96results about "Hydrotalcite" patented technology

The invention relates to the technical field of water and soil remediation, in particular to magnesium-based hydrotalcite for treating multi-metal co-pollution as well as preparation and application of the magnesium-based hydrotalcite. The magnesium-based hydrotalcite laminate is customized by regulating and controlling trivalent metal elements and object interlayer anions of the magnesium-based hydrotalcite host laminate, the trivalent metal elements are one of Al (III), Fe (III) and the like, and the object interlayer anions are one of CO3 < 2->, NO3 <-> and the like. Preferably, the magnesium-based hydrotalcite is MgAl-CO3, MgAl-NO3, MgFe-CO3 or MgFe-NO3, and the magnesium-based hydrotalcite is a magnesium-based hydrotalcite or magnesium-based hydrotalcite. The LDHs-based material can mineralize heavy metal ions in an ultra-stable manner, and is suitable for rapidly, efficiently, stably and simultaneously removing various heavy metals, and mineralized products have extremely low Ksp (about 10-50), so that secondary pollution caused by secondary dissolution of the heavy metals is avoided.

The invention relates to the technical field of solid waste resource utilization, in particular to aluminum-based hydrotalcite synthesized through solid waste coal gangue in-situ crystallization and a preparation method and application of the aluminum-based hydrotalcite. The preparation method comprises the following steps: (1) mixing coal gangue with acid and water, stirring at 80-95 DEG C for 0.5-3 hours to remove impurities, filtering, washing and drying to obtain impurity-removed coal gangue; (2) roasting the impurity-removed coal gangue at 600-850 DEG C for 0.5-5 hours to obtain roasted coal gangue microspheres; and (3) mixing and reacting the roasted coal gangue microspheres with calcium salt / magnesium salt, acid and water, dripping alkali to adjust the pH value to be 7-9, aging, strengthening the phase seed crystal, dripping alkali to adjust the pH value to be 10-12, crystallizing at 100-150 DEG C for 12-72 hours, and post-treating to obtain the product. According to the method, coal gangue is used as an aluminum source, the crystallinity of aluminum-based hydrotalcite is improved, the cost is reduced, and solid waste recycling is achieved. The product can be used for flue gas desulfurization or used as an FCC sulfur transfer agent, has excellent desulfurization and sulfur transfer performance, and has a wide application prospect.

The invention relates to the technical field of material preparation, and particularly discloses a graphene and hydrotalcite composite material and a preparation method thereof.The preparation method comprises the steps that graphite is delaminated to prepare a graphene oxide solution, then the graphene oxide solution, a metal salt solution and an organic ligand solution are mixed and stirred in sequence, standing and processing are conducted, and then a GO and MOF composite material is obtained; and finally, putting the graphene-hydrotalcite composite material into a polar solvent mixed solution containing nitrate, etching and converting at room temperature, washing, and drying to obtain the graphene-hydrotalcite composite material. The preparation method is mild in condition and can be completed at normal temperature and normal pressure, the two-dimensional flaky hydrotalcite in the prepared composite material is arranged on the surface of the graphene in an array mode, the composite material has a unique structure and excellent performance, many defects of a traditional high-temperature and high-pressure preparation technology are overcome, and the composite material has great application potential in the fields of electrochemistry and the like.

The invention discloses a preparation method and an application of a flower-like Mg-Al LDH (layered double hydroxide) modified polydimethylsiloxane / polyethersulfone composite membrane. The preparation method comprises the following steps: dissolving polyethersulfone in N, N-dimethylacetamide, scraping a membrane, and soaking the membrane in deionized water; the preparation method comprises the following steps: dissolving PDMS in an isooctane solvent, adding LDH with different concentrations, continuously stirring until LDH is completely dispersed, adding PDMS, a cross-linking agent and a catalyst into the cross-linking agent and the catalyst according to a mass ratio of 10: 2: 1, and preparing the coating by adopting a wet film dip-coating method. And coating to obtain the modified composite membrane. The method is mainly applied to preparation of gas-liquid two-phase gas separation so as to obtain a composite membrane material with high CO2 / O2 selectivity and high gas permeability. Meanwhile, the method is simple in preparation process, the raw materials are cheap and easy to obtain, the LDH modified composite membrane can effectively improve the gas permeability and selectivity of the material, and a new preparation thought is provided for preparing a good CO2 gas separation membrane.

The present invention provides a novel method for producing an ion-exchanged hydrotalcite, the method including no complicated steps, needing no massive equipment, and enabling a hydrotalcite to be ion-exchanged while inhibiting the formation of a by-product, etc.　This method for producing an ion-exchanged hydrotalcite (3) is characterized by comprising a first step, in which a powdery or pasty hydrotalcite (1) is mixed and reacted with an aqueous solution of an acid (2) so that the resultant mixture has a water content in the range of 10-60 mass%, and a second step, in which a reaction product obtained in the first step is dried and pulverized without via a cleaning step.

The invention discloses a magnesium-aluminum hydrotalcite / carbon nanotube composite material and a preparation method and application thereof, and the preparation method of the magnesium-aluminum hydrotalcite / carbon nanotube composite material comprises the following steps: S1, carrying out acid pretreatment on a carbon nanotube; and S2, preparing the magnesium-aluminum hydrotalcite / carbon nanotube composite material. Compared with the prior art, the preparation method of the magnesium-aluminum hydrotalcite / carbon nanotube composite material has the advantages that Mg (NO3) 2.6 H2O, Al (NO3) 3.9 H2O, CO (NH2) 2 and pretreated carbon nanotubes are adopted, and magnesium-aluminum hydrotalcite grows on the carbon nanotubes through a hydrothermal homogeneous precipitation method; through the synergistic effect of the carbon nanotubes and the magnesium-aluminum hydrotalcite, aggregation among nanoparticles is effectively prevented, the growth size of the particles is limited, and the magnesium-aluminum hydrotalcite / carbon nanotube composite material is good in crystallinity, small in particle size, high in specific surface area and high in adsorption performance. In a radioactive uranium element adsorption experiment, the adsorption efficiency is as high as 95.6%, and the adsorption capacity is as high as 17.32 mg / g.

The application discloses a hydrotalcite nanocomposite, a preparation method and application thereof. The composite material comprises hydrotalcite nanosheets and metal nanoclusters uniformly distributed on the hydrotalcite nanosheets; the metal nanoclusters are selected from any two of palladium nanoclusters, rhodium nanoclusters and ruthenium nanoclusters; the metal cations in the hydrotalcite nanosheets are divalent metal ions and trivalent metal ions; the divalent metal ions are selected from one or more of Cu 2+ , Mg 2+ and Ni 2+ ; the trivalent metal ions are selected from Al 3+ and / or Fe 3+ . The hydrotalcite nanocomposite has good catalase-like and glucose oxidase-like activities, can effectively relieve hypoxic microenvironment and consume glucose in tumor cells, further induce bisulfide death, and due to the two-dimensional confinement effect of the hydrotalcite nanosheets, can effectively increase the singlet oxygen production efficiency of noble metals, and realize tumor treatment of drugs.

According to the present embodiment, there is provided a resin composition for bonded magnets which is excellent in physical properties such as heat resistance, bending strength, and IZOD impact strength without decreasing magnetic properties and which reduces generation of corrosive gas. There is provided: a resin composition for bonded magnets that includes a magnetic powder, a PPS resin, and a hydrotalcite powder, in which the content of the hydrotalcite powder is 0.1 to 25.0 wt% relative to the PPS resin; and a molded body of the resin composition for bonded magnets.

The application discloses a hydrotalcite nanocomposite, a preparation method and application thereof. The composite comprises a high-entropy hydrotalcite nanosheet matrix and platinum nanoclusters loaded on the matrix; and cations in the layer plate of the high-entropy hydrotalcite nanosheet matrix comprise cations of Cu, Mn, Co, Ni and Fe. A nanomedicine for treating tumors prepared by using the hydrotalcite nanocomposite has excellent catalytic ROS generation capacity.

The invention provides a hydrotalcite-based two-dimensional material and a preparation method thereof, and the preparation method comprises the following steps: S1, carrying out heat treatment on hydrotalcite at 300-600 DEG C to obtain a metal oxide; s2, dispersing a metal oxide in water to form a turbid liquid; and carrying out ultrasonic treatment on the turbid liquid in an ice bath until the turbid liquid becomes gel, and then drying to obtain the hydrotalcite-based two-dimensional material. According to the method, few-layer and single-layer two-dimensional materials can be obtained through a simple and mild preparation process.

The invention provides hydrotalcite for improving thermal stability and initial whiteness of PVC (polyvinyl chloride) and a preparation method of the hydrotalcite. The chemical composition of the hydrotalcite comprises M < 2 + > xM < 3 + > y (OH) 2x + 3y-x / 2 (CO3) x / 4. MH2O, wherein M < 2 + > is a divalent metal ion or a mixture of divalent metal ions and is selected from one or two of Mg < 2 + >, Ca < 2 + >, Ni < 2 + >, Zn < 2 + >, Mn < 2 + >, Cu < 2 + >, Co < 2 + >, Pd < 2 + > and Fe < 2 + >; m < 3 + > is a trivalent metal ion and is selected from one of Al < 3 + >, Ga < 3 + > and In < 3 + >; x and y are positive numbers, and the molar ratio of x to y satisfies x / y = 2.0-3.0; m is the content of crystal water, and m is 3.5-4.0. By regulating and controlling the specific surface area to be less than 20 m < 2 > / g, D50 to be less than 0.150 mu m and the grain size to be greater than or equal to 800 and combining a surface modification process, the compatibility and dispersity of the hydrotalcite and PVC are improved. The preparation method comprises the steps of raw material mixing and sanding, hydro-thermal synthesis, solid-liquid separation and washing, surface modification, drying and post-treatment, the hydrotalcite capable of improving PVC thermal stability and initial whiteness is obtained, the hydrotalcite can be uniformly dispersed in a PVC matrix, thermal decomposition is inhibited by absorbing HCl, the static aging time is prolonged, and meanwhile light scattering is reduced.

The invention belongs to the technical field of batteries, and particularly relates to a preparation method of lithium-aluminum hydrotalcite and a modified diaphragm thereof and an in-situ solid-state lithium battery prepared by optimizing an electrolyte ratio. The lithium-aluminum hydrotalcite provided by the invention is easy to regulate and control in size, stable at room temperature and high in ionic conductivity. According to the modified diaphragm provided by the invention, the lithium-aluminum hydrotalcite provided by the invention is adopted as an inorganic component, so that the ionic conductivity of the modified diaphragm is improved, and the electrochemical performance is excellent. According to the solid-state lithium battery provided by the invention, the modified diaphragm provided by the invention is combined with the ethyoxyl pentafluorocyclotriphosphazene, so that Li3N and LiF layers can be formed on the surface of an electrode / electrolyte, the compatibility with metal lithium is improved, and the ethyoxyl pentafluorocyclotriphosphazene has the advantages that the concentration of surrounding oxygen after a substance is burnt can be reduced; and free radicals generated in the combustion decomposition process are captured, the chain reaction of substance combustion is inhibited, and the safety performance of the battery is greatly improved by combining the free radicals with the in-situ solidification technology.

The present invention provides a method for producing layered double hydroxides with high water permeability. [Solution] The method for producing layered double hydroxide includes a production step of mixing an acidic solution and an alkaline solution to produce a slurry-like layered double hydroxide, and a filtration step of filtering the slurry-like layered double hydroxide, wherein the temperature of the layered double hydroxide in the production step is maintained at 30°C or lower and within a temperature range where it does not freeze.

The invention provides a quenching crystallization reaction system for preparing layered composite metal hydroxides and a corresponding preparation method, a high-pressure cooling distributor is additionally arranged between a reaction kettle and a collecting tank, and the high-pressure cooling distributor comprises a cavity and a quenching device which are communicated with each other; and a low-temperature cooling medium enters the cavity from the quenching device, is in direct contact with the high-temperature reaction slurry and rapidly cools the high-temperature reaction slurry, so that the layered composite metal hydroxide with the surface defect active site can be obtained. According to the invention, a cooling liquid system consistent with hydrotalcite reaction slurry is adopted, construction of defect active sites is realized for hydrotalcite through a quenching type cooling mode under the condition of not introducing impurities, the product performance can be effectively improved, the equipment requirement is low, the process is simple, the cost is effectively reduced, and the method is suitable for industrial production. And meanwhile, the impurity ion introduction problem caused by acid-base solvent etching and the like is also avoided, the process cleanliness is guaranteed, and the method is very suitable for industrial implementation.

A preparation method of modified hydrocalumite includes the following steps: Step 1, prepare a precursor. Mix calcium oxide, aluminum hydroxide, basic zinc carbonate and water together and stir to form a mixed slurry, then introduce carbon dioxide accounting for 0.1% - 3.0% of the total mass of the mixed slurry, adjust the mixed slurry to be alkaline, and the carbon dioxide is converted into interlayer carbonate under alkaline conditions to form a hydrocalumite lamellar structure. At the same time of the reaction, a catalyst is introduced into the mixed slurry to accelerate the formation of the hydrocalumite lamellar structure; carry out isothermal crystallization on the mixed slurry to obtain hydrocalumite with a complete crystal structure. In the hydrocalumite prepared in Step 2, add a surface modifier to perform surface modification on the hydrocalumite, and then carry out pressure filtration, drying and grinding to obtain the modified hydrocalumite. The modified hydrocalumite prepared by the present invention has a complete crystal form, excellent thermal stability, high yield and good stability in continuous production.

The present invention discloses a method for co-producing lithium phosphate and magnesium-based functional materials. The method comprises: subjecting salt lake brine to primary adsorption-desorption and secondary adsorption-desorption treatment in sequence to obtain a mixed desorption liquid; subjecting the mixed desorption liquid to a forward osmosis primary concentration treatment to obtain a primary concentrated liquid and forward osmosis fresh water; subjecting the primary concentrated liquid to a high-pressure reverse osmosis secondary concentration treatment to obtain a secondary concentrated liquid and reverse osmosis fresh water; mixing the secondary concentrated liquid with aluminum salt and alkaline solution to a first coprecipitation reaction to obtain a magnesium-based functional material and a filtrate; subjecting the filtrate to a boron removal treatment by an ion exchange method to obtain a boron-removed lithium-rich solution and boric acid; and subjecting the boron-removed lithium-rich solution to a lithium precipitation treatment by an ultrasonic precipitation-ultrasonic coupling method to obtain battery-grade lithium phosphate. The method provided by the present invention realizes the co-production of lithium phosphate and magnesium-based functional materials, and at the same time realizes the comprehensive, green, efficient and high-value development and utilization of salt lake resources.

The invention relates to the technical field of treatment of heavy metal ions in soil, and discloses a preparation method and application of a flower-like soil heavy metal ultra-stable mineralizer. A coprecipitation method is adopted, an alkali source is provided for a system through amino alcohol, a metal precursor preferentially grows in the specific direction in the reaction process, and then nanosheets are driven to be spontaneously assembled into a three-dimensional flower-shaped structure. Meanwhile, the amino alcohol can expand interlayer channels and enhance the anion exchange capacity of the material. The finally obtained hydrotalcite with the three-dimensional flower-shaped structure can efficiently adsorb and fix heavy metal ions in soil.

The present invention belongs to the technical field of sludge treatment, and specifically relates to a process for cascaded fractionation and utilization of sludge. The process for cascaded fractionation and utilization of sludge of the present invention comprises the following steps: (1) drying, crushing and floating the sludge to obtain carbon-rich sludge and sludge residue; (2) treating the sludge residue with an acid solution to obtain a metal salt solution and an acid-insoluble residue; (3) treating the carbon-rich sludge to prepare sludge charcoal; treating the metal salt solution to prepare magnesium-aluminum hydrotalcite; treating the acid-insoluble residue to prepare ceramsite. The process for cascaded fractionation and utilization of sludge of the present invention fractionates the sludge into high-quality cascades, and can prepare sludge charcoal, magnesium-aluminum hydrotalcite and ceramsite, thereby achieving the harmlessness, resource utilization and high-quality utilization of sludge.

The present invention provides a method for preparing magnesium-aluminum hydrotalcite from sludge. The preparation method comprises the following steps: Step 1: drying the sludge, ball-milling it, sieving it, and mixing it with a magnesium salt to form a mixture; pouring the mixture into an acid solution, stirring it, and letting it stand; collecting the supernatant to obtain a metal salt solution; and Step 2: mixing the metal salt solution and a mixed alkaline solution in deionized water, stirring to obtain a complex; transferring the complex to a reactor for crystallization; washing, filtering, separating, and drying to obtain the magnesium-aluminum hydrotalcite. The present invention can effectively utilize the magnesium-aluminum hydrotalcite prepared from the sludge. The product can be used as an adsorbent to treat heavy metal ion wastewater, has strong adsorption properties, and high yield, thereby achieving waste treatment with waste.

This invention relates to the field of solid waste resource utilization technology, specifically to the in-situ crystallization synthesis of aluminum-based hydrotalcite from solid waste coal gangue, its preparation method, and its application. The preparation method includes: (1) mixing coal gangue with acid and water, stirring at 80-95℃ for 0.5-3h to remove impurities, filtering, washing, and drying to obtain impurity-removed coal gangue; (2) calcining the impurity-removed coal gangue at 600-850℃ for 0.5-5h to obtain calcined coal gangue microspheres; (3) reacting the calcined coal gangue microspheres with calcium / magnesium salts, acid, and water, adjusting the pH to 7-9 with alkali, aging, adding solid phase seed crystals, adjusting the pH to 10-12 with alkali again, crystallizing at 100-150℃ for 12-72h, and then processing to obtain the product. This method uses coal gangue as the aluminum source, improves the crystallinity of aluminum-based hydrotalcite, reduces costs, and realizes solid waste resource utilization. The product can be used for flue gas desulfurization or as an FCC sulfur transfer agent. It has excellent desulfurization and sulfur transfer performance and has broad application prospects.

The invention relates to the technical field of fine chemical engineering, in particular to a method for recycling hydrotalcite production wastewater. The method comprises the following steps: carrying out filtration and synthetic reaction conversion on wastewater generated in hydrotalcite production, and carrying out heating reaction, filtration and drying to obtain the finished product hydrotalcite. According to the method provided by the invention, the wastewater generated in the hydrotalcite production process can be converted into the finished product hydrotalcite again, the reduction rate of OH <-> in the wastewater reaches 90% or above, the reduction rate of CO3 < 2-> reaches 82% or above, and material waste and environmental pollution are reduced; the method provided by the invention is low in production wastewater treatment cost and convenient to operate.

The invention relates to a method for preparing a suspension of layered double hydroxide particles, which comprises the following steps: putting a solution containing a layered double hydroxide precursor into heat preservation equipment for heat locking treatment, and reacting to obtain the suspension of the layered double hydroxide particles, in the heat locking treatment, the temperature is maintained only through heat preservation equipment under the normal pressure condition. The method disclosed by the invention has the beneficial effects that the locking heat treatment is carried out through heat preservation equipment, the layered double hydroxide precursor does not need to be continuously heated and pressurized, and the high-quality layered double hydroxide particles with high crystallinity and uniform morphology can still be synthesized under the condition of normal pressure.

The present invention provides a novel method for producing an ion-exchanged hydrotalcite, the method including no complicated steps, needing no massive equipment, and enabling a hydrotalcite to be ion-exchanged while inhibiting the formation of a by-product, etc. This method for producing an ion-exchanged hydrotalcite (3) is characterized by comprising a first step, in which a powdery or pasty hydrotalcite (1) is mixed and reacted with an aqueous solution of an acid (2) so that the resultant mixture has a water content in the range of 10-60 mass%, and a second step, in which a reaction product obtained in the first step is dried and pulverized without via a cleaning step.

The invention belongs to the technical field of building materials, and particularly relates to a method for preparing recycled concrete with high fatigue load resistance and recycling aggregate. Comprising the following steps: step 1, weighing raw materials including magnesium chloride, aluminum chloride, sodium hydroxide and deionized water, and preparing Mg-Al hydrotalcite from the raw materials; step 2, weighing raw materials: recycled coarse aggregate, river sand, cement, fly ash, silica fume, a water reducing agent, Mg-Al hydrotalcite and water, and stirring the raw materials to obtain recycled concrete with high fatigue load resistance; 3, carrying out a fatigue load test on the concrete; and step 4, carrying out secondary crushing treatment on the concrete subjected to the fatigue load test, and after the obtained recycled coarse aggregate is pretreated, the physical properties of the recycled coarse aggregate meet the performance requirements of the III-type recycled coarse aggregate, and the recycled coarse aggregate can be used for preparing structural concrete again. The prepared concrete is good in mechanical property and good in fatigue load resistance, meanwhile, recycling of aggregate can be achieved, and economical efficiency and environment friendliness are achieved.

The present invention provides a double metal layered hydroxide represented by the formula [M(II) 1‑x M(III) x (OH)2] x+ (A n‑ ) x / n ·mH2O, wherein M(II) contains a divalent cation selected from at least one of Mg, Zn, Ca, Ni, Co, Cu, Fe, Mn, and Sr, M(III) contains a trivalent cation selected from at least one of Al, Fe, Cr, Co, In, Ga, and V, A n‑ contains an anion selected from at least one of CO3 2‑ , OH ‑ , F ‑ , Cl ‑ , SO4 2‑ , NO3 ‑ , PO4 3‑ , B(OH) ‑ , VO4 3‑ , MnO4 ‑ , ClO4 ‑ , a carboxylate, a sulfonate, a sulfinic acid, and a thiocarboxylate, x is 0 < x < 1, n is the valence of A, and m is a number of 0 or more, and the double metal layered hydroxide has an average particle diameter D50 of 0.3 to 1.0 μm, a BET specific surface area of 8 to 25 m 2 / g, and a crystallite size of a D003 plane of 340 to 400 angstroms.

To provide a composite of a hydrotalcite compound and an amino acid, with the composite having a high aspect ratio while allowing for control of coloration.SOLUTION: The present disclosure relates to a composite that includes a hydrotalcite compound and an amino acid. The composite has an aspect ratio of 85 or more. An Y.I. value of the composite is 0-5. The Y.I. value indicates yellowness. A content of the amino acid in the composite is more than 0 mass% and equal to or less than 10.0 mass%. The content of the amino acid is a content with respect to the total mass of the composite.SELECTED DRAWING: Figure 2

The invention discloses a nitrous acid intercalation hydrotalcite montmorillonite composite material, a preparation method and application, and relates to the technical field of materials, the nitrous acid intercalation hydrotalcite montmorillonite composite material comprises Mg (NO3) 2.6 H2O (24-28 wt%); al (NO3) 3.9 H2O (50 to 58 weight percent); naNO2 (12 to 16 weight percent); a mixed solution (2-3 wt%) of NaOH and NaNO2; and Na-MTT (K-10) (0.1 to 0.3 wt%). The invention provides a NO2-LDHs (at) MMT core-shell structure composite material with excellent chloride ion adsorption capacity and steel bar corrosion resistance. The NO2-LDHs (at) MMT core-shell structure composite material has obviously enhanced chloride ion adsorption capacity and excellent corrosion inhibition effect.

The present invention belongs to the technical field of preparation of hydrotalcite-like compounds, and specifically relates to a method for controllable preparation of a hydrotalcite-like compound with a porous structure. In the nucleation and growth stages of LDH, SMA with a low molecular weight and a high anhydride content is added, so that LDH laminar plates with different hydrophobicities can be disorderly stacked during the sedimentation process, thus avoiding the problems that the hydrotalcite prepared by the template method is prone to exfoliation and the original structure of the hydrotalcite-like compound is easily damaged by the alkali etching method. The stacking method adopted by the present invention can obtain a hydrotalcite-like compound with a porous structure on the surface by control.

The invention provides an oxygen-containing small-molecule intercalated hydrotalcite, a rubber composite material, and a preparation method and application of the oxygen-containing small-molecule intercalated hydrotalcite and rubber composite material. The oxygen-containing small molecule intercalated hydrotalcite is obtained by mixing and reacting components including ethanol salt, methoxide and a solvent; the ethanol salt comprises divalent ethanol salt and trivalent ethanol salt; the rubber composite material is prepared from the following components: rubber, oxygen-containing small molecule intercalated hydrotalcite and a vulcanizing agent. The oxygen-containing micromolecule intercalated hydrotalcite prepared by the method has larger interlayer spacing and better dispersity in a rubber matrix, interlayer water can be removed at the temperature of 100 DEG C or below, the influence in the vulcanization process is avoided, and the oxygen-containing micromolecule intercalated hydrotalcite is suitable for a high-temperature vulcanization environment, is used in a rubber composite material and can improve the gas barrier property of the composite material.

The application discloses a method for preparing ultrathin layered composite metal hydroxide by using an atom economy reaction. The method uses divalent and trivalent metal hydroxide and an amide compound as raw materials, and through ultrasonic-assisted strengthening separation, ultrathin LDHs nanosheets with a c-axis direction size of only 2-3 nm are synthesized in one step. The amide compound raw material is hydrolyzed to generate formate, acetate and the like into the interlayer of the LDHs under a hydrothermal environment, the carboxyl group of the amide compound raw material is attached to the surface of the LDHs nanosheet, hydrogen bonds are formed between the carboxyl group and the hydroxyl group on the surface of the nanosheet, the hydrogen bonds between the hydroxyl group and the interlayer water molecules are prevented from being formed, the electrostatic attraction between the LDHs layers is reduced, the mutual accumulation between the layers is weakened, and the separation of the LDHs layers is further promoted under the high-frequency oscillation of the ultrasonic wave, the thickness of the layer accumulation is significantly reduced, and the ammonia water generated in the reaction can be recycled and reused, and the product can be obtained without washing.