purity of the obtained tellurium ingot reaches 99.95% or above.

This invention discloses a multifunctional electrolyte for zinc-bromine flow batteries and its preparation method, belonging to the field of electrochemical energy storage technology. The method includes: dissolving an electrolyte in a solvent, and sequentially adding a supporting electrolyte, a positive electrode complexing agent, and a positive electrode additive to obtain a positive electrode electrolyte; the positive electrode additive is zinc iodide; the zinc iodide contains I... ‑ With Br2 / Br ‑ In the reaction system, Br2 forms mixed halide ions, achieving bromine inhibition and improving the overall conductivity and comprehensive electrochemical performance of the electrolyte. The electrolyte is dissolved in a solvent, and a supporting electrolyte and a first negative electrode additive are added sequentially to obtain the negative electrode electrolyte. The first negative electrode additive includes sodium acetate and sodium citrate. The combination of sodium acetate and sodium citrate forms a wide-range buffer system, which can dynamically adjust and stabilize the pH value of the electrolyte, improve the long-term stability of the battery, and extend the cycle life. The positive and negative electrode electrolytes constitute a multifunctional electrolyte for the zinc-bromine flow battery. The zinc deposition behavior is synergistically regulated by sodium salt buffering and ion coordination.

This invention discloses a method for stabilizing waste slurry from tunnel boring machines (TBMs), belonging to the field of construction waste disposal. The method adjusts the pH of the pre-dehydrated flocculated slurry to 7.5-8.5, and simultaneously adds konjac glucomannan, trisodium citrate, and low-grade diatomaceous earth under stirring. These three components react simultaneously in a one-pot process under alkaline conditions to form a rigid-flexible interpenetrating network structure, resulting in a stabilized slurry that does not leak free water under transport vibration conditions. This invention utilizes the synergistic effect of the cross-linking regulation of konjac glucomannan and trisodium citrate, and the rigid support of low-grade diatomaceous earth, effectively solving the problem of water seepage and leakage caused by vibration during slurry transportation. This invention features a simple process, rapid reaction, and uses all naturally sourced materials with good environmental compatibility. The treated slurry can be directly utilized as a resource, meeting the requirements of green construction.

The invention relates to the technical field of batteries, in particular to a battery monomer, a preparation method of a secondary battery, an electrolyte and an electric device. Each single battery comprises a positive pole piece, a negative pole piece and an electrolyte, at least partial structures of the positive pole piece and the negative pole piece are located in the electrolyte, the electrolyte comprises a metal ion complexing agent, and the metal ion complexing agent comprises an organic complexing agent and / or an inorganic complexing agent; the organic complexing agent comprises at least one of phenanthroline, a crown ether compound, oxalic acid, citric acid, tartaric acid, ethylenediamine tetraacetic acid and deferoxamine; and / or the inorganic complexing agent comprises at least one of sodium oxalate, sodium citrate, sodium tartrate and sodium ethylene diamine tetracetate. The metal ion complexing agent in the electrolyte can be combined with impurity metal ions in the electrolyte to form a stable complex, so that the risk that the impurity metal ions are separated out into dendritic metal foreign matters at an anode to pierce a diaphragm to cause self-discharge of the battery is reduced.

This application belongs to the technical field of mycotoxin detection technology, specifically relating to a Raman beacon COF nanoflower, its preparation method, and its application. The method involves dissolving trialdehyde phloroglucinol, o-toluidine, and polyvinylpyrrolidone in methanol, ultrasonically mixing, adding a catalyst for reaction, adding benzaldehyde after the reaction, allowing the mixture to stand, centrifuging, washing, and redissolving to obtain TpDBD-COF nanoflowers. These nanoflowers are then dissolved in a mixed solution of ethanol and water, followed by the addition of AgNO3 and ultrasonic adsorption. After adsorption, trisodium citrate is added for heating reaction, centrifuging, washing, and redissolving to obtain the Raman beacon COF nanoflowers. The COF nanoflowers prepared by this invention exhibit a highly enhanced and stable Raman signal, and their surface groups have the advantage of being directly used for biomolecule coupling, specifically for the sensitive detection of T-2 toxin in samples.

The invention relates to the technical field of disinfectant preparation, in particular to a disinfectant containing a potassium peroxymonosulfate compound and a preparation method of the disinfectant. The compound disinfectant is prepared from the following components in parts by mass: 60 to 80 parts of potassium peroxymonosulfate, 20 to 30 parts of a modified photoaccelerator, 10 to 15 parts of sulfamic acid, 5 to 10 parts of sodium hexametaphosphate, 1 to 3 parts of sodium dodecyl benzene sulfonate, 3 to 4 parts of sodium chloride, 1 to 2 parts of lemon essence, 0.3 to 1.5 parts of amaranth red pigment, 10 to 20 parts of trisodium citrate and 1 to 3 parts of an anti-caking agent, the composite disinfectant prepared by the invention has excellent microorganism killing performance, and can efficiently kill various microorganisms such as bacteria, fungi, viruses and the like; meanwhile, the disinfectant is safe and harmless to human bodies, does not cause potential health problems, does not generate adverse effects on the environment in the use process, is environmentally friendly and safe, and is an efficient, reliable, durable and safe disinfectant.

This invention relates to the field of fecal genomics kit technology, and particularly to a safe, rapid, and high-throughput kit for extracting fecal genomes and its usage method. The kit includes a sample preservation solution, magnetic beads, a lysis buffer, a washing buffer 1, a washing buffer 2, and an elution buffer. The sample preservation solution is composed of guanidine isothiocyanate, sodium citrate, Triton X-100, Tween 20, propidium iodide, and purified water. The magnetic beads are hydroxyl magnetic beads. The lysis buffer is composed of guanidine hydrochloride, Tris base, Tris hydrochloric acid, Triton X-100, isopropanol, and purified water. Washing buffer 1 is composed of guanidine hydrochloride solution and isopropanol. Washing buffer 2 is composed of anhydrous ethanol and purified water. This kit can easily extract the genome from fecal samples, is simple to operate, safe and non-toxic, and can extract multiple samples at once, enabling rapid diagnosis and filling the gap in the current market for automated high-throughput kits for extracting genomes from fecal samples.