296 results about "Nanoflower" patented technology

The invention discloses a nano flower-shaped covalent organic framework material as well as a preparation method, a device and application thereof, and belongs to the field of water treatment. An amino compound and an aldehyde group compound form a covalent organic framework structure with a specific flower-shaped structure under the action of a catalyst and a regulating agent, the covalent organic framework structure continues to react with a carboxyl compound, then metal is loaded, and the nano flower-shaped covalent organic framework material is obtained. Carboxyl in the carboxyl compound responds to uranium in water and does not respond to other metal ions, other interference ions are eliminated, in addition, the carboxyl compound further has sulfydryl which can fix subsequently-loaded metal ions, the loading capacity of the metal ions is improved, and the metal ions can be loaded on the surface of the metal ions in the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface. When the nano flower-shaped covalent organic framework material prepared by the method is used for treating water, uranium ions can quickly reach adsorption sites, and the material as an adsorbent is higher in stability and higher in adsorption selectivity.

The invention discloses a preparation method of a metal doped type hydroxyapatite nanoflower. The method specifically comprises the following steps: dispersing a calcium source and soluble metal salt into water, adding acid phosphate, urea and L-histidine, uniformly mixing, carrying out a hydrothermal reaction, mechanically stirring, filtering, washing, and drying a hydrothermal system precipitate to obtain the corresponding metal-doped hydroxyapatite nanoflower. Compared with the prior art, the metal-doped hydroxyapatite nanoflower prepared by the preparation method disclosed by the invention is directly assembled by nanosheets, and a single metal type can be doped in a customized manner. According to the method, water is used as a unique solvent, the use of an organic solvent is avoided, the pH does not need to be adjusted in advance, the technological process is simple, operation is convenient, equipment investment is small, and the method is suitable for industrial production.

The invention discloses a double-morphology boron-containing Zn / Cu metal organic framework composite material as well as preparation and application thereof, and belongs to the technical field of fine chemical engineering. The double-morphology boron-containing Zn / Cu metal organic framework composite material is prepared through a one-pot hydrothermal reaction, and the double morphology comprises a three-dimensional nanoflower structure and a three-dimensional rod / columnar structure. Specifically, by adjusting the molar ratio of Zn to Cu in the coordination process with corresponding ligands, when the molar ratio of Zn to Cu reaches 1: 1, the original single nanoflower structure can generate a new three-dimensional rod / columnar structure, so that two composite forms are formed. The double-morphology boron-containing Zn / Cu metal organic framework composite material shows high activity and high selectivity when being used for two key reactions of electrochemical hydrogenation reduction and electrochemical oxidation of furfural.

The invention discloses a Pt-based composite nanoparticle catalyst as well as a preparation method and application thereof, the catalyst comprises a V5O12 carrier and Pt nanoparticles loaded on the carrier, and the V5O12 is of a multi-stage layered nanoflower structure; the catalyst is obtained by in-situ generation of Pt nanoparticles on a V5O12 carrier. According to the catalyst disclosed by the invention, the superfine Pt nano-particles are loaded on the metal oxide V5O12, so that the activity and the stability of the catalyst are improved; in addition, the preparation method is simple to operate and low in cost, and large-scale production can be realized.

The invention discloses a biological patch material with dry-state adhesion and wet-state easy stripping characteristics and application thereof, and belongs to the field of biological medicine. The biological patch material is prepared according to the following steps: by taking water-soluble protein as a template and copper ions in water-soluble copper salt as a metal coordination center, carrying out self-assembly on the template and drug molecules with phenolic hydroxyl structures to form nanoflowers; mixing the acrylamide, the sodium alginate, the water-soluble calcium salt and the nano-flowers to obtain the water-soluble calcium-based water-soluble nano-flower fertilizer. The biological patch material is adhered to the skin through electrostatic interaction, covalent bonds, physical interpenetration and topological tissues. The patch has skin adhesion in a dry state, so that the patch is convenient to fix; after the patch is in contact with burnt skin, the patch absorbs water and swells, the adhesive force is obviously reduced, and painless, easy and non-invasive stripping is realized. In addition, the patch has immunoregulation performance, can prevent stimulation and anaphylaxis caused by long-term contact with the skin, and promotes burn repair.

The invention relates to the technical field of gas sensors for detecting H2S at room temperature, in particular to a preparation method of a high-sensitivity MoSe2-based gas sensitive material for detecting H2S at room temperature. The high-sensitivity MoSe2-based gas sensitive material for detecting H2S at room temperature is prepared by synthesizing MoSe2 nanoflowers by adopting a hydrothermal method and uniformly loading In2O3 nanoparticles on the surfaces of the MoSe2 nanoflowers by adopting a mechanical mixing method. The preparation method is simple and convenient in process and low in cost, the MoSe2 / In2O3 composite material prepared by the method has a relatively high specific surface area, and an II-type p-n heterojunction interface formed by the composite material effectively promotes separation and migration of current carriers. The response to 0.05 ppm H2S, 0.1 ppm H2S, 0.25 ppm H2S, 0.5 ppm H2S and 1ppm H2S at room temperature (the gas response is calculated according to the formula R = (Rg-Ra) / Ra) is 1.37, 1.47, 1.85, 2.74 and 4.82 respectively, the response is far better than that of an existing pure-phase MoSe2 gas sensitive material, and the working temperature is lower than that of an In2O3 pure-phase material. The research provides an effective method for constructing a gas sensitive material with a large specific surface area and II type p-n heterojunction, and further promotes the development of a gas sensitive technology.

The invention provides a preparation method of alpha, omega-diiodo perfluoroalkane, and belongs to the technical field of iodo perfluoroalkane synthesis. The preparation method disclosed by the invention comprises the following steps: under a protective atmosphere, enabling a nano flower type magnesium fluoride catalyst, 1, 2-diiodo tetrafluoroethane and tetrafluoroethylene to react, so as to obtain 1, 4-diiodo perfluorobutane and 1, 6-diiodo perfluorohexane. The nano flower type magnesium fluoride catalyst has high specific surface area and abundant coordination unsaturated sites, can effectively activate reactant molecule bonding sites, and avoids the problems of side reaction and catalyst deactivation caused by free radical paths; by optimizing the pore structure and reaction conditions of the catalyst, efficient synergistic conversion of IPF-2 and TFE can be realized, and the selectivity and yield of IPF-4 and IPF-6 are remarkably improved. The method provided by the invention has the advantages of mild conditions, safe operation, adjustable product distribution and the like, and meets the requirements of industrial production on high-selectivity fluorine-containing bifunctional compounds.

The invention belongs to the technical field of biological analysis and detection, and particularly relates to a photoelectrochemical-colorimetric dual-mode biosensor and application thereof in miRNA detection. According to the biosensor prepared by the invention, the bifunctional CuO-Cu2O nanoflower and the three-dimensional network g-C3N4 / AuNPs electrode are integrated, and an enzyme-assisted strand displacement signal amplification mechanism is combined, so that dual-mode collaborative detection of a target miRNA-21 is realized: in a photoelectrochemical mode, the detection limit reaches 0.35 fM (the linear range is 1 fM to 10 fM), and response is performed based on photocurrent polarity reversal; the colorimetric mode is as follows: the detection limit is 3.9 fM (the linear range is 10 fM to 10 nM), and TMB (Tetramethylbenzidine) color development visualization analysis is carried out. Single-mode interference is effectively eliminated through double-signal independent output and cross validation, and the method is suitable for high-reliability detection of trace miRNA (such as a breast cancer marker miRNA-21) in complex samples such as serum. According to the invention, the defects of insufficient sensitivity (pM level), poor anti-interference performance and high platform complexity in the prior art are overcome, and an efficient tool is provided for early diagnosis of cancers.

The invention discloses a preparation method of a cobalt-doped titanium dioxide three-dimensional nano flower-shaped hierarchical structure photoelectrode rich in oxygen vacancies and application of the cobalt-doped titanium dioxide three-dimensional nano flower-shaped hierarchical structure photoelectrode in the field of photoelectrocatalysis. The electrode is suitable for innocent treatment of nitrate-containing high-salinity wastewater. According to the preparation method, a cobalt-doped defect-state titanium dioxide photoelectrode is prepared by utilizing a hydrothermal method and a cation exchange method, a three-dimensional nanoflower hierarchical structure is presented, cobalt-oxygen vacancy double active sites are constructed, and low-concentration nitrate can be efficiently and highly selectively removed to nitrogen through photoelectrocatalysis. The method has the prominent characteristics that the method is applicable to a wide pH value range, and the nitrate wastewater has good adaptability and operation stability. The corresponding preparation method is simple to operate, and a reliable and highly feasible solution is provided for solving the problem of nitrate-containing wastewater treatment.

The present invention discloses a potassium-sodium co-doped manganese dioxide nanomaterial and its preparation and application. The present invention comprises the steps of dissolving silicate and manganese salt and mixing them to prepare a precursor; and treating the precursor by alkali etching. The potassium ions and sodium ions pre-embedded between the manganese dioxide layers stabilize the layered structure of the crystal, widen the interlayer spacing, and make the embedding and extraction of zinc ions and hydrogen ions smoother through electrostatic shielding. At the same time, the prepared potassium-sodium co-doped manganese dioxide nanomaterial has a unique nano-flower sheet structure, which increases the contact area of ​​the reaction. The electrochemical test results show that the potassium-sodium co-doped manganese dioxide nanomaterial has a good reversible specific capacity as a positive electrode material for zinc ion batteries. At a current density of 0.5 A / g, the high specific capacity can reach up to 239.1 mAh / g after 600 cycles.

A method for exfoliating three-dimensional nanomaterials based on carbon nanotube growth is disclosed. A catalyst is loaded onto the surface of a three-dimensional nanomaterial composed of two-dimensional nanosheets. Energy, a carbon source, H2, and Ar are provided to the three-dimensional nanomaterial in a reactor to exfoliate the two-dimensional nanosheets by growing CNTs. The three-dimensional nanomaterial is composed of at least one combination of two-dimensional nanosheets, including nanoflowers and nanolayers. The two-dimensional nanosheets include at least one of alumina, silicon oxide, and magnesium oxide. The three-dimensional nanomaterial is obtained through hydrothermal or solvothermal chemical reactions. The energy is provided by indirect heating of the substrate, which is achieved by directly heating the reactor through thermal radiation or convection to generate heat in the substrate. This invention solves the problem of the difficulty in exfoliating three-dimensional nanomaterials.

The invention provides a sodium ion battery and a preparation method of the sodium ion battery, and relates to the technical field of batteries. The preparation method of the negative electrode material of the sodium ion battery comprises the following steps: treating titanium-containing blast furnace slag to obtain metatitanic acid; metatitanic acid is treated, titanate is obtained, and the titanate has the nanoflower morphology; titanate is treated to obtain titanium dioxide, and the titanium dioxide has a nanoflower morphology and has oxygen vacancies. According to the negative electrode material prepared by the preparation method of the scheme, the migration rate of sodium ions can be improved, the specific capacity and the cycling stability of the negative electrode material are improved, and the negative electrode material has relatively good rate capability; and the negative electrode material is prepared by taking the titanium-containing blast furnace slag as a raw material, so that the cost of the raw material can be greatly reduced, and the environmental problem caused by solid waste accumulation can be solved.

The application discloses a preparation method of zinc oxide nanoflower fibers and application thereof. The preparation method comprises the following steps: cleaning and acid treating a nickel-chromium alloy wire base; preparing a zinc oxide seed layer on the surface of the nickel-chromium alloy wire base through an immersion-calcination method; and growing zinc oxide nanoflowers on the seed layer in situ through a hydrothermal method to obtain the zinc oxide nanoflower fibers. The fiber has the nickel-chromium alloy wire as the base, is good in flexibility and high in strength, has a firm combination of the zinc oxide nanoflower coating on the surface, is large in specific surface area, has rich active sites, and exhibits excellent selective adsorption capacity to polycyclic aromatic hydrocarbons. The application also provides application of the fiber in solid-phase microextraction, in particular, application of the fiber in enrichment and detection of trace polycyclic aromatic hydrocarbons in environmental water samples. The fiber is used for solid-phase microextraction of polycyclic aromatic hydrocarbons and detection of trace polycyclic aromatic hydrocarbons in environmental water samples, is low in detection limit, is good in reproducibility, is suitable for environmental water monitoring, and has important practical application value.

The present application relates to the technical field of biological medicine, and discloses inhalable aptamer modified molybdenum disulfide nanoflower compound and application thereof.The compound comprises a molybdenum disulfide nanoflower core, a dendritic polylysine modification layer attached to the surface of the molybdenum disulfide nanoflower, doxorubicin loaded on the molybdenum disulfide nanoflower and / or the dendritic polylysine modification layer, and AS1411 aptamer combined on the outer surface of the dendritic polylysine modification layer by electrostatic assembly.The compound can be delivered to a lung lesion by atomization inhalation or aerosol inhalation, and undergoes responsive structural change under the action of hydrogen peroxide in a tumor microenvironment, generates active oxygen, and promotes the release of doxorubicin, so as to realize the synergistic antitumor effect of chemotherapy and chemical dynamic therapy.The compound has good colloidal stability, drug loading capacity, active targeting ability and lung local delivery potential, and can be used for preparing inhalation preparations or local administration preparations for treating lung cancer.

The invention belongs to the field of electrochemical detection, and particularly relates to an integrated monolithic electrode adhered by a functional membrane, a preparation method and application of the integrated monolithic electrode in metal ion detection. The integrated monolithic electrode is characterized in that a working electrode, an auxiliary electrode and a reference electrode are integrated on a chip, the working electrode is the integrated monolithic electrode bonded by the functional membrane, the surface of a matrix electrode is modified, and the surface of the matrix electrode is coated with a coating; the modification material is one or more of carbon nanoflowers with a porous cage-shaped structure, metal nanoparticles and an enhanced electron conduction film. According to the invention, a working electrode in an integrated monolithic electrode is used as a substrate electrode, and the surface of the working electrode is cooperated with carbon nanoparticles and gold nanoparticles with porous cage structures through a functional film, so that a sensing system with excellent interface characteristics is constructed, and the sensor has the advantages of high sensitivity and high stability.

The application relates to the field of surface-enhanced Raman scattering, and specifically provides a three-dimensional SnSe2 surface-enhanced Raman scattering substrate and a preparation method thereof. The three-dimensional SnSe2 surface-enhanced Raman scattering substrate comprises a filter layer, a plurality of filter holes are arranged on the filter layer, a SnSe2 nanostructure layer is fixedly arranged on the upper side of the filter layer, the SnSe2 nanostructure layer is composed of SnSe2 nanostructures, the SnSe2 nanostructure is SnSe2 nanoflower, the SnSe2 nanoflower covers the filter layer, and the SnSe2 nanoflower blocks the filter holes on the filter layer. No vertical gap exists in the SnSe2 nanoflower structure, which makes the local effect of the SnSe2 nanoflower on a light field better, so that the Raman signal enhancement factor is improved. The preparation method of the three-dimensional SnSe2 surface-enhanced Raman scattering substrate comprises the following steps: S1, preparing SnSe2 nanoflower; S2, preparing an aqueous solution of the SnSe2 nanoflower; and S3, performing suction filtration to obtain the SnSe2 surface-enhanced Raman scattering substrate. The preparation method does not use a molecular beam epitaxy method, and the cost is low.

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

The application belongs to the field of functional materials, and particularly relates to a flow core nanoflower / polymer composite fiber membrane, a triboelectric electrode, a triboelectric device and preparation and application thereof. The flow core nanoflower / polymer composite fiber membrane is a fiber membrane material formed by interlacing and weaving of functional nanofibers. The functional nanofibers include polymer fibers and flow core nanoflowers dispersedly distributed in the polymer fibers. The polymer in the polymer fibers is a positive polymer or a negative polymer. The flow core nanoflower is a flower-shaped nanoparticle, which includes a gallium-indium composite oxide shell with a corrugated surface and a gallium-indium alloy core in a flow state filled in the shell. The application innovatively disperses the nanoflowers with a special flow core structure in the polymer fibers, so that the interface adaptability of the material can be changed, the application requirements of the triboelectric device can be met, and the triboelectric performance can be improved.

This invention relates to the field of adsorbent technology, and discloses a PANIBi2S3 nanocomposite material, its preparation method, and its application. The composite material is polyaniline-coated bismuth sulfide; the bismuth sulfide has a nanoflower morphology. The nanocomposite material obtained by this invention has good iodine adsorption capacity.

The invention discloses an Aspergillus niger detection kit based on SERS (Surface Enhanced Raman Scattering) and a preparation and detection method thereof, the kit comprises an SERS nano-label, the structure of the SERS nano-label takes bionic gold nanoflower as a gold core, and the surface of the gold core is modified with a Raman reactive dye and an Aspergillus niger specific aptamer. The kit has high sensitivity, specificity, reproducibility, uniformity and stability, Raman spectrum can be collected through portable Raman spectrum equipment, the kit can be used for analysis of trace Aspergillus niger in a sample, and the detection limit is lower than 10 CFU / mL. Compared with a traditional bacterial culture method, the method has the advantages in the aspects of simplicity and convenience in operation, detection period, analysis cost and the like. The method is suitable for food safety monitoring.

This invention discloses a NiAlEu-LDHs photocatalyst, its preparation method, and its application in catalytic CO2 synthesis of syngas, belonging to the field of catalyst preparation technology. The NiAlEu-LDHs photocatalyst is a europium-doped layered double hydroxide prepared by a hydrothermal reaction using nickel, aluminum, and europium sources, possessing a multi-level nanoflower-like structure assembled from nanosheets. The preparation method includes the following steps: a one-step hydrothermal method is used to dissolve the nickel, aluminum, and europium sources, along with urea and ammonium fluoride, in deionized water; the solution is then transferred to a polytetrafluoroethylene-lined autoclave for hydrothermal reaction. This invention introduces europium through a one-step hydrothermal method, constructing a europium-doped nanoflower-like NiAlEu-LDHs photocatalyst. In production applications, this invention's preparation method is simple and novel, with low synthesis cost, easy mass production, and significant application value.

The application provides a glucose detection test strip and a preparation method and application thereof. The preparation method of the glucose detection test strip comprises the following steps: taking copper sulfate pentahydrate, a phosphate buffer solution, glucose oxidase and horseradish peroxidase, mixing uniformly to obtain an enzyme-containing mixed solution; immersing a test strip in the enzyme-containing mixed solution, and obtaining an organic-inorganic hybrid nanoflower loaded test strip after reaction; immersing the organic-inorganic hybrid nanoflower loaded test strip in a mixed solution containing a chromogenic agent, a gel, bovine serum albumin and polyethylene glycol to obtain a glucose detection test strip. The preparation method of the glucose detection test strip has higher sensitivity and shorter response time.

The application discloses an aspergillus niger detection kit based on SERS and a preparation and detection method thereof. The kit comprises a SERS nanolabel, and the structure of the SERS nanolabel is that a bionic gold nanoflower is used as a gold core, and a Raman active dye and aspergillus niger specific aptamer are modified on the surface of the gold core. The kit has high sensitivity, specificity, reproducibility, uniformity and stability, can collect Raman spectrum through a portable Raman spectrum equipment, can be used for analyzing trace aspergillus niger in a sample, and the detection limit is lower than 10 CFU / mL. Compared with a traditional bacterial culture method, the kit has advantages in operation simplicity, detection period and analysis cost. The kit is suitable for food safety monitoring.

The present invention is a catalyst for a photocatalytic reaction for the production of hydrogen by hydrolysis and a preparation method thereof. A preparation method of a catalyst for a photocatalytic reaction for the production of hydrogen by hydrolysis, comprising: after dispersing the ZnO nanorods into a solvent, adding TiCl4 and water, followed by hydrothermal treatment, washing and drying to obtain a ZnO@TiO2(B) nanoflower catalyst, i.e. the catalyst. According to the present invention, a catalyst for a photocatalytic reaction for the production of hydrogen by hydrolysis and a preparation method thereof, embedding ZnO nanocrystals into a TiO2(B) lattice can improve the stability of photocatalytic hydrogen production.

The invention relates to the field of catalysts, and discloses a preparation method of a metal-loaded hierarchical porous amorphous nanoflower catalyst, which comprises the following steps: S1, dissolving ammonium molybdate tetrahydrate in a mixed solution for reaction, cooling to room temperature, washing and drying to obtain a product I; s2, adding the product I into a mixed solution for ultrasonic dispersion, then adding ammonium molybdate tetrahydrate, sequentially adding a tris (hydroxymethyl) aminomethane solution and a dopamine hydrochloride solution under vigorous stirring, then rapidly dropwise adding ammonia water, continuously stirring for reaction, and then performing centrifugal separation, washing and drying to obtain a product II; s3, taking the product II, adding ketjen black, grinding, heating to 800 DEG C in an N2 atmosphere, preserving heat at a constant temperature, and naturally cooling to obtain a product III; and S4, dissolving the product III in ethylene glycol for ultrasonic treatment, dissolving chloroplatinic acid in deionized water, transferring into ethylene glycol, slightly stirring, transferring into a reaction kettle for reaction, cooling to room temperature, taking out a product IV, washing and drying to obtain the catalyst. The catalyst provided by the invention has abundant microporous and mesoporous structures, and accelerates electron and proton transmission.

The invention provides a nickel electrode with a multi-level structure and a preparation method thereof. The preparation method mainly comprises the following steps: preparing a bottom-layer concave-convex substrate structure by mixed acid dipping, and forming a middle layer and a catalyst layer structure by surface heterogeneous growth. According to the method, tight combination of the catalyst layer and the substrate is taken as a guide, the uneven nickel metal substrate is obtained through mixed acid etching aiming at the problem that the catalyst is prone to falling off, and a highly rough surface is provided for in-situ growth of a subsequent columnar middle layer. The nickel metal substrate and the nanoflower layer catalyst are connected through the middle layer, the binding force of the catalyst and the substrate is effectively increased, the catalyst is prevented from falling off, and industrial stable water electrolysis is achieved. The surface of the synthesized nickel electrode with the multi-level structure has excellent performance stability, the overpotential is only increased by 8 mV when the nickel electrode runs for 1000 hours under the current density of 500 mA cm <-2 >, and only 1.83 V is needed when the nickel electrode is in an electrolytic bath.

The present application relates to a kind of three-dimensional sea urchin-like Bi2S3 / Bi2O2S or ZnO / Bi2O2S heterojunction and its preparation method and application in photoelectric detector, the Bi2S3 / Bi2O2S heterojunction is made of Bi2S3 Nanorod and Bi2O2S nanoflower, the ZnO / Bi2O2S heterojunction is made of ZnO Nanorod and Bi2O2S nanoflower;The Bi2O2S nanoflower is made of ultrathin Bi2O2S nanosheet, Bi2O2S nanoflower is uniformly grown on substrate;Bi2S3 Nanorod is grown on the surface of ultrathin Bi2O2S nanosheet constituting Bi2O2S nanoflower;ZnO Nanorod is grown on the surface of ultrathin Bi2O2S nanosheet constituting Bi2O2S nanoflower;The Bi2S3 / Bi2O2S heterojunction or ZnO / Bi2O2S heterojunction as a whole presents three-dimensional sea urchin-like structure.The method of the present application can effectively promote the carrier separation of Bi2O2S, improve the sensitivity, responsivity of photoelectric detector.Simultaneously, one-dimensional Bi2S3 Nanorod or ZnO Nanorod is grown on the surface of Bi2O2S, forms three-dimensional sea urchin-like Bi2S3 / Bi2O2S heterojunction, or ZnO / Bi2O2S heterojunction, light is reflected and absorbed on the surface of material multiple times, improves the light absorption utilization rate, further improves the detection performance of photoelectric detector.

The application discloses a method for recycling waste lithium ion battery positive electrode material into nanoflower functional material, and relates to the technical field of battery recycling, which comprises the following steps: discharging and disassembling a recycled waste lithium cobalt oxide lithium battery to obtain a positive electrode sheet; performing heat treatment on the cleaned and dried positive electrode sheet to separate an aluminum foil and a positive electrode material; performing hydrothermal reaction on the obtained positive electrode material and formaldehyde solution; drying the obtained filter residue to obtain a transition metal oxide nanoflower functional material product rich in oxygen vacancies and active groups; and further performing precipitation, filtration and drying on the mother liquor to obtain lithium carbonate powder. The method has the advantages that the recycled positive electrode material and formaldehyde solution are subjected to hydrothermal reaction, the preparation of nanoflower functional material is realized, lithium carbonate is selectively recycled, and formaldehyde is efficiently degraded.

This invention discloses a modified sodium carboxymethyl cellulose (CMC) and its preparation method in the field of composite materials. The method involves first dissolving CMC in water to obtain a solution, and simultaneously ultrasonically treating a multi-scale heterogeneous nano-flower-like hydrotalcite-silicon hybrid material and a dispersant in water to obtain a slurry. The two materials are then mixed and stirred under gentle heating to obtain a blended composite liquid. Finally, the modified CMC product is obtained through casting, segmented heat treatment, and grinding. The hybrid material is prepared by synergistic modification of hydrotalcite with bifunctional silanes, further compounded with silica via a sol-gel method, and finally treated with an initiator in an aqueous phase. This hybrid material significantly improves the compatibility and interaction with the CMC matrix. The process conditions of this invention are mild, the operation is simple, and the resulting product exhibits excellent comprehensive performance, showing application potential in the field of composite materials.

The invention discloses an efficient synthesis method of ephedrine hydrochloride, and belongs to the technical field of pharmaceutical chemistry synthesizing.A self-synthesized chiral zinc oxide nanoflower composite catalyst is added in the synthesis process of the ephedrine hydrochloride, and the composite catalyst has a chiral function, is large in pore and surface area, easy to recover and not prone to blockage, and can be used for preparing a chiral zinc oxide nanoflower catalyst. Compared with a traditional Lewis acid type catalyst, the catalyst has the advantages that keto groups in ephedrine hydrochloride synthesis can be precisely reduced, and hexadecyl trimethyl ammonium bromide is intercalated on the surface, so that the catalyst is not easy to agglomerate in a catalytic system, and the yield of a product is further improved; according to the composite catalyst, through hexadecyl trimethyl ammonium bromide, the surface hydrophilicity and hydrophobicity of the composite catalyst are regulated and controlled, the composite catalyst is dispersed more uniformly and makes contact with a compound II more sufficiently, the speed and selectivity of a reductive amination reaction are improved, and the hexadecyl trimethyl ammonium bromide can intercalate mica lamellas, so that the mica lamellas are peeled off, the interlayer spacing is increased, and therefore the composite catalyst is more stable in performance. And the reaction sites are increased, so that the catalytic active center is loaded more stably.