46 results about "In situ crystallization" patented technology

The invention provides a high-stability in-situ crystallization catalyst as well as a preparation method and application thereof, and belongs to the technical field of oil refining catalysts. The preparation method comprises the following steps: firstly preparing kaolin microspheres, then roasting the kaolin microspheres into high soil balls and partial soil balls, and mixing the high soil balls and partial soil balls with a silicon source, sodium hydroxide, a seed crystal and a silicon-aluminum activator for in-situ crystallization, so that not only is the activation degree of silicon dioxide in kaolin promoted, but also the timely insertion of active silicon species into a NaY zeolite skeleton in the crystallization process is accelerated, and the activity of the NaY zeolite is improved. The high-stability in-situ crystallization catalyst is prepared by carrying out ammonium salt and rare earth exchange, roasting and phosphorus or boron modification treatment on the crystallized microspheres, and has the characteristics of strong heavy oil conversion and metal pollution resistance and high total liquid yield when being used for catalyzing heavy oil cracking.

The invention discloses a tungsten trioxide electrochromic film for multi-tungsten oxygen cluster induced in-situ crystallization as well as a preparation method and application of the tungsten trioxide electrochromic film. The preparation method comprises the following steps: S1, adding hydrochloric acid into a sodium tungstate dihydrate aqueous solution to obtain a precipitate; washing the precipitate until the pH value of the supernate is greater than 3, and then drying the precipitate to obtain hydrated tungstic acid powder; dissolving the hydrated tungstic acid powder in a hydrogen peroxide solution to obtain a peroxy tungstic acid solution; s2, heating, evaporating and concentrating the peroxy tungstic acid solution to obtain a precursor solution containing multi-tungsten-oxygen clusters; and transferring the precursor solution containing the multi-tungsten-oxygen cluster to a substrate by adopting a film coating process, and annealing to obtain the tungsten trioxide electrochromic film with multi-tungsten-oxygen cluster induced in-situ crystallization, a matrix of the tungsten trioxide electrochromic film for multi-tungsten-oxygen cluster induced in-situ crystallization is amorphous tungsten trioxide, and hexagonal-phase tungsten trioxide nanocrystals are dispersed and distributed in the amorphous tungsten trioxide.

The invention provides a high-activity in-situ crystallization catalyst as well as a preparation method and application thereof, and belongs to the technical field of oil refining catalysts. The preparation method comprises the following steps: firstly, carrying out alkali treatment on kaolin, then mixing with kaolin to obtain modified kaolin microspheres, roasting, and then carrying out in-situ crystallization on the modified kaolin microspheres, a silicon source, sodium hydroxide, a seed crystal and a silicon-aluminum activator, so that the activation degree of silicon dioxide in kaolin is promoted, and meanwhile, timely insertion of active silicon species into a NaY zeolite skeleton in the crystallization process is accelerated; the high-activity in-situ crystallization catalyst is prepared by carrying out ammonium salt and rare earth exchange, roasting and phosphorus or boron modification treatment on the crystallized microspheres, and has the characteristics of strong heavy oil conversion and metal pollution resistance and high total liquid yield when catalyzing heavy oil cracking.

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 present invention discloses a serial crystallography experimental device based on conveyor belt technology. The device comprises a goniometer head, a base film, and a crystallization plate storage tray. The bottom end of the goniometer head is provided with a goniometer head groove for coupling with the goniometer head base on a synchrotron beamline station. The top end of the goniometer head is provided with two goniometer head support rods for coupling with bearing short rods, and a goniometer head waste liquid tank for collecting waste liquid after X-ray irradiation. The base film is coupled to the crystallization plate storage tray for supporting and flipping the crystallization plate storage tray. During the experiment, the crystallization plate storage tray, equipped with a sitting drop in situ crystallization plate, is coupled to the base film. The low background scattering film on the back of the sitting drop in situ crystallization plate is connected to the bearing short rod via an adhesive film to form a conveyor belt film. Driven by a motor, the bearing short rod tears off the conveyor belt film during sample delivery to the goniometer head and performs diffraction data acquisition. Waste sample droplets are squeezed out and flow down the goniometer head support rods into the waste liquid tank.

Disclosed herein is a fluid catalyst cracking (FCC) catalyst component including an in-situ crystallized zeolite on pure alumina particles, wherein the FCC catalyst component has a ratio of zeolite surface area (ZSA) to matrix surface area (MSA) of less than about 1.3. Also disclosed herein FCC catalyst compositions that include said FCC catalyst components, methods of preparing the FCC catalyst composition, methods of preparing the FCC catalyst component, and methods of using the FCC catalyst composition or the FCC catalyst component.

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 invention provides a fluorine-containing wastewater treatment method based on an in-situ crystallization method, which comprises the following steps: introducing fluorine-containing wastewater into a reaction column, and judging whether the fluorine ion concentration of liquid in the reaction column is greater than a preset first concentration or not; if yes, introducing the solution A into the reaction column, continuously detecting the fluorinion concentration of the liquid in the reaction column, discharging the liquid in the reaction column when the fluorinion concentration of the liquid in the reaction column is smaller than a preset first concentration, and discharging the liquid in the reaction column when the fluorinion concentration of the liquid in the reaction column is increased from smaller than the preset first concentration to larger than the preset first concentration; transferring liquid in the reaction column into an adsorption column; continuously detecting the fluorine ion concentration of the liquid in the adsorption column, discharging the liquid in the adsorption column when the fluorine ion concentration of the liquid in the reaction column is smaller than a preset second concentration, and stopping introducing the fluorine-containing wastewater and adding the solution B into the reaction column and the adsorption column when the fluorine ion concentration of the liquid in the adsorption column is higher than the preset second concentration. Therefore, the fluorine ion concentration of the effluent is effectively reduced.

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 method for preparing a spherical ethanol adsorption material for tail gas treatment through amplification at normal temperature and pressure, which comprises the following steps: by taking an organic amine grafted and modified porous polyacrylate PAA-TEPA microsphere as a carrier, dipping the PAA-TEPA microsphere in an MIL-100 (Fe) precursor solution, carrying out in-situ crystallization growth of MIL-100 (Fe) on the inner surfaces of the PAA-TEPA microspheres at normal temperature and normal pressure under the action of peroxy free radicals to obtain a spherical composite material MIL-100 (Fe) coated PAA-TEPA; in-situ crystallization growth of MIL-100 (Fe) adopts a one-step dipping mode, PAA-TEPA microspheres are soaked in an MIL-100 (Fe) precursor solution containing a metal iron salt, an organic ligand and a peroxy free radical generating substance, and a reaction is carried out under the conditions of normal temperature, normal pressure and low-speed stirring. According to the amplification preparation method, kilogram-level products can be stably prepared, the microstructure of the spherical composite material can be improved, the adsorption performance on ethanol can be improved, and compared with a laboratory preparation method, the operation steps are simplified, the reaction time is shortened, so that the production cost is remarkably reduced, the safety production coefficient is provided, and the amplification preparation method has wide application prospects.

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 invention discloses comprehensive membrane sludge treatment equipment and a sludge treatment method for recycling and energy regeneration of sludge, an anaerobic dynamic membrane bioreactor is combined with an electrochemical membrane filtration phosphorus in-situ crystallization device, sludge and sludge liquid are treated and recycled by means of a membrane separation technology, biogas generated by digestion is collected, and the biogas is recycled and recycled. The membrane effluent is subjected to phosphorus resource recovery and carbon source reutilization, so that recycling and energy regeneration of sludge are realized, the polarity of the first electrode is controlled to be positive, the polarity of the second electrode is controlled to be negative, so that crystal precipitates are generated in the cathode membrane and nearby the cathode membrane, and part of the crystal precipitates enter a crystal precipitation region under the action of gravity; and controlling the polarities of the first electrode and the second electrode to reverse for 1-5 minutes every 6-8 hours, so that crystal precipitates attached to the cathode film fall off and enter a crystal precipitation area, and the cathode film is automatically cleaned in situ.

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 provides a method for recovering lithium salt from lithium-containing gypsum slag and synchronously detoxifying, which comprises the following steps: (1) mixing the lithium-containing gypsum slag and a salt solution, carrying out stirring slurrying reaction, and converting calcium sulfate dihydrate in the lithium-containing gypsum slag into calcium sulfate hemihydrate and / or anhydrous calcium sulfate in the stirring slurrying reaction to obtain a reaction material; the salt solution in the step (1) comprises a sulfate solution and / or a chlorate solution; and (2) carrying out solid-liquid separation on the reaction material in the step (1) to obtain a lithium-containing liquid phase and lithium-removed gypsum slag. According to the method, the salt solution is added to perform crystal form conversion on the calcium sulfate dihydrate, so that lithium and impurity elements originally in the surface, the grain boundary and the lattice defect of the dihydrate gypsum are released, the converted crystal form is crystallized in situ, the preparation of the lithium-containing liquid phase and the detoxification of the lithium-containing gypsum slag are synchronously realized, and the method is convenient to operate, short in process and wide in application prospect.

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.

Disclosed herein is a fluid catalytic cracking catalyst comprising an in-situ crystallized zeolite material and a matrix material. In at least one embodiment, the deactivated catalyst has a ratio of zeolite surface area to matrix surface area (Z / M) of less than about 1, and a unit cell size of at least about 24.3 Å.

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 discloses a perovskite nanocrystal array and a manufacturing method and application thereof, and belongs to the technical field of nano functional materials. The perovskite nanocrystal array provided by the invention is provided with the cross-linked polymer nanorod array; a plurality of perovskite nanocrystals are armored in each cross-linkable polymer nanorod; the perovskite nanocrystal is formed by carrying out swelling-deswelling induced in-situ crystallization on a perovskite precursor. According to the method, the cross-linked polymer nano-column arrays are arranged, and the perovskite nano-crystals are armored in each cross-linked polymer nano-column array in situ through a swelling-deswelling mechanism, so that large-scale manufacturing of the perovskite nano-crystal array with nanoscale precision can be effectively achieved; and the formed perovskite nanocrystal can be endowed with excellent environmental stability and surface optical performance, so that the perovskite nanocrystal array has high-quality metasurface optical performance.