118results about "Hydrotalcite" patented technology

The invention relates to the technical field of heavy metal wastewater treatment, and discloses a preparation method of porous calcium-aluminum hydrotalcite and application of the porous calcium-aluminum hydrotalcite in wastewater lead removal. According to the specific scheme, an ionic liquid aqueous solution is used as a reaction solvent and a template agent, aluminum, calcium and sodium compounds are used as solutes, the porous aluminum-calcium hydrotalcite with uniform pore diameter and high adsorption capacity is synthesized, and the lead removal rate of the porous calcium-aluminum hydrotalcite can reach 98% or above. Compared with a traditional mode, the adopted preparation method is higher in efficiency, industrialization development of the porous material is facilitated, and a more excellent material can be provided for heavy metal removal.

The invention discloses a method for simultaneously extracting lithium and silicon from a lithium-containing mineral, which comprises the following steps: carrying out reduction reaction on the lithium-containing mineral under the action of a metal reducing agent to prepare a reduction product, and carrying out atmosphere ball milling and water leaching on the reduction product in an inert gas atmosphere to obtain a lithium-rich water leaching solution and a first solid; carrying out first dilute acid leaching on the first solid to obtain a lithium-rich pickle liquor and a second solid; obtaining a silicon nanomaterial from the second solid; the lithium-rich pickle liquor or a mixture of the lithium-rich pickle liquor and natural minerals and an alkali solution are dropwise added into water at the same time, stirring is conducted, pH is regulated and controlled, heating stirring is conducted for a period of time for dynamic crystallization, then static crystallization is conducted, and solid-liquid separation is conducted to obtain lithium-rich supernate and a third solid; a layered multi-metal hydroxide is obtained from the third solid. According to the method, a lithium extraction process and a silicon nano material preparation process are coupled, elements such as lithium and silicon in minerals are fully utilized, comprehensive utilization of the elements is realized, waste of resources is avoided, and economic benefits are greatly improved.

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 discloses a preparation method and application of a two-dimensional composite material. The preparation method comprises the following steps: adding MXene into formamide, carrying out ultrasonic dispersion to obtain an MXene formamide dispersion liquid, then adding MgAl LDH into the MXene formamide dispersion liquid, carrying out magnetic stirring, washing with absolute ethyl alcohol, and carrying out vacuum drying to obtain a two-dimensional composite material which is marked as MgAl LDH / MXene. The two-dimensional composite material is used for a lithium-sulfur battery diaphragm barrier layer so as to inhibit the shuttle effect of polysulfide. The preparation method is simple and environment-friendly, and the prepared MgAl LDH / MXene two-dimensional composite material is high in specific surface area, has strong affinity to polysulfide, can promote rapid transmission of lithium ions, can provide an instant electron conduction way for adsorbed polysulfide, is applied to a diaphragm barrier layer of a lithium-sulfur battery, and has a good application prospect. The wettability of the electrolyte on the diaphragm and the conversion of polysulfide are enhanced, the problem of volume expansion in the cycle process of the lithium-sulfur battery is relieved, and the redox reaction kinetics is accelerated.

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 battery diaphragms, in particular to a hydrotalcite-aramid diaphragm composite material and a preparation method and application thereof.The preparation method comprises the steps that a metal compound for preparing hydrotalcite and an aramid diaphragm are added into water, the soaking temperature and the soaking time are controlled, and after hydrotalcite grows on the aramid diaphragm in situ, the hydrotalcite-aramid diaphragm composite material is obtained; and washing with clear water, and drying to obtain the hydrotalcite aramid diaphragm composite material. The hydrotalcite aramid diaphragm composite material has a relatively high specific surface area, provides a large number of lithium ion adsorption sites, is beneficial to improving the ion transmission rate, and provides a basis for high-rate charge and discharge. The hydrotalcite grows in the aramid diaphragm fiber in situ, the thickness of the diaphragm is not increased, the high-temperature thermal shrinkage performance of the diaphragm is improved, and the energy density of a battery cell is improved.

The invention relates to the technical field of inorganic / organic composite film functional materials, and discloses a hydrotalcite material as well as a preparation method and application thereof. Carrying out a colloid mill nucleation reaction on the first mixed salt solution and an alkali solution to obtain hydrotalcite seed crystal slurry; mixing the second mixed salt solution, a slow-release precipitator, an anionic high-molecular polymer and a high-polarity polymer to obtain a mixed solution; dropwise adding the obtained mixed solution into hydrotalcite seed crystal slurry, and reacting to obtain a hydrotalcite material; wherein the first mixed salt solution and the second mixed salt solution both contain soluble divalent metal salt and soluble trivalent metal salt, and the types and the concentrations of the metal salts are the same. The hydrotalcite material provided by the invention has a larger plane size, and can effectively prolong the diffusion path of gas in a film and improve the gas barrier property when being added into a polymer matrix (such as polyurethane) as a functional aid.

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 invention discloses a preparation method of an MXene / LDHs heterojunction self-assembly anticorrosive coating, and belongs to the technical field of ocean engineering anticorrosion, the preparation method of the MXene / LDHs heterojunction self-assembly anticorrosive coating comprises the following steps: S1, respectively adding MXene and LDHs into an electrolyte solution, separating and airing the MXene and the LDHs in the electrolyte solution to obtain an MXene precipitate and an LDHs precipitate; s2, respectively dissolving the aired MXene precipitate and LDHs precipitate in a solvent again, and carrying out ultrasonic dispersion to obtain an MXene solution and an LDHs solution; s3, manufacturing a liquid battery jar, and dividing the liquid battery jar into a cathode region and an anode region by using an insulating diaphragm; s4, adding the MXene solution into the cathode region of the liquid battery jar, adding the LDHs solution into the anode region of the liquid battery jar, taking out the insulating diaphragm, and turning on the power supply; and S5, carrying out centrifugal treatment on the mixed solution in the liquid battery jar, collecting MXene / LDHs heterojunction precipitates, and adding the MXene / LDHs heterojunction precipitates into the anticorrosive paint. The corrosion resistance of the coating can be improved, and the corrosion risk of an ocean engineering material is reduced.

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 discloses an amidoximation hydrotalcite-antimonene composite material and a preparation method and application thereof.The preparation method comprises the steps that firstly, the surface of hydrotalcite is modified with an amino group, then the amino group is used for grafting and modifying a cyano group, the cyano group is converted into a hydroximic acid group through an amidoximation reaction, and amidoximation hydrotalcite is obtained; the amidoximation hydrotalcite is dispersed to form amidoximation hydrotalcite colloidal dispersion liquid, then the amidoximation hydrotalcite colloidal dispersion liquid and antimonene dispersion liquid are mixed and stacked to form a two-dimensional layered composite material, and then the two-dimensional layered composite material is obtained through centrifugation and drying. The composite material not only can effectively inhibit agglomeration of antimonene and hydrotalcite nanosheets, but also can increase active sites of the material combined with uranyl ions, and when the composite material is applied to electrochemical detection of uranyl ions, the composite material has high conductivity and high stability of antimonene and high specific adsorption of hydrotalcite.

A method for treating an acid exhaust gas having a first step of treating an acidic gas in an acid exhaust gas with a OH-type Mg-Al layered double hydroxide, an equipment for treating an acid exhaust gas having means for performing the method for treating, and an incineration facility having the equipment for treating.

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.