2349 results about "Carboxyl radical" patented technology

The invention provides a high-temperature-resistant and high-salt-resistant nano imbibition agent as well as a preparation method and application thereof. The high-temperature-resistant and high-salt-resistant nano imbibition agent is prepared from amination modified mesoporous silica nanoparticles, nano cellulose, rhamnolipid, an anionic surfactant, citrate modified sodium zirconium phosphate, polyethylene glycol-b-polycaprolactone and a sulfydryl-carboxyl imidazoline derivative, therefore, the composite carrier formed by the aminated mesoporous silica nanoparticles and the nanocellulose has high mechanical strength and uniform dispersity, the oil-water interfacial tension is reduced through the synergistic effect of the rhamnolipid and the anionic surfactant, and the crude oil stripping efficiency is remarkably improved; the citrate modified sodium zirconium phosphate enables the salt resistance of the system to be greatly improved, and in a high-temperature and high-salt oil reservoir environment, the nano imbibition agent can remarkably improve the crude oil recovery rate and reduce the injection pressure and dosage; meanwhile, good adsorption resistance is achieved, and reservoir blockage is prevented; in addition, low-toxicity corrosion inhibition components protect equipment, and the service life of an oil well is prolonged.

The invention discloses an alkaline electrolytic water hydrogen production diaphragm for strengthening hydroxyl ion transfer and a preparation method of the alkaline electrolytic water hydrogen production diaphragm. The diaphragm comprises a supporting base net and a hydrophilic gas insulation coating which is arranged on the supporting base net and contains a hydroxyl ion transfer carrier, the method comprises the steps that a supporting base net is pretreated; the preparation method comprises the following steps: dissolving a polymer binder, a pore-foaming agent, a hydroxyl ion transfer carrier and a hydrophilic metal oxide in an organic solvent according to a mass ratio to obtain hydrophilic slurry; uniformly coating two sides of a supporting base net with the hydrophilic slurry, and then carrying out non-solvent induced phase conversion to obtain the alkaline electrolytic water hydrogen production diaphragm for strengthening hydroxyl ion transfer; polar groups such as hydroxyl, amino and carboxyl are introduced into a traditional composite diaphragm to construct a hydrogen bond network, so that hydroxyl ions can be transmitted in a jumping manner along the dynamic hydrogen bond network in the diaphragm to promote transmission of the hydroxyl ions, the performance of the diaphragm can be improved, the materials are cheap and easy to obtain, the preparation process is simple and convenient, and industrial expanded production is facilitated.

The invention discloses an immunoregulation hydrogel as well as a preparation method and application thereof, and relates to the technical field of medical materials, amino-derived cationic polysaccharide, carboxyl-derived anionic polysaccharide and dopa-modified protein biopolymer materials are used as biological matrix materials, spermidine is used as a bioactive functional component, and the immunoregulation hydrogel is prepared by a one-step method. The preparation method comprises the following steps: by taking a benzaldehyde-terminated high polymer material as a cross-linking agent, forming a first layer of dynamic reversible cross-linked network structure through Schiff base reaction; then calcium ions are introduced, and the calcium ions and carboxylate radicals are complexed and cross-linked to form a second layer of static irreversible cross-linked network structure which can be used for an ESD (Electro-Static Discharge) operation. By adopting a step-by-step cross-linking mode, the first-step cross-linked single-network hydrogel has injectability, self-repairability, tissue adhesiveness and an immune regulation function, and the second-step cross-linking further ensures stable and lasting performance, so that the problems that a submucosal injection material is easy to disperse, short in lasting time and poor in stability are solved. The immunoregulation function effect of the wound repair material is poor.

The invention discloses a soluble alkaline salt scale inhibitor and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The soluble alkaline salt scale inhibitor is prepared from amphiphilic modified graphene oxide, a surfactant, inorganic salt and deionized water, the amphiphilic modified graphene oxide contains a large amount of carboxyl groups, sulfonic acid groups, hydroxyl groups and the like, and has good metal ion chelating property; meanwhile, through the hydrophobic association effect and hydrogen-bond interaction between modified graphene grafted long carbon chains, the bonding probability between sodium ions of the soluble saline-alkali salt and bicarbonate radicals, carbonate radicals and chloride ions is further weakened, and through the synergistic effect of the amphiphilic modified graphene oxide, the surfactant and the inorganic salt, the salt scale inhibition effect is further improved; the method is especially suitable for soluble alkali salt water quality conditions of high temperature, high alkali and high salinity, can solve the problems of oilfield water injection, fracturing flowback strata and wellbore salt deposition, and has a good popularization prospect.

The invention discloses an isoxazoline compound as shown in a formula (I) and application thereof. R1, R2 and R3 can be selected from halogen atoms, cyano groups, nitryl groups, C1-C3 halogenated alkyl groups and the like; q can be independently selected from A1 to A6; l1 and L2 may be selected from a carboxyl group, a C1-C6 alkoxycarbonyl group, a hydroxyl-substituted C1-C8 alkyl group, and the like; z1, Z2 may be selected from a hydrogen atom, a C1-C6 alkyl group, a C3-C5 cycloalkyl group, or C (O) M, wherein M is a C1-C6 alkyl group, a C2-C6 alkenyl group, or the like; the isoxazoline compound provided by the invention has no cross resistance with existing insecticides, has the advantages of quick pesticide effect, low dosage and the like, and particularly has an excellent control effect on rice-resistant chilo suppressalis, plutella xylostella, aphid and the like. The invention also provides an isoxazoline compound as a pesticide acceptable salt, a composition and an application of the isoxazoline compound. # imgabs0 #

The invention discloses an MOF-CQD enzyme-sensitive FRET hydrogel diagnosis and treatment probe as well as a preparation method and application thereof, and belongs to the technical field of biomedical detection and treatment. The probe takes a carboxyl carbon quantum dot (CQD) as a donor and a metal organic framework (MOF) as an acceptor, and the donor and the acceptor are connected through a replaceable enzyme response polypeptide bridge; when the fluorescence is complete, FRET is generated to quench the CQD fluorescence, the FRET is interrupted after the target enzyme cuts off the peptide bridge, and the blue / red fluorescence ratio is changed to realize nanomole-level quantitative detection and has self-correction capability. The probe is packaged in a four-arm PEG transparent hydrogel which does not need a photoinitiator and can be quickly self-crosslinked, and can be prepared into a film, a tooth socket and the like for POCT (point-of-care testing) of parts such as an oral cavity / skin and the like. After detection, the MOF is activated by illumination of 630-660 nm to generate active singlet oxygen, so that local antibacterial or anti-tumor treatment is realized, and a diagnosis and treatment integrated scheme is constructed.

The invention provides a material for removing sodium ions in saline-alkali soil and a preparation method, and relates to the field of sodium ion adsorbents, the preparation method comprises the following steps: (1) lignin modification: under a water bath condition, dissolving sulfate lignin in a mixed solution of analytically pure acetic acid and 30% hydrogen peroxide, then adding ferric chloride, reacting for 1.5-2.5 hours, diluting with distilled water by 7-8 times, centrifuging and washing to obtain modified lignin; drying to obtain oxidized lignin; (2) hydrogel synthesis: mixing and stirring the oxidized lignin and analytically pure acrylic acid, adding a cross-linking agent and an initiator, and reacting in a drying oven at 65-75 DEG C for 1.5-2.5 hours to form a sodium ion adsorption material with a porous interpenetrating network structure; by modifying the lignin, particularly introducing more hydroxyl and carboxyl groups, the performance of the lignin in the application of adsorbing ions, preparing hydrogel and the like can be improved.

The invention relates to the technical field of preparation of metal organic frameworks, and particularly discloses a preparation method and application of a porous MOF (Metal Organic Frame.The method comprises the following steps: dissolving a triblock copolymer PluronicF-127 in ultrapure water, adding acetic acid and sodium chloride, and uniformly stirring to form a solution; adding zirconyl nitrate into the solution, and adjusting temperature and reaction time through a metal ion diffusion optimization model to ensure uniform distribution of metal ions; organic ligands are introduced to adjust the pore size distribution of the MOF; carrying out surface functionalization on the synthesized MOF material, and introducing amino and carboxyl; washing and filtering the synthesized MOF material to remove impurities and residues, and then drying the MOF material under a vacuum condition to remove moisture and an organic solvent. According to the invention, the performance of the MOF material in the application of the electrochemical luminescence sensor is effectively improved.

The invention discloses a zinc-bromine flow battery multifunctional negative electrode electrolyte and a preparation method thereof, and belongs to the technical field of electrochemical energy storage, and the method comprises the following steps: uniformly stirring and mixing a solvent, deionized water and a cosolvent, adding an electrolyte, stirring until the electrolyte is completely dissolved, then adding a supporting electrolyte and a negative electrode additive, stirring until the supporting electrolyte and the negative electrode additive are completely dissolved, and obtaining the zinc-bromine flow battery multifunctional negative electrode electrolyte. The multifunctional negative electrode electrolyte of the zinc-bromine flow battery is obtained; the negative electrode cosolvent is dimethylformamide; and the negative electrode additive is at least one of saponin and cinnamyl aldehyde. Saponin molecules are adsorbed on the surface of the zinc electrode, and electronegative carboxyl groups of the saponin molecules form an electrostatic repulsion net in an electric double layer, so that zinc ions are forced to be uniformly dispersed, local ion concentration hot spots are eliminated, and dendritic crystal nucleation is inhibited from the source. In cinnamyl aldehyde, the strong electronegativity of oxygen atoms and the electronegativity of aldehyde oxygen are far higher than those of hydrogen, so that electrons are strongly attracted, adjacent carbon atoms are positively charged, polar adsorption sites are formed, the hydrogen evolution reaction is effectively inhibited, and the stability and the cycle life of the battery are greatly improved.

The present invention relates to a device (1) for the electroplating of a hard chromium layer made of a chromium(III) compound on a surface of a substrate (2), comprising an anode (3) and an electroplating bath (4) into which the substrate (2) acting as a cathode can be introduced, wherein the electroplating bath (4) contains a Cr(III) compound and a carboxyl compound of the formula R-COOH or a salt thereof, where R is a C1-10 alkyl radical, characterized in that the anode (3) is separated from the electroplating bath (4) by a cation-selective membrane (5). The present invention further relates to a method for the electroplating of a hard chromium layer made of a chromium(III) compound on a surface of a substrate (2) in this device (1), and to an article produced by this method comprising a chromium layer.

The invention discloses a low-temperature zinc ion battery high-entropy eutectic electrolyte and a preparation method and application thereof, and relates to the field of batteries, the electrolyte comprises a hydrogen bond donor, a hydrogen bond acceptor and a solvent; the hydrogen bond donor is at least one of methyl sulfonamide, thioformamide, butyramide, asparagine, tert-butylamine, dimethyl propane diamine, oxalyl diamine, benzamide, sulfamide and ethyl sulfonamide; the hydrogen bond receptor is at least one of aspartic acid, glutamic acid, methionine, zinc chloride, zinc perchlorate, zinc fluoborate and zinc acetate; the preparation method comprises the following steps: mixing a hydrogen bond donor and a hydrogen bond acceptor, and heating to convert a solid into a liquid phase; and adding a solvent, and uniformly mixing to obtain the product. The invention also provides a zinc ion battery containing the electrolyte. The high-entropy eutectic electrolyte has the beneficial effects that-NH2 and halogen or carboxyl form hydrogen bonds to perform eutectic reaction, the freezing point of the eutectic solution is lower than that of a reactant, and the solvent is added to improve the confusion degree of the electrolyte, so that the high-entropy eutectic electrolyte is prepared.

The invention provides a fertilizer synergist for reducing nutrient loss and inhibiting nitrification and application of the fertilizer synergist. The fertilizer synergist is prepared from the following components in percentage by mass: 95 to 98 percent of carboxyl cross-linked modified montmorillonite, 0.05 to 0.1 percent of mannan oligosaccharide, 0.1 to 0.5 percent of mannan, 1 to 3 percent of polyaspartate and 0.5 to 2 percent of a nitrification inhibiting aid. According to the fertilizer synergist capable of reducing nutrient loss and inhibiting nitrification and the application of the fertilizer synergist, the fertilizer synergist serves as a plant nutrient loss control synergist and a nitrification inhibitor and can activate a crop stress resistance signal source, promote and induce synthesis of endogenous auxin in plants, root and growth, activate phosphorus and dissolve potassium, reduce nitrogen loss and improve the yield of the plants. The fertilizer utilization rate is improved.

The invention discloses an optical-grade PET release film and a preparation method and application thereof, and belongs to the technical field of PET release liners.The preparation method comprises the steps that organic silicon resin, polyacrylate and functional silicone oil serve as raw materials, hexadecafluorophthalocyanine copper serves as a catalyst, sodium hydroxide provides hydroxyl anions, and hydroxyl-containing fluorinated hydroxyaniline is obtained; amino groups on the surface of fluorinated hydroxyaniline react with carboxyl groups of graphene oxide and are grafted on the surface of graphene oxide, then hydroxyl groups in the fluorinated hydroxyaniline and carboxyl groups of acrylic acid are subjected to esterification reaction under the action of a catalyst, so that acrylic acid is grafted on fluorinated modified graphene oxide, and the fluorinated modified graphene oxide is obtained. Therefore, hydroxyl and epoxy functional groups on the surface of the graphene oxide are consumed, hindering of electron transmission is reduced, the conductivity of the release film is improved, and the antistatic requirement of the release film is met.

The invention discloses a functionalized carbon quantum dot modified all-vanadium redox flow battery electrolyte. The functionalized carbon quantum dot has a large specific surface area and a carboxyl functional group on the surface; the electrolyte of the flow battery is a dilute sulfuric acid solution of vanadium; the main evaluation indexes of the electrochemical performance are the cycle efficiency, the capacity retention ratio and the battery performance of the electrolyte; the invention aims to discuss the catalytic action of the surface functional groups of the functionalized carbon quantum dots on the oxidation-reduction reaction of vanadium ions in the electrolyte of the all-vanadium redox flow battery by using the functionalized carbon quantum dots as an additive of the electrolyte. Meanwhile, the influence of the concentration and doping of the carbon quantum dots on the electrochemical performance of the electrolyte of the all-vanadium redox flow battery is researched, so that the working efficiency and the overall performance of the battery are improved, the characteristics of the electrolyte are improved, and the energy consumption of the battery is reduced.

The invention relates to the field of new energy storage materials, and discloses a multifunctional composite perfluorosulfonic acid ion exchange membrane for an all-vanadium redox flow battery, and the composite membrane comprises the following components: perfluorosulfonic acid resin which accounts for 60-90wt% of the total mass of the membrane and is used as a matrix material; the functionalized multi-walled carbon nanotube accounts for 5-15 wt.% of the total mass of the membrane, and carboxyl and hydroxyl are introduced through surface treatment; phosphotungstic acid accounts for 5-20wt.% of the total mass of the membrane, and is anchored on the surface of the functionalized multi-walled carbon nanotube through an electrostatic spinning process; n, N-dimethylformamide and isopropanol are used as solvents, and the solvents are mixed with a perfluorinated sulfonic acid resin solution according to the volume ratio of 1: 1. The proton conductivity, the vanadium ion barrier property and the tensile strength of the composite membrane are obviously superior to those of a traditional Nafion membrane. According to the technical scheme, an efficient and economical solution is provided for improving the overall performance of the all-vanadium redox flow battery, and the method has good application prospects and market value.

The invention relates to a preparation method of a cardanol compound 2. The reaction is as follows: # imgabs0 # R'is selected from H, carboxyl, halogen or halogen substituted C1-4 alkyl, and halogen is selected from fluorine, chlorine, bromine and iodine; comprising the following steps: (1) reacting a compound of formula 1 in the presence of sodium ethanethiol and inorganic base to obtain a compound 2; the preparation method provided by the invention is mild in process condition, simple and convenient to operate, high in yield, simple in post-treatment and suitable for industrial large-scale production.

The invention relates to a plasma metabolite composition for auxiliary diagnosis of sub-clinical mastitis of dairy cows and application of the plasma metabolite composition. The plasma metabolite combination is a first combination and / or a second combination, and the first combination is composed of glyceryl monolinoleate, 2-methylthiophene, L-cystine, (S)-(+)-citramalic acid, 9-hydroxy-10, 12-octadecadienoic acid, 16-hydroxyhexadecanoic acid, tyrosine hydroxyproline, stearoyl serotonin and histamine; the first composition is composed of 4, 5-dimethyl-2, 4, 5-trimethyloxazole, 12, 13-epoxy octadecadienoic acid, 2-cyclotetradecene-1-ketone, 4 [alpha]-carboxyl-5 [alpha]-cholest-8-ene-3 [beta]-alcohol, N-arachidonyl dopamine d8, 9 (Z) and 11 (E)-conjugated linoleic acid, and the second composition is composed of 2, 5-dihydro-2, 4, 5-trimethyloxazole, 12, 13-epoxy octadecadienoic acid, 2-cyclotetradecene-1-ketone, 4 [alpha]-carboxyl-5 [alpha]-cholest-8-ene-3 [beta]-alcohol, N-arachidonyl dopamine A product prepared based on the plasma metabolite composition and used for auxiliary diagnosis of cow subclinical mastitis is simple in use method and high in accuracy, can be used for assisting a milk somatic cell number method to diagnose cow subclinical mastitis, and reduces the probability of false negative and false positive.

The invention relates to a positive electrode material precursor with a stable structure and a preparation method and application thereof.The preparation method comprises the following steps that a metal salt solution, ammonia water, a complexing agent solution and a precipitator solution are mixed in a base solution in a parallel flow mode, a co-precipitation reaction is conducted, and the positive electrode material precursor with the stable structure is obtained; a complexing agent in the complexing agent solution comprises ammonia water and organic acid, and the molar ratio of ammonium radicals in the ammonia water to carboxyl groups in the organic acid is (0.1-5): 1. According to the preparation method of the positive electrode material precursor provided by the invention, by using the specific complexing agent solution, the crystal face size of the obtained positive electrode material is adjusted, and the crystal structure of the obtained positive electrode material precursor is optimized, so that the crystal structure stability of the corresponding positive electrode material is improved.

The invention discloses an aggregation-induced emission metal organic framework, a preparation method thereof and application of the aggregation-induced emission metal organic framework in portable detection of low-concentration nitrobenzene. According to the aggregation-induced emission metal organic framework, ZrCl4 provides Zr < 4 + >, 2-sulfonic terephthalic acid and AIE molecule 2, 3, 5, 6-tetra (4-carboxyl phenyl) pyrazine as organic ligands, an aggregation-induced emission fluorescent material is obtained through a solvothermal method, due to the coordination effect and limited intramolecular rotation, the material shows bright blue fluorescence, and the fluorescence intensity of the aggregation-induced emission metal organic framework is greatly improved. The aggregation-state fluorescence can be obviously quenched after the fluorescent probe is contacted with nitrobenzene. The aggregation-induced emission metal organic framework material is obtained by utilizing the aggregation-induced emission performance of aggregation-induced emission molecules, and the material has good detection capability on nitrobenzene, can rapidly and efficiently detect nitrobenzene in a solution, and has good cycle performance. Meanwhile, the nitrobenzene gas can be detected for multiple times, and good sensitivity and practicability are achieved.

The invention relates to the field of hydrogel materials, in particular to a hydrogel dressing as well as a preparation method and application thereof. The deferoxamine mesylate is loaded on the gelatin microsphere material constructed by the gelatin and the genipin, so that the loading dispersion of the deferoxamine mesylate can be benefited, and the added gelatin can be in contact with matrix proteinase-9 in a diabetic foot ulcer microenvironment for degradation so as to induce the release of the deferoxamine mesylate. A first cross-linked network is formed by the 3-carboxyphenylboronic acid modified chitosan and the oxidized hyaluronic acid, and the gelatin microsphere material loaded with the deferoxamine mesylate and the epigallocatechin gallate are coated with the first cross-linked network. The hydrogel dressing realizes controllable release of the deferoxamine mesylate and the epigallocatechin gallate, so that the technical problem of uncontrollable release of the deferoxamine mesylate is solved.

The invention provides a hydrogen bond organic framework material, a preparation method and application of the hydrogen bond organic framework material in dopamine detection, the preparation method of the hydrogen bond organic framework material comprises the following steps: S1, dissolving 1, 3, 5-tri (4-carboxyphenyl) benzene in an organic solvent to obtain an organic solution; and S2, dropwise adding an alcohol solvent into the organic solution to react to obtain turbid liquid, and drying to obtain the hydrogen bond organic framework material. The hydrogen bond organic framework material HOF-BTB prepared by the invention is a porous material, has two-dimensional (2D) pi-pi stacked hexagonal lamellas and complex eight interpenetration, generates a one-dimensional channel in the framework, and is simple in preparation process, mild in synthesis condition, low in cost, good in biocompatibility and low in cytotoxicity; and due to rigid organic construction molecules, the compound shows excellent fluorescence performance. The HOF-BTB material has high selectivity due to differential recognition of binding sites, and can be effectively applied to detection of dopamine.

The invention relates to the technical field of biological medicines, in particular to a preparation method of 18F-DOPA and an F-18 labeled precursor of 18F-DOPA. The structural formula of the F-18 labeled phenolic precursor compound is as shown in a formula I: # imgabs0 #; wherein R1 and R2 are hydroxyl protecting groups; r3 is a leaving group; r4 and R5 are independently hydrogen or an amino protecting group; and R6 is a carboxyl protecting group. The invention provides a simple and efficient < 18 > F-DOPA preparation method, and particularly relates to preparation of < 18 > F-DOPA by constructing a key phenol precursor compound and performing a simple and efficient photocatalytic deoxidation fluorination reaction on aromatic hydrocarbon. The method has the advantages of few steps, high yield, simplicity and convenience in operation, good repeatability and good automatic production potential. The radioactive tracer agent 18F-DOPA synthesized by using the method has high specific activity, high chemical purity and high radioactive purity, and has an important value for clinical popularization of 18F-DOPA.

The invention relates to the technical field of wastewater treatment, and discloses a preparation process of a flocculant applied to wastewater treatment.The preparation process comprises the steps that divinyl-containing diphenylethylene triazolyl amide butyric acid, acrylamide and starch are subjected to a cross-linking polymerization reaction, and an acrylamide-starch-based flocculant with a cross-linked network structure is obtained; the cross-linked network structure improves the specific surface area of the flocculant, increases adsorption sites, and improves the adsorption performance of metal ions such as cadmium. The acrylamide-starch-based flocculant contains functional groups such as triazole, carboxyl and Schiff base, nitrogen atoms in the triazole and the Schiff base contain lone pair electrons and can be coordinated and chelated with cadmium ions, and the carboxyl also has a very strong adsorption effect, so that the adsorption capacity and the adsorption rate of the flocculant to the cadmium ions are remarkably improved.

The invention provides a pharmaceutical wastewater treatment process. The pharmaceutical wastewater treatment process comprises the following steps: A1, pretreatment, A2, adsorption treatment, A3, oxidation treatment and A4, filtration treatment. In the step A2, a composite adsorbent comprising the following raw materials: attapulgite, activated carbon, carbon nanotubes, 4-carboxyphenylboronic acid, polyethyleneimine, sodium dithiocarbamate, epoxy resin E-44, deionized water and modified nano zero-valent iron is used, and self-repairing is realized through dynamic chemical bonds such as boric acid ester bonds, imine bonds and thiol-disulfide bonds; the adsorbent can be self-repaired during microscopic damage, so that the service life is prolonged, and relatively high adsorption capacity is kept. In the step A3, a gel microsphere oxidant comprising the following raw materials: hydrogen peroxide, potassium persulfate, copper-iron sulfide, nitrogen-doped carbon quantum dots, sodium alginate powder, sodium polyacrylate and a phosphate buffer solution is used, and efficient degradation is realized through a synergistic mechanism of free radical oxidation, non-free radical oxidation and photocatalysis.

The invention relates to the technical field of electrode materials, in particular to a wide-temperature-range high-iodine-loading positive electrode material, a preparation method thereof and a zinc-iodine battery. The method comprises the following steps: mixing activated carbon and iodine simple substance, and heating to sublimate and embed the iodine simple substance into the activated carbon to obtain iodine-loaded carbon black I2-coated CB; mixing gelatin and an acetic acid solution to obtain a gelatin binder solution; mixing the iodine-loaded carbon black I2-coated CB, a conductive agent and a gelatin binder solution to obtain iodine positive electrode slurry; and coating a stainless steel mesh with the iodine positive electrode slurry, and drying to obtain the wide-temperature-range high-iodine-loading positive electrode material. According to the wide-temperature-range high-iodine-load positive electrode material prepared by the method, active functional groups such as peptide bonds, carboxyl groups and amino groups of gelatin in the gelatin binder solution are utilized, the constraint capability on active iodine and the chemical adsorption effect on polyiodide are utilized, and therefore the problems of active iodine dissolution and polyiodide shuttling are effectively inhibited.

The invention discloses a zinc-bromine flow battery electrolyte, a negative electrode cosolvent and a preparation method thereof, and belongs to the technical field of electrochemical energy storage, the negative electrode cosolvent of the zinc-bromine flow battery electrolyte is a carboxyl-containing butenoic acid substance, the butenoic acid substance is used as the cosolvent, and zinc is induced to preferentially deposit on a (002) plane by modifying a solid-liquid interface, so that the zinc-bromine flow battery electrolyte is obtained. And the deposition process of zinc is converted from an irregular form which tends to form a dendritic crystal shape and a moss shape into a deposition layer which tends to form a flat and compact deposition layer which is parallel to the substrate. The highly uniform zinc deposition fundamentally and effectively inhibits the formation and growth of zinc dendrites, and greatly improves the stability of the negative electrode and the cycle life of the battery. Chlorides improve ionic conductivity to reduce internal resistance, and sodium acetate buffer inhibits hydrogen evolution on stable pH; and synergistic optimization of positive and negative components ensures efficient reaction. And moreover, the raw materials are easy to obtain, the preparation is simple and convenient, the industrialization threshold is reduced, and the large-scale energy storage requirement is met.

The invention discloses a green construction of a porous separation membrane and an efficient uranium separation / enrichment method thereof.The method comprises the steps that firstly, mixed-dimension attapulgite clay acid etching powder is modified through phytic acid and then added into a saponin plant extracting solution, and then the mixture is mixed with a sodium alginate-chitosan double-network matrix; a film-forming solution with a high-mechanical-stability gas-liquid interface is obtained through a Pickering foam template method, and then the porous separation film is controllably constructed through cooperative strategies such as film casting, calcium cross-linking and carboxylation. Based on the advantages of a rod / sheet mixed dimension structure of minerals, synergistic interaction of plant derivatives and a spatial orientation regulation and control synergistic mechanism of functional groups, a porous separation membrane with a specific porous structure, excellent mechanical properties and uranium separation efficiency is constructed in a green manner, and the uranium separation efficiency is improved by combining optimization of membrane layer stacking and elution strategies. A high-efficiency uranium separation / enrichment method is developed, and a new normal form is provided for solving uranium pollution prevention and control and resource recovery and enrichment by a membrane separation technology.

The invention relates to the technical field of gene engineering and recombinase catalysis engineering, in particular to a recombinant strain for expressing phenolic acid decarboxylase as well as a construction method and application of the recombinant strain. According to the invention, a recombinant strain for expressing the phenolic acid decarboxylase PADCs is constructed by heterologous expression of a coding gene PADCs of the phenolic acid decarboxylase. The enzyme liquid of the recombinant strain for expressing the phenolic acid decarboxylase has remarkable catalytic performance, p-coumaric acid can be used as a substrate, the recombinant strain is used for inducing expression, the purified enzyme liquid is used for catalyzing decarboxylation reaction of p-coumaric acid, and p-hydroxystyrene is synthesized; meanwhile, the phenolic acid decarboxylase PADCs has a wide substrate spectrum, the 4-vinylphenol compound can be used as a substrate, bicarbonate is used as a carboxyl source, the freeze-dried whole cell of the recombinant strain is utilized to catalyze the 4-vinylphenol compound to carry out regioselective beta-carboxylation reaction, a series of phenolic acids with biological activity are synthesized by an enzymic method, and meanwhile CO2 is immobilized; and a huge application potential is provided for the utilization of CO2.

The invention provides an efficient environment-friendly petroleum passivator as well as a preparation method and application thereof, and belongs to the technical field of passivators. The preparation method comprises the following steps: reacting bismuth nitrate with tetra (4-carboxyl phenyl) porphyrin and benzoic acid to prepare a carboxyl phenyl porphyrin bismuth-MOF material, reacting antimony nitrate with tetra (4-pyridyl) porphyrin and benzoic acid to prepare a pyridyl porphyrin antimony-MOF material, and performing sol-gel reaction on lanthanum isopropoxide and cerium isopropoxide to prepare lanthanum-cerium sol; the preparation method comprises the following steps: mixing calcium nitrate, magnesium chloride, organic acid, organic amine and hydrogen peroxide for reaction to prepare a calcium / magnesium organic matter, mixing the calcium / magnesium organic matter with other substances, adding the mixture into an acetonitrile / ethanol mixed solvent, and uniformly stirring and mixing to prepare the efficient environment-friendly petroleum passivator. The high-efficiency environment-friendly petroleum passivator prepared by the invention is green, safe, non-toxic and efficient, has better capturing and passivating effects on metal ions such as nickel and vanadium in the catalytic cracking reaction process of heavy oil, improves the activity of a catalyst, prolongs the service life of the catalyst, and thus, has a wide application prospect.

The invention provides a cobalt monatomic nano-enzyme system modified by phospholipid polyethylene glycol carboxyl. The cobalt monatomic nano-enzyme system comprises a cobalt monatomic nano-enzyme composite core and phospholipid polyethylene glycol carboxyl compounded on the surface of cobalt monatomic nano-enzyme, the cobalt monatomic nano-enzyme composite core comprises a cobalt monatomic nano-enzyme and ginsenoside loaded on the cobalt monatomic nano-enzyme. The invention also provides a bifidobacterium synergetic cobalt monatomic nano-enzyme system which is formed by combining cobalt monatomic nano-enzyme with ginsenoside Rb1 and further delivering the cobalt monatomic nano-enzyme and ginsenoside Rb1 through bifidobacterium bifidum for targeted therapy of enteritis. The combination of Co SA and Rb1 can enhance the anti-inflammatory efficacy by adjusting a key immune signal pathway, and bifidobacterium bifidum can ensure targeted delivery of microbiota and promote intestinal barrier repair. The synergistic three-component strategy integrating monatomic nano-enzyme antioxidation, natural drug immunoregulation and probiotic targeting is provided, and a promising treatment platform is provided for accurate intervention of IBD.