76 results about "Anion intercalation" patented technology

The invention provides a corrosion-inhibiting anionic intercalated hydrotalcite / nano oxide composite material, a preparation method thereof and application of the corrosion-inhibiting anionic intercalated hydrotalcite / nano oxide composite material. The preparation method is as follows: corrosion-inhibiting anions are directly inserted between hydrotalcite layers by the one-step coprecipitation method and the roasting restoring method; the nano oxide is generated by means of in situ synchronization during the process of generation of hydrotalcite crystals by controlling the mixture ratio of divalent metal ions to trivalent metal ions, the pH value of a reaction solution and the reaction temperature; and the corrosion-inhibiting anionic intercalated hydrotalcite / nano oxide composite material with the anti-corrosive function is prepared. The invention is mainly characterized in that the in situ preparation method for the hydrotalcite / oxide composite material provided with a nano lamellar structure improves the release amount of a corrosion inhibitor and reduces the water absorption of a coating by leading into the corrosion inhibitor with the anti-corrosive function and the nano oxide which is generated in situ during the reaction process. The composite material can be used to be pigment of an anti-corrosive metallic coating system, and particularly has potential application value in improving the anti-corrosive performance of a magnesium alloy anti-corrosive coating.

The invention provides a preparation method of a carbon-coated transition metal phosphide composite material and application of the carbon-coated transition metal phosphide composite material to the oxygen evolution reaction. Firstly, a pointed transition metal hydroxide precursor containing anion intercalations of a phosphorus source and a carbon source between layers is prepared through synthesis, and then the podiform carbon-coated transition metal phosphide composite material is obtained through high-temperature roasting. The composite material is applied to the positive pole reaction-oxygen evolution reaction of electrolysis of water, can effectively improve the performance of a catalyst, namely lowering the take-off potential and improving catalytic activity, and is long in service life and good in stability. Meanwhile, raw materials of the composite material are low in cost and have abundant reserves, the preparation method is simple, and environment friendliness is achieved. Under the alkaline condition of 0.1-1 M KOH, the overpotential required by the electric current density of 10 mA / cm<2> is 280-340 mV, and the Tafel slope is 60-80 mV / dec; and under the constant voltage of 1.65 V, the circulation time is as long as 1-24 hours or longer.

A process for preparing nylon 6 / montmorillonite composite is characterized by use of reaction-extrusion method, that is, the caprolactam and said montmorillonite take part in intercalation polymerization in the reaction extruder to inserting the caprolactam monomers in anionic layers of montmorillonite. Its advantages are high strength, modulus and thermal deformation temp, better isolating performance, simple process, and low cost. It can be used to prepare high-performance engineering plastics and fibres.

The invention provides a method for electrodepositing an inhibitor anion intercalation hydrotalcite film on the surface of magnesium alloy. In a three-electrode system, a solution containing corrosion-inhibition anion intercalation hydrotalcite is used as electrolyte, magnesium alloy is used as a working electrode, a platinum sheet is used as a counter electrode, N2 is introduced at room temperature, the pH value of the electrolyte is 4.5 to 8.5, the scanning rate is 5 to 30mV / s, the scanning frequency is 5 to 15 times, and a hydrotalcite film is formed on the surface of the magnesium alloy by an electrodepositing method. In the invention, the corrosion-inhibition anion intercalation hydrotalcite forms a film on the surface of the magnesium alloy by the electrodepositing method, a protective film with the functions of adsorbing corrosive ions and releasing an inhibitor is formed on the surface of the magnesium alloy by the etching of trace Cl and the excellent adsorption and film formation characters of corrosion-inhibition ions, and the film layer has corrosion prevention character, has favorable binding property with a magnesium alloy basal body and can also be better bonded with an organic coating.

The invention relates to a core-shell type magnetic nano-composite particle based on Fe3O4 and houghite and a preparation method thereof, belonging to the technical field of magnetic nano material technology and drug slow / control release technology. The magnetic nano-composite particle has a typical core-shell structure. The preparation method comprises the following steps: preparing a nano ferroferric oxide particle with a controllable particle diameter and even distribution in advance by adopting a solvent thermal method, and then coating a layer of organic carbon being rich in hydroxy on the surface of the particle; further coating inorganic anion intercalation houghite with different thickness on the surface of the particle through coprecipitation self assembly, obtaining a magnetic control targeting drug carrier with the core-shell structure through baking, and then obtaining a magnetic drug-loaded nano-particle having the core-shell structure and the slow / control release performance by means of a structure memory effect load antiinflammatory agent or anticarcinogen with a houghite structure. The invention has the advantages that the prepared novel magnetic nanocomposite particle has even particle diameter distribution and integrated core-shell structure.

The invention provides the organic anion intercalation hydrotalcite containing double bond, whose chemical formula is [M2+1-xM3+x(OH)2]An-x / níñmH2O. An is organic anion intercalation hydrotalcite containing double bond, such as maleic acid group, acroleic acid group, butenoic acid group, and so on. Because the double bond of organic anion intercalation hydrotalcite can react with the conjugate double bonds produced by PVC, the long-term thermal stability of PVC is improved markedly. The hydrotalcite can effectively improve the effectively of PVC.

The invention belongs to the technical field of clean energy, and in particular relates to a hydrotalcite precursor adsorbent and a preparation method thereof. After a precursor is calcined, an absorbent which is high in acidic gas adsorption capacity and high in adsorption dynamics and particularly can remove gas such as CO2 and H2S from a medium-temperature region from 200 to 400 DEG C can be provided. The adsorbent precursor is a hydrotalcite type adsorbent which is decorated by alkaline metal salt and supported by a relatively-large anion (particularly organic anions) insertion layer. The adsorbent precursor has the characteristics of alkaline metal salt decoration and organic anion insertion layer supporting, namely by the anion insertion layer supporting, the distance between the original two anion hydrotalcite layers is greatly prolonged, so that an alkaline metal salt ornament can be uniformly distributed on the surfaces of the hydrotalcite layers and among the hydrotalcite layers; the alkaline metal decoration effect is enhanced; and the gas adsorption amount and the adsorption speed of the calcined adsorbent are greatly improved.

The present invention provides a kind of RE complex anion intercalated hydrotalcite with fluorescent property and its preparation process. Through ion exchange, the RE complex anion enters to interlamination of the hydrotalcite to constitute laminated material with RE complex anion accounting 40-100 % of the total interlamination anion mole number; and after the RE complex intercalation enter the interlamination of the hydrotalcite, the fluorescent performance may be maintained. The present invention utilizes the intercalating and assembling performance and the laminate controlling and locating effect of laminated hydrotalcite material to assemble RE ion with excellent optical performance into interlamination of the hydrotalcite and to realize the molecule level hybridization of RE ion in interlamination of the hydrotalcite. Through regulating the laminate metal, the present invention prepares organic and inorganic hybridized luminous material with homogeneously distributed RE element and adjustable material grain size.

The invention relates to the antibacterial technology, in particular to a sustained-release penicillin anion intercalation hydrotalcite material as well as preparation and application thereof. The hydrotalcite material has the following chemical composition general formula of [M<2+>1-xM<3+>x(OH)2]<x+>(C16H17N2O4S<->)x.nH2O, wherein M<2+> is the divalent metal ion of Mg<2+>, Zn<2+>, Ni<2+>, Fe<2+> or Mn<2+>, M<3+> is the trivalent metal ion of Al<3+>, Cr<3+>, Fe<3+>, V<3+>, Co<3+>, Ga<3+> or Ti<3+>, the molar ratio of M<2+> / M<3+> is 1.6-4.5, and x is more than or equal to 0.2 and is less than or equal to 0.4. The invention provides the sustained-release penicillin anion intercalation hydrotalcite material and a preparation method thereof. The material is characterized in that penicillin anions are introduced be among hydrotalcite layers; penicillin anion antibacterial agent is released by exchanging anions in the environment and the penicillin anions among the layers to achieve the antibacterial purpose and obviously improve the light and heat stability of penicillin molecules, and the sustained-release penicillin anion intercalation hydrotalcite material has the possibility of serving as the filler of the antibacterial coating to achieve the function of inhibiting microorganism staining.

The invention provides a preparation method of organic acid anion intercalation hydrotalcite, belonging to the technical field of functional materials. Aiming at the problem that single organic acid anion intercalation hydrotalcite can not be obtained by one step in the prior art. The preparation method comprises the following steps of: with the oxide or hydroxide of divalent metal elements and trivalent metal elements as raw materials, mixing the divalent metal elements and the trivalent metal elements in the raw materials at the molar ratio of 2:1-4:1, and then adding excess organic acid solid to be intercalated to obtain a mixture; adding the mixture into deionized water from which CO2 is removed; fully and evenly stirring the mixture to obtain a suspension; placing the suspension in a pressure reaction kettle for reacting or placing in a container to carry out heating reflux reaction to obtain a product; and filtering, washing and drying the product to obtain the organic acid anion intercalation hydrotalcite. The invention has wide raw material source, low cost and simple process flow and can prepare the organic acid anion intercalation hydrotalcite only by one step.

The invention discloses blue light emitting materials of tri(8-hydroxyquinoline-5-sulfonate) aluminum complex anion intercalated hydrotalcite and a preparation method thereof, and belongs to the technical field of inorganic / organic composite luminescent materials. In the method, a surfactant of which the molecular length is similar to that of tri(8-hydroxyquinoline-5-sulfonate) aluminum complex anions is selected so as to obtain the composite luminescent material, dispersed uniformly among hydrotalcite layers, of the tri(8-hydroxyquinoline-5-sulfonate) aluminum complex anion intercalated hydrotalcite by a coprecipitation method. The method realizes the immobilization of the tri(8-hydroxyquinoline-5-sulfonate) aluminum complex anions, improves the heat stability of luminescent molecules of the metal complex and realizes the conversion from the green light luminescent material tri(8-hydroxyquinoline-5-sulfonate) aluminum to the blue light luminescent materials of hydrotalcite intercalated products thereof.

The invention discloses a process flow for deep treatment of desulfurization wastewater. By supplementing divalent metal cations Ca<2+> and trivalent metal cations Al<3+> and adjusting the pH value of the system, the cations and abundant complicated anions in the desulfurization wastewater coprecipitate under certain conditions to form CaAl-LDH or MgAl-LDH or other multi-element layered double hydroxide precipitates, wherein abundant metal ions existing in the wastewater can also serve as configurational ions intercalated into the LDH layered plate, and part of oxyacid radical ions are cooperatively treated through interlayer anion intercalation or LDH surface adsorption action. According to the process flow for deep treatment of desulfurization wastewater, by using the adjustability and diversity of the LDH composition and fully utilizing the intercalation principle of chlorine ions and sulfate radicals in the LDH structure, the LDH can be synthesized immediately in the wastewater treatment process to remove the chlorine ions, so that the defect that the chlorine ions can not be effectively removed in the current triple tank process is compensated for; and the two discrete processes of LDH synthesis and wastewater treatment can be completed in one system, thereby saving the treatment cost.

The invention discloses a preparation method of an ionic intercalation type two-dimensional material. The preparation method comprises the following steps: enabling salt to be in a molten state at preset temperature by using a molten-salt growth method; adding a metal salt precursor in molten salt; and reacting for preset time and taking out, cooling, cleaning, carrying out suction filtering and drying to obtain the ionic intercalation type two-dimensional material. Positive ion intercalation type two-dimensional metallic oxide and negative ion intercalation type two-dimensional metal hydroxide can be prepared; types of positive ions and negative ions in the prepared two-dimensional material can be regulated and controlled by materials of the molten salt and metal salt; another ionic intercalation type two-dimensional material can also be prepared by the method; and the prepared ionic intercalation type two-dimensional material has quite large application prospect in the aspects of energy storage, catalysis, ion exchange and the like.

The disclosure relates to a material for reversibly storing and releasing hydrogen comprising graphite or a graphitic structure, for example, comprising an ordered graphite structure of carbon and nitrogen atoms wherein the interlayer and / or interstitial volume is occupied with at least one intercalated anionic species. While any suitable anionic species can be employed, examples of suitable species are at least one of: F− (fluoride), (C≡C)2− (diacetylide), and (N═C═N)2−. Desirable anionic species typically have a relatively high charge to volume ratio. The disclosure also relates to a material for reversibly storing and releasing hydrogen comprising ordered graphitic structures comprising at least one member selected from the group of graphite, single walled carbon nanotubes, multiwalled carbon nanotubes, graphite nanofibers, carbon nanohorns, and boron nitride. The carbon materials may incorporate substitutional nitrogen atoms in the graphite lattice at a level ranging from about 1 to about 40 atomic percent.

The invention relates to an antibacterial technology and in particular relates to a graphene oxide / hydrotalcite composite antibacterial film material and preparation and application of the graphene oxide / hydrotalcite composite antibacterial film material. The preparation method comprises the following steps: casting a mixed solution of a graphene oxide solution and penicillin anion intercalation hydrotalcite colloidal solution which is taken as raw materials according to a mass ratio of 1-4:1 to obtain the graphene oxide / hydrotalcite composite antibacterial film material. The obtained graphene oxide / hydrotalcite-based functional nano composite film material has an ordered structure and has slow-release properties and an antibacterial function.

The invention belongs to the technical field of semiconductor nanocomposite materials, and particularly relates to a one-dimensional ZnS (zinc sulfide) / CdS-C nanocomposite material and a preparation method thereof. Zinc salt and benzoate are used as raw materials for preparing a one-dimensional lamellar metal hydroxide precursor of a benzoate anion intercalation layer; then, the one-dimensional lamellar metal hydroxide precursor and hydrogen sulfide gas take a gas solid reaction, so that zinc hydroxide is converted into ZnS; then, cation exchange with cadmium salt is performed to obtain the nanocomposite material with ZnS and CdS which are uniformly dispersed in a one-dimensional ordered arrangement benzoic acid substrate; then, the nanocomposite material is roasted at high temperature in protection gas environment; the one-dimensional ZnS / CdS-C nanocomposite material can be obtained. The method has the advantages that a template agent and a structure auxiliary are not needed; sulfuretted hydrogen is used as a sulfur source; in-situ pyrolysis is performed to obtain the one-dimensional ZnS / CdS-C nanocomposite material which has high activity, high dispersibility, high crystallinity degree, high purity and high stability and can respond to visible light. Compared with the prior art, the synthesis method provided by the invention has the advantages that the preparation process is simple; the cost is low; the energy consumption is little; controllable preparation can be realized.

The invention discloses a preparation method of diphenylamine sulfonate intercalated hydrotalcite material which belongs to the technical field of preparation of inorganic and organic compound function materials, and application of the material serving as an oxidation-reduction discolored material and an electrochromic material. The technical scheme disclosed by the invention is as follows: the diphenylamine sulfonate intercalated hydrotalcite material which is uniformly dispersed in hydrotalcite layers is obtained by intercalation through a coprecipitation method by adopting a hydrothermal reaction and taking NaOH as an alkaline reagent. The material can fully utilize the space limited range effect of the hydrotalcite layers to immobilize an object, so that the material is used as the oxidation-reduction discolored material and the electrochromic material. The composite material oxidized or reduced is substantially unchanged in structure, and the cyclic voltammetry curve verifies that compared with pure diphenylamine sulfonate, the composite material has good oxidation-reduction reversibility and potential application value in the fields such as the oxidation-reduction discolored material and the electrochromic material.

The present invention is the preparation process of phosphotungstic anion intercalated strontium aluminate hydrotalcite as one kind of solid acid catalyst for C9 arene alkylation to separate and prepare trimethylbenzene. The preparation process includes the following steps: dissolving Al(NO3)3.9H2O in 15-21 weight portions and Sr(NO3)2 in 18-25 weight portions separately in deionized water of 100 weight portions and mixing via stirring; dropping 0.1 mol / L concentration NaOH or CsOH solution slowly while heating to reach pH 8.2-9.1; dispersing the precursor in deionized water to form suspension with solid content 7-10 %, dissolving phosphotungstic acid in 3-5 wt% in the suspension, and ion exchanging and filtering in a ultrasonic vibrator; adding NaOH or CsOH solution to regulate pH value to 6.0-6.5, suction filtering and stoving at 60-100 deg.c in an oven.

The invention discloses a piezofluorescent color changing material with an intercalation structure and a preparation method thereof, belonging to the field of inorganic and organic composite intelligent materials. In the invention, a piezofluorescent color changing material of fluorescent brightening agent 357 anion intercalation layered double hydroxides (LDHs) is prepared by adopting a coprecipitation method. The invention has the advantages that the molecular immobilization of a fluorescent brightening agent 357 is realized by carrying out sequential orienting arrangement on fluorescent guest molecules among LDHs layers; and a molecular accumulating form of the fluorescent brightening agent 357 among the LDHs layers can be continuously changed by applying external pressure so as to realize the aim of adjusting and controlling the emitting conversion of the composite material between blue light and green light under the condition of external high and low pressure and prepare the solid piezofluorescent color changing material with excellent performance and intercalation structure. Meanwhile, the application range of LDHs and the fluorescent brightening agent 357 in the novel intelligent material is expanded.

Disclosed are an azo dye congo-red intercalated hydrotalcite and the preparation method, with the following chemical formula: (M2+(1-x) M3+xOH2)x+ (C32H22N6O6S22-)b*mH2O. First of all, a hydrotalcite precursor with the interlaminar anions being NO3- or Cl- is prepared through nucleation or crystallization isolation, then the azo dye congo-red anions substitute for the interlaminar anions through hydrothermal ion exchange and enter the interlayers of the hydrotalcite to compose the anionic supramolecular layered material of the azo dye congo-red anionic intercalated hydrotalcite. The preparation method is as follows: firstly, the hydrotalcite precursor is prepared through nucleation or crystallization isolation; then the precursor is processed with hydrothermal ion exchange reaction with congo-red solution in a reactor to obtain the hydrotalcite composite material of azo dye congo-red bivalent anionic intercalation. The method of the invention has the advantages that the azo dye anions with larger ion radius are successfully introduced into the interlayers of the hydrotalcite, and the optical thermal stability of intercalated products is also greatly improved.

The present invention discloses polymer intercalation calcium-aluminum hydrotalcite that is used as the additive for the concrete and a method for producing the polymer intercalation calcium-aluminum hydrotalcite. The chemical formula of the polyacrylic acid root intercalation calcium-aluminum hydrotalcite is [Ca2Al(OH)6]n*(CH2CHCOO)n*nmH2O, wherein, n is the polymerization degree of the sodium polyacrylate and is valued in the range of 5 to 800; m is the quantity of the crystal water and is valued in the range of 0.5 to 10. The preparation steps: CaAl-PAAS is prepared with the preparation methods of the conventional hydrotalcite material such as double-dropping method, the neacleation / crystallization separation method and the ion exchanging method, and then the XRD and IR characterizations are performed. The present invention has the advantages that the preparation and the characterization problems of the polymer anion intercalation calcium-aluminum hydrotalcite are resolved.

The invention relates to the technical fields of light industrial and chemical materials, and in particular relates to a halogen-free synergistic composite flame retardant and a preparation method thereof. The halogen-free synergistic composite flame retardant is formed by performing an in-situ compounding chemical reaction on an anion intercalation-modified layered double hydroxide (LDH) and phosphonitrilic chloride trimer through a silane coupling agent, and has a layered structure. The preparation method of the halogen-free synergistic composite flame retardant comprises the following steps: step 1, preparing the anion intercalation-modified layered double hydroxide; and step 2, preparing the halogen-free synergistic composite flame retardant. The halogen-free synergistic composite flame retardant provided by the invention has more excellent flame-retardant and smoke suppressing comprehensive properties compared with the LDH or the phosphonitrilic chloride trimer; the flame retardant has very good compatibility with polymer materials such as epoxy resin in addition to good thermal stability and flame retardancy; the halogen-free synergistic composite flame retardant not only retains a cyclic structure of the phosphonitrilic chloride trimer, but also is used to prepare some polyacid anion intercalation-modified layered double hydroxides by a reconstruction process, and therefore the smoke suppressing effect can be improved while the flame retardant effect is improved.

The invention provides electrolyte and a lithium ion secondary battery as well as a preparation method, which relates to the field of batteries. The electrolyte is prepared from a solvent and two or more electrolyte lithium salts, wherein positive ions of the electrolyte are lithium ions, and negative ions are two or more ions with different radius. The invention also provides a lithium ion secondary battery. The lithium ion secondary battery comprises a positive electrode, a negative electrode as well as a diaphragm positioned between the positive electrode and the negative electrode and theelectrolyte, since the electrolyte adopts two or more negative ions with different radius, the intercalation speed, the de-intercalation speed and the negative ion intercalation amount of the negativeions in a positive electrode active material can be increased, so that the lithium ion secondary battery based on the electrolyte has higher energy density, excellent rate capability and high cyclingstability, and the problems of the existing ion battery adopting the single electrolyte that the large radius of the negative ions in the electrolyte leads to the lower energy density, poor rate capability and poor cycling stability of the battery can be solved.

The invention discloses preparation of anion intercalation modified hydrotalcite, a product and application in smoke suppressing rigid polyvinyl chloride products. A coprecipitation method is used for preparing the anion intercalation modified hydrotalcite, namely the uron derivative intercalation modified magnalium binary hydrotalcite, and the mole ratio of magnesium ions and aluminum ions is 2:1-3:1. Uron derivatives are barbituric acid and cyanuric acid, the use amount of the barbituric acid is 0.9-1.8 that of the mole number of the magnesium ions, or the use amount of the cyanuric acid is 0.6-1.2 that of the mole number of the magnesium ions. The anion intercalation modified hydrotalcite integrates the advantages of conventional hydrotalcite and uron derivatives and is free of toxins and environmentally friendly; the anion intercalation modified hydrotalcite is used in cooperation with a calcium and zinc heat stabilizing agent, the heat stabilizing effect is good, the problem that the stabilizing effects of environmental-friendly heat stabilizing agents are poor is solved, in addition, the heat deformation temperature of the PVC rigid products can be effectively increased, smoke generated in PVC combustion is inhibited, and the anion intercalation modified hydrotalcite can be widely applied to the fields of pipes, door and window special-shaped materials, decoration plates and the like.

The invention provides a halogen anion intercalated hydrotalcite positive electrode material, a preparation method thereof and a halogen anion battery, and belongs to the technical field of electrochemistry. The invention provides a preparation method of a halogen anion intercalated hydrotalcite positive electrode material. The method comprises the following steps: mixing two soluble metal salts,hexamethylenetetramine and water and then carrying out coprecipitation reaction; then oxidizing the fluorine ion intercalated hydrotalcite nanosheet material or the chloride ion intercalated hydrotalcite nanosheet material by utilizing liquid bromine to obtain a bromide ion intercalated hydrotalcite nanosheet material; preparing a fluorine ion intercalated hydrotalcite nanosheet material or a chloride ion intercalated hydrotalcite nanosheet material with a high-concentration sodium fluoride solution or a sodium chloride solution as a raw material through an acid exchange method; and preparingthe positive electrode material of the halogen anion battery by taking the halogen anion intercalated hydrotalcite nanosheet material as a raw material. The halogen anion intercalated hydrotalcite nanosheet material prepared by the method provided by the invention is regular hexagonal in morphology, large in particle size, high in crystallinity, large in capacity and good in cycling stability.

A preparation method of the high-energy-density and high-voltage graphite-zinc-based ion battery based on the aqueous electrolyte comprises the following steps: (1) dissolving soluble bromine salt into a saturated zinc chloride solution to obtain a high-concentration (-30mol / L) electrolyte; and (2) coating the graphite positive electrode material with a film by using a wet film preparation methodto prepare the positive electrode plate;(3) assembling the electrolyte, the positive pole piece and the negative pole metal zinc foil into the simple soft package battery. According to the invention,a novel high-concentration zinc chloride + bromine salt aqueous electrolyte is designed as a core, a reversible intercalation reaction can be carried out in a graphite electrode based on the electrolyte, and the high capacity of 257mAh g <-1 > can be obtained under the condition that the average potential is 1.71 V (p-Zn / Zn < 2 + >). The graphite-zinc-based dual-ion battery with the limit voltageof 2V or above is assembled, and the energy density of the battery can reach 440Wh kg <-1 >. The halogen anion intercalation mechanism is combined with the high energy density of the conversion reaction, so that the energy density of the aqueous zinc-based battery is greatly improved.

The invention provides an anion intercalation double-metal hydroxide adsorbent, a preparation method and application thereof, and belongs to the technical field of heavy metal adsorption materials. The preparation method disclosed by the invention comprises the following steps: carrying out hydrothermal reaction on a divalent metal magnesium salt, a trivalent metal aluminum salt and urea to obtain a precursor MgAl-CO3-LDH; adding nitric acid and sodium nitrate into the precursor to obtain a sample MgAl-NO3-LDH; and carrying out hydrothermal reaction on the MgAl-NO3-LDH and a sodium phytate salt hydrate to obtain the anion intercalation double-metal hydroxide adsorbent. Compared with other chelating agents, the MgAl-PA-LDH prepared by the method disclosed by the invention has a stronger chelating effect with metal ions and more adsorption sites, and has a very excellent treatment effect on sewage containing cadmium ions. The anion intercalation double-metal hydroxide adsorbent is prepared through an ion exchange method and a hydrothermal reaction, and the obtained product has better stability when being used in acidic sewage.

The invention discloses a corrosion-inhibition anion intercalation layered double-metal hydroxide and a preparation method and application thereof, aims to improve the corrosion resistance of a water-based anti-corrosion coating, and relates to the technical field of water-based anti-corrosion coatings. The chemical composition of the corrosion-inhibition anion intercalation layered double metal hydroxide is [M1<2+> (1-x) M2<3+> x (OH2)] X + (A<n->) x / n, wherein M1<2+> comprises Mg < 2 + >, Zn < 2 + >, Ni < 2 + >, Co < 2 + >, Cr < 2 + >, Mn < 2 + > or Fe < 2 + >, M2<3+> comprises Al < 3 + >, Fe < 3 + > or Ce < 3 + >; and A < n-> comprises PO4 < 3-> and SiO3 < 2->, n is 2 or 3, and x is 0.2-0.35. The corrosion-inhibition anion intercalation layered double-metal hydroxide and the modifier thereof can be added into a water-based epoxy coating layer in a certain proportion independently or in a combination of two or more of the corrosion-inhibition anion intercalation layered double-metal hydroxide and the modifier. The corrosion-inhibition anion intercalation LDH provided by the invention has the characteristics of sheet structure and anion exchangeability, can keep uniform arrangement in a water-based coating, prolongs the way for a corrosive medium to reach a metal matrix, and improves the water-proof and anti-corrosive properties of the water-based coating. In addition, when the water-based coating layer is damaged, the coating layer can be repaired.

The invention provides a Schiff base palladium anion intercalated hydrotalcite. The preparation method of the Schiff base palladium anion intercalated hydrotalcite comprises the steps of firstly, complexing the metal palladium with a Schiff base to prepare a Schiff base palladium complex; secondly, synthesizing the hydrotalcite-like material of a Schiff base palladium anion intercalation through the one pot method. According to the technical scheme of the invention, the Schiff base palladium anion intercalated hydrotalcite improves the dispersiveness and the utilization rate of the noble metal palladium. When the Schiff base palladium anion intercalated hydrotalcite is applied to the solid-phase catalytic oxidation Heck reaction, the material is better in catalytic performance.

The invention provides magnesium alloy micro-arc oxidation electrolyte and a preparation method thereof and a magnesium alloy surface treatment method. The magnesium alloy micro-arc oxidation electrolyte comprises the following components by mass concentration: 15-70 g / L of sodium hydroxide, 5-40 g / L of sodium silicate, 5-25 g / L of sodium carbonate, 0.5-3 g / L of anionic surfactants, and 1-10 g / L of microcapsules; and the microcapsules comprise corrosion-inhibition anionic insertion layer hydrotalcite capsule cores, and capsule walls coated on the capsule cores. The magnesium alloy micro-arc oxidation electrolyte is additionally provided with a proper amount of the microcapsules with corrosion-inhibition anionic insertion layer hydrotalcite as the capsule cores; after coating layers are broken, corrosion-inhibition anions are fed in solution to exchange with Cl-; the hydrotalcite achieves an effect of covering wound surfaces of the broken coating layers; and dual effects of corrosion inhibition and self-repair of the coating layers are achieved.