32 results about "In situ crystallization" patented technology

The application belongs to the field of scintillator material preparation, and particularly relates to a manganese-based pixelated scintillator array and a preparation method and application thereof. The (BuTPP)2MnBr4 scintillator material in a molten state is filled into a quartz glass cavity by capillary action, and a glass scintillator matrix is formed by cooling and quenching; then, in-situ crystallization is realized in the glass scintillator by using femtosecond laser direct writing processing, and a pixelated array is precisely constructed. The in-situ crystallization induced by the femtosecond laser significantly improves the photoluminescence intensity and the radiation luminescence intensity of the material, effectively solves the problems of low luminescence efficiency, high pixelation processing difficulty and poor crystallization controllability of the traditional glass scintillator, and the prepared pixelated scintillator array has stable optical performance and clear pixel boundary, is suitable for X-ray imaging, radiation detection and the like, and has simple preparation process and strong controllability of parameters, thereby providing a new implementation method for the preparation of arrayed X-ray scintillators.

This invention discloses an interlayer confined piezoelectric composite film of graphene oxide, its electric field-driven preparation method, and its application. The preparation method includes: preparing a graphene oxide dispersion using the Hummers method and filtering it to form a graphene oxide film; placing the graphene oxide film in an electric-driven device, introducing different precursor solutions on both sides of the film, and driving the precursor components to migrate into the interlayer confined space of the graphene oxide under the action of an applied electric field; under the synergistic effect of electric field driving and interlayer confinement, the precursors entering the interlayer react and crystallize in situ to form a piezoelectric functional phase. The prepared composite film can generate piezoelectric polarization under mechanical stimulation conditions and can be used for ion selective adsorption / separation, especially suitable for the selective adsorption / separation of uranium and vanadium ions in high-salt water systems. This invention achieves a synergistic improvement in interfacial charge regulation and ion selectivity regulation by constructing a piezoelectric functional phase in situ within the interlayer confined space of graphene oxide.

The present disclosure provides a thermal barrier coating powder and a preparation method thereof, and a thermal barrier coating, and relates to the technical field of high-temperature protective coating materials. The method comprises: performing mechanical-chemical grinding and surface hydroxylation treatment on a MAX phase powder; dispersing an activated MAX phase core in a liquid phase, uniformly coating a YSZ precursor on the surface of the core through double titration co-precipitation to obtain a core-shell structure precursor slurry; performing microwave hydrothermal treatment to in-situ crystallize the YSZ precursor to form a YSZ shell layer on the surface of the MAX phase core, thereby obtaining a core-shell structure unit; the core-shell structure unit has a core-shell structure composed of a MAX phase core and a YSZ shell; performing post-treatment and spray drying on the core-shell structure unit to obtain a thermal barrier coating powder; and the powder is obtained by agglomeration of multiple core-shell structure units. The interface between the core and the shell of the powder obtained by the method is firmly combined, can provide oxidation protection for the inner core of the MAX phase in coating preparation processes such as thermal spraying, and significantly improves the fracture toughness and thermal shock resistance of the thermal barrier coating.

The invention relates to the technical field of preparation of lead-free metal halide scintillator crystal powder, and particularly discloses chlorine zirconium cesium crystal powder for a composite scintillator and a confinement growth method of the chlorine zirconium cesium crystal powder. The cesium zirconium chloride crystal powder is cesium zirconium chloride-gas phase oxide composite powder formed on the micro-nano scale by means of in-situ crystallization, and the cesium zirconium chloride crystal powder is composed of 50-95.3 wt% of cesium zirconium chloride and 4.7-50 wt% of gas phase oxide. The preparation method comprises the following steps: preparing zirconium chloride-gas phase oxide powder, preparing a cesium chloride solution, mixing zirconium chloride-gas phase oxide slurry, and growing chlorine zirconium cesium crystal powder in an in-situ crystallization confinement range. The cesium zirconium chloride crystal powder prepared by the method has the advantages of adjustable particle size, stable suspension and efficient scintillation luminescence performance, solves the problem of crystal powder-polymer phase separation in a composite scintillator, and can be used for large-scale preparation of the composite scintillator in the field of radiation detection.

The invention relates to the technical field of photoelectric materials and devices, in particular to an in-situ crystallization-passivation integrated preparation method of a perovskite thin film, a perovskite solar cell and a preparation method of the perovskite solar cell. The method comprises the following steps: coating a perovskite precursor solution on a substrate to form a wet film; immediately purging by using a nitrogen knife to obtain an intermediate-state film; coating a passivation layer solution on the intermediate-state thin film; and finally, carrying out one-time thermal annealing, and synchronously completing final crystallization of perovskite and permeation passivation of the passivating agent in the annealing process. According to the method, the passivation step is preposed, and crystallization and passivation are cooperatively carried out through one-step annealing. According to the method, the process is simplified, the energy consumption is reduced, more importantly, the passivator can actively inhibit the formation of intrinsic defects in the crystal growth process, source passivation is realized, and the bulk phase and interface defect density of the perovskite thin film is remarkably reduced. The perovskite solar cell prepared by the method has higher photoelectric conversion efficiency and excellent stability.

This invention discloses a method and system for the harmless treatment and beryllium ultrastable mineralization of lithium slag through agent-slag synergy, belonging to the field of solid waste treatment technology. It includes: dissolving active silica-alumina excitation components according to mineral diagnostic data to obtain a structural excitation liquid; simultaneously activating the lithium slag and the excitation liquid through mechanochemical processes, reconstructing the interface of the adsorbed excitation components, and generating a modified lithium slag matrix; preparing a mineralization assembly liquid based on the beryllium exposure of the matrix; introducing the assembly liquid into the matrix in a segmented gradient, controlling the hydrogen ion concentration to induce in-situ crystallization at the interface, and obtaining a primary stabilizer; pressing the stabilizer and placing it in an alternating electromagnetic field coupled with an endogenous exothermic environment to generate beryllium ultrastable mineralization products. This invention employs a comprehensive treatment method combining deep mechanochemical simultaneous activation and exposure with slow-release ion in-situ crystallization and endogenous thermomagnetic coupling to drive ordered cross-linking of the microstructure. This method can destroy the dense inert framework of the waste slag and forcibly drive the migration and trapping of heavy metals, ultimately achieving deep ultrastable mineralization and seepage prevention of beryllium toxic ions.

The application belongs to the technical field of photoelectric functional film manufacturing, and particularly relates to a hierarchical pore host framework gas phase permeation-in-situ formation assembly method and an online acceptance method. The assembly method takes a two-dimensional covalent organic framework film with a first pore structure and a second pore structure as a host framework; a guest precursor is introduced by pulse gas phase permeation for in-situ crystallization in a low-temperature confined space; then, an interface passivation molecule is introduced by gas phase permeation to form a discontinuous passivation layer, and flash solidification is used to induce grain boundary fusion and form a continuous guest phase; subsequently, an upper contact structure for electrical measurement is formed, a bias-dependent external quantum efficiency and a dark state current-voltage curve are obtained, an effective carrier collection characteristic length and a reverse saturation current density are fitted, and process acceptance and correction instructions are generated accordingly. The application is suitable for closed-loop intelligent manufacturing of complex and hybrid films, and greatly improves the yield of mass production.

This invention relates to the field of water pollution purification, specifically to a process for purifying and recycling industrial wastewater. The process provided by this invention induces the in-situ crystallization and precipitation of calcium and magnesium ions, primarily in the form of aragonite-type calcium carbonate, by adding a crystal form regulator to the wastewater. This replaces the traditional precipitation method using precipitants, fundamentally preventing the generation of secondary sludge. Simultaneously, a quencher regulates the type and concentration of active free radicals within the system, achieving targeted degradation of organic matter while maximizing the retention of beneficial ions in the water, ensuring the corrosion inhibition performance of the recycled water. This invention features a simple operation, requires no mechanical structural modifications, and can be directly adapted to existing industrial water treatment systems. It effectively solves the problem of simultaneously addressing hardness removal and organic matter degradation in circulating water wastewater treatment, significantly improving the purification and recycling efficiency of wastewater. The treated effluent can be directly reused in industrial circulating water systems.

The application discloses a sodium ion specific crown ether-like double-ion channel porous organic cage separation membrane and a preparation method and application thereof. The separation membrane takes AAO as a substrate, strengthens intermolecular forces through intramolecular hydrogen bonds, and is prepared by interface reverse diffusion polymerization and in-situ crystallization growth of aldehyde monomers and flexible triamine monomers. The preparation process is mild, simple and universal, the prepared porous organic cage separation membrane has good crystallinity, a dense and defect-free membrane layer, and forms a low-energy-barrier crown ether-like double-ion channel, has specific recognition and transmission capacity for sodium ions, can realize high ion flux and high selectivity in cooperation, and has excellent performance in selective separation of sodium ions and other cations, and has a good application prospect in the fields of seawater desalination, salt lake resource extraction, industrial wastewater resource utilization and the like.

The invention relates to the technical field of energetic material preparation, in particular to a continuous flow production process of 1, 3, 5-triamino-2, 4, 6-trinitrobenzene. The process comprises the following steps: synthesizing 1, 3, 5-triethoxy-2, 4, 6-trinitrobenzene through a first-stage tubular reactor by taking a deep eutectic solvent prepared from choline chloride infrared ethylene glycol as a medium, and reacting with an amination reagent prepared from ammonium carbamate in a second-stage tubular reactor to obtain 1, 3, 5-triethoxy-2, 4, 6-trinitrobenzene. Subsequently, the production is completed through in-situ crystallization, inclined settling separation, water washing and alcohol washing drying and deep eutectic solvent recovery and regeneration. According to the process, continuous production of 1, 3, 5-triamino-2, 4, 6-trinitrobenzene is achieved, the product yield and purity stability are improved, the solvent cost is reduced through solvent recycling, waste liquid discharge is reduced, the problems that a traditional intermittent process is low in efficiency, large in pollution and poor in product consistency are solved, and the process is suitable for industrial large-scale preparation of 1, 3, 5-triamino-2, 4, 6-trinitrobenzene.

The invention belongs to the technical field of drug crystallization, and provides metformin hydrochloride and fenofibrate double-drug-loading particles and a preparation method thereof.The preparation method comprises the following steps that polysaccharide, a solvent I and metformin hydrochloride are mixed and heated, and a homogeneous solution is obtained; mixing the homogeneous solution, fenofibrate and triglyceride to obtain a suspension; a cross-linking agent, a solvent II and the suspension are mixed and placed in a crystallizer to be subjected to a crystallization reaction, and a crystallization solution is obtained; and carrying out solid-liquid separation on the crystallization liquid, washing, and drying to obtain the double-drug-loading particles. The obtained particles are in a solid state and have good stability compared with a micelle drug loading system, meanwhile, the operation unit is simplified by adopting an in-situ crystallization means in the carrier, operation such as mixing, grinding and spray drying is not needed, needed equipment is simple, operation is easy and convenient, and good technical economy and high application value are achieved.

The application discloses a mixed matrix membrane with high two-dimensional metal organic framework filling amount, which is prepared by in-situ crystallization and a spin coating method; and comprises the following steps: taking 1,3,5-benzene tricarboxylic acid, ZrCl4 and PEI as reactants, two-dimensional high polymer-metal organic framework composite nanosheets are formed by in-situ crystallization and cross-linking of two-dimensional metal organic frameworks in a polymer phase; the two-dimensional high polymer-metal organic framework composite nanosheets are deposited on a polymer substrate by a spin coating method, and a mixed matrix membrane with a film thickness of 40-120 nm and a two-dimensional high polymer-metal organic framework filling amount of 85 wt% is obtained after drying. The preparation method is simple. The prepared mixed matrix membrane has high two-dimensional metal organic framework filling amount, is used for CO2 / N2 system separation, and has high CO2 permeation rate and high CO2 / N2 selectivity. The mixed matrix membrane has good application prospect in carbon capture.

The invention discloses wound dressing containing Ectoine and a preparation method of the wound dressing, and belongs to the technical field of medical dressing preparation, the wound dressing containing Ectoine is prepared from the following components in parts by weight: HNTs (at) IPA, sodium alginate, oligomeric proanthocyanidins, N-isopropylacrylamide, acrylic acid, Ectoine and deionized water; wherein the HNTs (at) IPA is obtained by loading isopropyl alcohol on a halloysite nanotube. The halloysite nanotubes are used for loading isopropanol, in-situ crystallization and long-acting slow release of Ectoine are achieved, oligomeric proanthocyanidins are used for replacing traditional glutaraldehyde to serve as a cross-linking agent, the wound dressing with excellent mechanical properties is prepared, the tensile strength, toughness and biological safety of the dressing are remarkably improved, and the wound dressing is suitable for being used as a wound dressing. The method can be used for repairing complex wounds.

The invention discloses a crystal form A of acetyl L-carnitine hydrochloride, a preparation method of the crystal form A, and a bulk drug, a food additive, a feed additive and a composition containing the crystal form A. The crystal form A of the acetyl L-carnitine hydrochloride is good in solubility, high in stability, high in purity, regular in shape and suitable for being applied to bulk drugs, food additives and feed additives. The preparation method is simple in process, the crystal form A can be obtained at high yield through in-situ crystallization of a reaction solution and dispersion of ethanol, and the preparation method is suitable for large-scale industrial production.

The application discloses a method for recycling a polyester-containing product depolymerization product. The method is to heat the enzymatic hydrolysis liquid containing a dibasic ammonium salt and a dihydric alcohol, promote thermal decomposition of the dibasic ammonium salt, and directly recycle the ammonia separated out into reusable ammonia water through a condensing system. Meanwhile, the dibasic acid is crystallized in situ by using the characteristics that the solubility of the dibasic acid sharply decreases under specific conditions, and high-efficiency separation of the dibasic acid and the dihydric alcohol is realized through subsequent solid-liquid separation, so that technical bottlenecks such as acid and alkali consumption, salt-containing wastewater generation and low dihydric alcohol recovery rate in the traditional sodium salt process are fundamentally avoided.

The invention relates to the technical field of anti-counterfeit labels, in particular to an anti-counterfeit label based on a laser-induced perovskite quantum dot microarray and a preparation method of the anti-counterfeit label. According to the technical scheme, the perovskite quantum dot micro-array solar cell comprises a substrate, a perovskite quantum dot micro-array, a composite micro-nano structure, a flexible transition layer and an ultrathin protective layer, the flexible transition layer covers the surface of the perovskite quantum dot microarray, the ultrathin protection layer covers the surface of the flexible transition layer, and a perovskite quantum dot precursor residual curing layer is arranged between the perovskite quantum dot microarray and the substrate; the perovskite quantum dot microarray is of a submicron structure, perovskite quantum dot precursor in-situ crystals are prepared on the substrate, and the perovskite quantum dot microarray is composed of perovskite quantum dot partitions with different components. According to the invention, the preparation of the submicron high-precision perovskite quantum dot anti-counterfeit label is realized, and the anti-counterfeit label has the characteristics of multi-dimensional collaborative anti-counterfeit, irreversible environment response, degradability, flexible adaptation and the like.

This application relates to the field of nanophotocatalytic materials technology, and discloses a conjugated polyelectrolyte / mesoporous nano-titanium dioxide composite photocatalyst, its preparation method, and its application. The preparation method includes: dissolving Pluronic F127 in tetrahydrofuran to obtain a homogeneous solution; adding glacial acetic acid and hydrochloric acid to the solution and stirring until homogeneous to obtain a precursor solution; rapidly adding tetrabutyl titanate to the precursor solution and stirring until homogeneous; then removing the solvent and crystallizing in situ; collecting the solid phase and calcining it to obtain mesoporous titanium dioxide; dispersing the conjugated polyelectrolyte (CPEs) in a solvent, then adding the mesoporous titanium dioxide for self-assembly, removing the solvent, and obtaining the composite photocatalyst. The composite photocatalyst prepared in this application exhibits a wider visible light response range and superior photocatalytic water splitting for hydrogen production. It can fully utilize the photosensitization and charge transport advantages of CPEs under extremely low loading conditions, achieving excellent photocatalytic hydrogen production performance without the need for noble metal co-catalysts.

The application belongs to the technical field of medicine, and particularly relates to a ceftriaxone sodium powder injection and a preparation method thereof. The water-soluble vitamin E and L-cysteine are used to synergistically play the roles of antioxidation and anti-aggregation, and effectively inhibit the polymer generation and the aggregation phenomenon in the crystallization process. The mesoporous silica modified by chitosan is used as a drug carrier, the ordered drug is promoted to enter the mesoporous channel through the positive charge mediation, the efficient loading of the drug is realized, and the biocompatibility is improved. The supercritical anti-solvent crystallization technology is used, the drug is in-situ crystallized in the mesoporous channel to form a highly dispersed state, the specific surface area of the drug is significantly increased, and the ultrafast dissolution is realized. The ceftriaxone sodium powder injection prepared by the application has the excellent characteristics of fast dissolution speed, uniform particle size, no aggregation, good stability, high safety, and high drug loading efficiency.

The present technology provides a method of making a fluid catalytic cracking (FCC) catalyst, the method includes: in situ crystallizing Y-zeolite on a precursor microsphere to provide the FCC catalyst, wherein the in situ crystallizing includes: mixing the precursor microspheres with sodium silicate, a zeolite initiator (seeding zeolite crystals), and water to form an alkaline slurry; and heating the alkaline slurry to a temperature of about 38° C. (100° F.) to about 93° C. (200° F.) to obtain a zeolitic microsphere material; and wherein the FCC catalyst has a zeolite content of less than or equal to about 30 weight percent (wt. %). The unit cell size of the zeolite Y is 24.60 to 24.70 angstrom.

The invention belongs to the technical field of medicines, and particularly relates to a ceftriaxone sodium powder injection and a preparation method thereof. According to the invention, the water-soluble vitamin E and the L-cysteine are used for synergistically exerting anti-oxidation and anti-agglomeration effects, so that the agglomeration phenomenon in the polymer generation and crystallization process is effectively inhibited; chitosan modified mesoporous silica is adopted as a drug carrier, and drugs are promoted to orderly enter mesoporous channels through positive charge mediation, so that efficient loading of the drugs is realized, and biocompatibility is improved; by utilizing a supercritical anti-solvent crystallization technology, the drug is crystallized in situ in a mesoporous channel to form a highly dispersed state, and the specific surface area of the drug is obviously increased, so that the ultra-fast dissolution is realized; the ceftriaxone sodium powder injection prepared by the invention has the excellent characteristics of high dissolution speed, uniform particle size, no agglomeration, good stability, high safety and high drug loading efficiency.

This invention discloses an interface-enhanced PVA / MOF composite gel electrolyte, its preparation method, and an aqueous zinc battery. The preparation method is based on the Hofmeister effect, employing salt ion induction to achieve in-situ crosslinking of PVA and in-situ crystallization of UiO-66-NH2, constructing a strong molecular-level bonding interface between PVA and MOF. This effectively solves the technical bottlenecks of poor interfacial compatibility and poor MOF dispersion in traditional composite electrolytes, and significantly optimizes Zn. 2+ The transport and deposition kinetics of zinc anodes were investigated. The prepared electrolyte not only effectively suppressed side reactions such as dendrite growth, hydrogen evolution, and corrosion in zinc anodes, significantly improving the cycle stability of zinc anodes, but also featured a mild and highly controllable preparation process with no high-temperature side reactions. When applied to aqueous zinc batteries, the cycle life of the batteries was significantly improved, demonstrating promising prospects for large-scale production and industrial application.

The present disclosure provides a thermal barrier coating powder and a preparation method thereof, and a thermal barrier coating, and relates to the technical field of high-temperature protective coating materials. The method comprises: performing mechanical-chemical grinding and surface hydroxylation treatment on a MAX phase powder; dispersing an activated MAX phase core in a liquid phase, uniformly coating a YSZ precursor on the surface of the core through double titration co-precipitation to obtain a core-shell structure precursor slurry; performing microwave hydrothermal treatment to in-situ crystallize the YSZ precursor to form a YSZ shell layer on the surface of the MAX phase core, thereby obtaining a core-shell structure unit; the core-shell structure unit has a core-shell structure composed of a MAX phase core and a YSZ shell; performing post-treatment and spray drying on the core-shell structure unit to obtain a thermal barrier coating powder; and the powder is obtained by agglomeration of multiple core-shell structure units. The interface between the core and the shell of the powder obtained by the method is firmly combined, can provide oxidation protection for the inner core of the MAX phase in coating preparation processes such as thermal spraying, and significantly improves the fracture toughness and thermal shock resistance of the thermal barrier coating.

The invention relates to the technical field of energetic materials, in particular to a composite energetic material with molecular perovskite DAP-4 growing on the surface of MXene in situ and a preparation method and application thereof.The preparation method includes the steps that triethylene diamine and ammonium perchlorate are sequentially added into MXene suspension liquid, and stirring is conducted to obtain an MXene precursor solution; and dropwise adding an HClO4 solution while stirring to obtain DAP-4-coated MXene composite particles, continuously stirring, carrying out suction filtration, washing, and drying to obtain the composite energetic material. By adopting the steps, DAP-4 crystals are crystallized and grown on the surface of the MXene sheet layer in situ, so that the laser energy absorption and heat conduction efficiency of the material can be improved, and the photothermal conversion efficiency of DAP-4 is remarkably improved, thereby effectively reducing the laser ignition threshold and shortening the ignition delay time. Meanwhile, the MXene can also enable the material to show higher energy release efficiency in the combustion process.

The invention relates to the technical field of all-solid-state lithium batteries, in particular to a composite electrolyte, a preparation method thereof and an all-solid-state lithium battery. The composite electrolyte comprises BTO-LATP particles and a lithium ion conductor gradient interface layer located at the grain boundary of the BTO-LATP particles, wherein the BTO-LATP particles are arranged on the lithium ion conductor gradient interface layer; the BTO-atLATP particle comprises an LATP inner core and a nano barium titanate shell layer which is grown on the surface of the LATP inner core in an in-situ crystallization manner. Through collaborative design of core-shell structure construction and a grain boundary gradient interface layer, the composite electrolyte has excellent interface chemical stability, excellent interface physical stability and high ionic conductivity.

This invention relates to the field of pharmaceutical formulation technology, and discloses a rebamipide tablet formulation and its preparation process. The formulation, by weight, mainly comprises 100 parts rebamipide, 5 to 15 parts L-arginine, 2 to 8 parts poloxamer 188, 10 to 20 parts hydroxypropyl cellulose, and excipients such as low-substituted hydroxypropyl cellulose and microcrystalline cellulose. The preparation process includes: preparing a composite binder solution containing L-arginine, poloxamer 188, and hydroxypropyl cellulose at 10°C to 15°C; adding rebamipide and cold-curing to obtain a suspension; subsequently, during fluidized bed granulation, by adjusting the absolute humidity and temperature of the inlet air in stages, sequentially performing high-humidity delayed drying and spreading followed by dehumidification and temperature-increasing curing. This invention prevents hydrophobic drug agglomeration and nozzle clogging through low-temperature processing; the in-situ crystallization of L-arginine creates a weakly alkaline microenvironment, significantly improving the drug dissolution rate in acidic media; and achieving high granulation yield and batch-to-batch uniformity of content.

The invention provides low-water-absorption Zn-MOFs, a low-water-absorption Zn-MOFs composite molding body and a preparation method and application of the low-water-absorption Zn-MOFs composite molding body, and relates to the technical field of adsorption materials. Hydrophobic and nitrogen-rich organic ligands serve as a connecting agent of MOFs, and hydrophobic and carbon-philic columnar layered Zn-MOFs are obtained by changing synthesis conditions; an in-situ crystallization self-assembly technology is adopted, a precursor solution of MOFs is soaked in a macroporous polymer carrier, a solvothermal reaction is carried out, Zn-MOFs crystals grow in macropores of the carrier in situ, and a Zn-MOFs composite forming body is obtained. The preparation process disclosed by the invention has the remarkable advantages of simplicity and convenience in operation, strong parameter controllability, low raw material cost, stable supply, controllable safety risk and the like, is suitable for industrial amplified production, and solves the technical problems of water competitive adsorption and accumulation effect reduction of the MOFs adsorption material.

This application relates to the field of sludge treatment technology, and discloses a sludge dewatering agent and a sludge dewatering method. The dewatering agent consists of reagent A (sodium percarbonate and tetraacetylethylenediamine powder), reagent B (magnesium sulfate solution), reagent C (polyferric sulfate solution), and reagent D (cationic polyacrylamide solution), which are packaged independently. The dewatering method involves adding the above reagents in sequence: first, reagent A is used to oxidize and break down the extracellular polymers of the sludge, releasing endogenous phosphorus and nitrogen and providing a slightly alkaline environment; then, reagent B is added, causing it to crystallize in situ with phosphorus and nitrogen in the liquid phase to form a rigid magnesium ammonium phosphate framework, improving the sludge permeability; next, reagent C is added to neutralize the alkalinity of the system and trap residual microcrystals and free phosphorus; finally, reagent D promotes floc formation, followed by filter press dewatering. This invention reduces the amount of external dewatering additives and the moisture content of the sludge cake, realizes the conversion and utilization of endogenous phosphorus and nitrogen in the sludge, and avoids secondary pollution caused by phosphorus enrichment in the effluent.

This invention discloses a method for multi-stage treatment of copper-containing wastewater based on graphene oxide-assisted electric field-driven process. The method utilizes a graphene oxide-assisted N / O / S multi-coordinated copper ion-imprinted cation exchange membrane as the selective separation interface, employs a membrane arrangement of graphene oxide-assisted copper ion-imprinted cation exchange membrane—anion exchange membrane—cation exchange membrane, and utilizes an electric field for migration and release, with endogenous carbonate as the circulating crystallization medium in a continuous treatment system. This system can synergistically achieve the decomposition and transformation of complexed copper, and the treatment of Cu... 2+ Selective migration and enrichment, polarity reversal release, and in-situ crystallization recovery form "complex copper transformation-Cu". 2+ A closed-loop treatment pathway of "selective enrichment at the membrane interface – reverse release – internal carbonate recycling and crystallization recovery" is employed. This technology can reduce the consumption of external precipitants, lower the post-treatment pressure of copper-containing concentrate, and increase the value of copper resource recovery, providing strong support for the in-depth treatment and resource utilization of wastewater containing complexed copper.

The invention discloses a composite anion exchange membrane and a preparation method thereof. The membrane comprises a porous substrate and a covalent organic framework functional layer which grows in situ and is bonded on the porous substrate, the functional layer is provided with an ordered skeleton formed by periodically connecting aromatic units through dynamic covalent bonds, and a quaternary ammonium salt type anion exchange group is grafted on the skeleton. The preparation method mainly comprises the steps of performing in-situ polycondensation on a porous substrate to form a precursor, performing in-situ crystallization to construct an ordered skeleton, performing in-situ reduction to enhance stability, performing in-situ quaternization to graft functional groups and the like. According to the invention, through compounding of the porous substrate and the rigid ordered COF skeleton, high mechanical strength and low swelling characteristics are ingeniously combined with high ionic conductivity brought by regular pore channels and grafting groups, and the technical bottleneck that mechanical properties and electrochemical properties of a traditional anion exchange membrane are difficult to consider at the same time is successfully solved. The obtained membrane material shows excellent performance in water electrolysis application, and has a wide application prospect in the field of anion exchange membrane water electrolysis hydrogen production.

The application discloses a kind of green recovery and regeneration method of waste battery electrode material, belong to waste battery processing technical field, it includes the micro area ultrasonic scanning data of obtaining waste electrode sheet, laser-induced breakdown spectroscopy data and electrochemical impedance spectroscopy data and carries out feature fusion, generates dynamic activation indicator mapping and generates multi-field coupling driving sequence, act on waste electrode sheet under preset condition carries out multi-field coupling stripping, with ionic liquid is mixed and is handled and is applied pulsating flow field and is strengthened and is separated, output pure active material cluster is placed in plasma gas and carries out in situ crystallization repair, generates regenerated electrode material and carries out bonding and aqueous conductive agent compounding, form re-electrode polarization layer body, and carry out cycle and rate response test, obtain reutilization performance evaluation atlas. Through multi-dimensional perception guided multi-field coupling intelligent stripping and plasma in situ repair, waste electrode active material can be realized to lossless efficient recovery and high-performance regeneration.