867 results about "Metal hydroxide" patented technology

The invention discloses crack-chloride ion double-triggered subsea tunnel corrosion-resistant concrete and a preparation method thereof, and relates to the field of subsea tunnel engineering materials. The concrete is prepared from the following components in parts by weight: 400 to 500 parts of Portland cement, 50 to 80 parts of fly ash, 60 to 100 parts of superfine mineral powder, 1000 to 1100 parts of coarse aggregate, 700 to 800 parts of fine aggregate, 140 to 160 parts of water, 10 to 20 parts of self-repairing microcapsules and 1 to 5 parts of a water reducing agent, the self-repairing microcapsule comprises a capsule wall material, a self-repairing material and a layered dihydroxyl composite metal oxide. A crack-chloride ion double-response system is constructed, and the limitation of traditional single trigger repair is broken through. When a crack with a certain width appears in the concrete, the capsule wall of the self-repairing microcapsule is broken to release the repairing component, so that effective filling of the crack is realized; and meanwhile, the layered double-metal hydroxide can directionally adsorb chloride ions to form a stable compound, so that the migration rate of the chloride ions is remarkably reduced.

The invention discloses a positive electrode material of an upward flow type electrochemical dephosphorization system, and the preparation method comprises the following steps: preparing a polyaniline-coated ZIF-8 derived carbon loaded magnesium-aluminum double-metal hydroxide electrode material, and the preparation process comprises ZIF-8 carbonization in a nitrogen atmosphere, aniline oxidation polymerization, and loading of magnesium-aluminum double-metal hydroxide by a coprecipitation method; the electro-adsorption positive electrode material belongs to a polyaniline magnesium aluminum double-metal hydroxide mesoporous synergistic platform in ZIF-8 derived carbon, and has a nano frame with strong pore accessibility and high electrochemical activity; the synergistic process comprises attraction of polyaniline to phosphate ions and trapping of the magnesium-aluminum double-metal hydroxide. The electrode prepared by the method has a unique mesoporous framework, a large number of phosphorus removal sites are obtained on the surface of the electrode, a rapid ion storage behavior mainly based on a capacitance control process is realized on a solid-liquid interface, phosphate in water can be effectively separated in an electro-adsorption system, and the method is a pollution control process with a clear mechanism.

Cu-based catalysts with excellent thermal stability for selective hydrogenation and a preparation method thereof are provided. The method includes: first, six mixed metal salts are instantaneously nucleated in an alkaline solution by the nucleation / crystallization isolation method, to prepare high-entropy composite metal hydroxides (H-LDHs) with uniform element distribution and similar metal proportions. Furthermore, well-crystallized high-entropy oxides (HEOs) are obtained based on the structural topology characteristics of H-LDHs, and a series of Cu-Mx / HEOs catalysts with flexible adjustable catalytic microzone geometries and electronic structures are obtained using the HEOs as precursors.

A free-flowing solid activator for a geopolymer mortar or concrete comprises or consists of an alkali(ne) metal carbonate surface treated with a sub-stoichiometric amount of alkali(ne) metal hydroxide. In one embodiment a method for producing an activated fly ash comprises: a) spraying an aqueous alkali(ne) metal silicate onto the surface of a solid particulate fly ash; b) drying the spray-treated product of step a); c) optionally grinding the dried product of step b); and optionally, repeating the spray treatment process for the product of step b) or step c) by returning the product of step b) or step c) to step a).

The invention relates to an elementary substance / alloy-metal oxyhydroxide anchored noble metal single atom / cluster heterojunction catalyst. A preparation method comprises the following steps: 1) dissolving a metal salt A, urea and ammonium fluoride in deionized water to obtain a mixed solution B; 2) performing hydrothermal reaction on the mixed solution B and a carrier to obtain a primary sample 1; 3) performing high-temperature calcination on the primary sample 1 in a mixed atmosphere of hydrogen and argon to obtain a primary sample 2; and 4) putting the preliminary sample 2 into a noble metal compound C solution for vacuum impregnation, taking out the sample after impregnation, and drying to obtain the catalyst. According to the scheme, the metal salt A is used as a metal source of a simple substance / alloy, the metal salt A is subjected to hydro-thermal synthesis to form a metal hydroxide and then subjected to high-temperature calcination reduction, the metal salt A is calcined to form the simple substance / alloy, then the simple substance / alloy is soaked in the precious metal compound solution C to form a metal oxyhydroxide, and meanwhile precious metal single atoms / clusters are anchored; the prepared catalyst is high in activity, and the preparation method is simple.

The present invention discloses a layered metal hydroxide composite catalytic material, its preparation method and application. The composite catalytic material comprises a carrier carbon nanotube and a metal hydroxide loaded on the carbon nanotube, and the metal is iron, cobalt and nickel. Preparation method: (1) Dissolve nickel salt, cobalt salt, iron salt and urea in an alcohol solution, stir evenly, then add carbon nanotubes, and continue to stir evenly to obtain a mixed solution; (2) Carry out a solvothermal synthesis reaction on the mixed solution obtained in step (1), filter, wash and dry after the reaction is completed to obtain the layered metal hydroxide composite catalytic material. The carbon nanotubes are introduced into the layered metal hydroxide in this composite catalytic material, reducing the precipitation of metal ions, avoiding the aggregation of hydroxides, improving the stability and catalytic activity of the catalytic material, and being used for activating persulfate to degrade organic pollutants, realizing the efficient activation of persulfate so as to improve the degradation rate of pollutants.

The invention discloses a method for preparing cyclohexylamine based on reductive amination of cyclohexanone, and belongs to the technical field of fine chemical engineering. The preparation method comprises the following steps: adding a reactant cyclohexanone into a reaction kettle containing a certain amount of solvent, ammonia water and hydrogen atmosphere, and carrying out reductive amination reaction in the presence of a catalyst to obtain cyclohexylamine. The catalyst is CoyAl-LDHs loaded with metal active components, the CoyAl-LDHs are layered cobalt-aluminum bimetal hydroxides, and cobalt ions and precious metal ions in laminates are subjected to spontaneous oxidation-reduction reaction, so that the precious metal ions can be efficiently reduced into active metal nanoparticles. The layered cobalt-aluminum double-metal hydroxide not only has abundant surface acid-base sites, but also has high dispersity of loaded metal nanoparticles. The catalyst preparation and reductive amination reaction conditions are mild, the yield is high, the reaction system is simple and easy to separate, and the method is suitable for industrial production of cyclohexylamine.

An adsorbent composition comprising: a plurality of particles of an acid-activated clay with a predetermined particle size. Each particle may have a surface comprising metal oxides or metal hydroxides and each particle may have a surface modified by coupling the metal oxides to ligands comprising amino-silane coupling agents configured to adsorb impurities. Each amino-silane coupling agents may comprise an alkoxysilane group and an amine group. The alkoxysilane group may couple to the metal oxide or metal peroxide of each particle. The adsorbent composition may comprise the amino-silane coupling agent and the acid-activated clay with a wight ratio between 2:2 and 3:1 (the acid-activated clay: the amino-silane coupling agent). The acid-activated clay may comprise a plurality of pore with a predetermined diameter formed between particles.

The invention discloses electronic-grade amine epoxy resin and a preparation method thereof, and belongs to the field of epoxy resin preparation. Aiming at the problems of more by-products and poor performance of the existing epoxy resin preparation, the invention provides the preparation method of the electronic-grade amine epoxy resin, which comprises the following steps: synthesizing a chlorohydrin ether intermediate from p-aminophenol and epichlorohydrin; meanwhile, a catalyst is added in the ring-opening reaction stage; carrying out removal of epoxy chloropropane; alkali metal hydroxide is added for a dehydrochlorination reaction, and a target product is generated in a closed-loop manner; and washing to remove excessive alkali metal hydroxides, and reacting to generate chlorides to obtain the electronic-grade amine epoxy resin. According to the method, the ring opening speed of phenolic hydroxyl is remarkably increased through the catalyst, so that epoxy chloropropane is fully reacted, and residues are reduced; according to the method, excessive epoxy chloropropane is removed, so that side reaction of epoxy chloropropane in a ring closing stage is avoided, generation of by-products is reduced to the greatest extent, operation is simple, and high-quality epoxy resin can be generated.

The invention belongs to the technical field of catalysts, and particularly relates to a ruthenium-based supported catalyst as well as a preparation method and application thereof. The ruthenium-based supported catalyst provided by the invention comprises a composite carrier and ruthenium supported on the composite carrier, the composite carrier is one or more of a perovskite type metal oxide and an alkali metal oxide, an alkali metal hydroxide, an alkaline earth metal oxide and an alkaline earth metal hydroxide which are dispersed on the surface of the perovskite type metal oxide; the preparation method of the composite carrier comprises the following steps: mixing a perovskite type oxide with an alkali metal hydride and / or an alkaline earth metal hydride, and carrying out first calcination; soaking the first calcined product in a solvent to obtain a composite carrier; the perovskite type oxide comprises one or two of MgTiO3 (magnesium titanate), SrTiO5 (strontium titanate), BaTiO3 (barium titanate) and CaTiO3 (calcium titanate); the solvent comprises an alcohol solvent and / or water. The catalyst provided by the invention can catalyze an ammonia synthesis reaction under a relatively low pressure.

The present application relates to the field of carbon capture. Embodiments of the present application provide systems, devices, and methods relating to metal hydroxide looping for capturing atmospheric carbon dioxide. Related systems for the electrolytic production of acids and bases for chemical processing and for materials handling are also described.

The invention belongs to the technical field of energy storage materials, and particularly relates to a phase change energy storage material and a preparation method thereof.The phase change energy storage material is prepared from 8-12 parts of phase change wax, 10-15 parts of ZnAl-LDH, 6-9 parts of SiC-CuS and 8 parts of polyethylene glycol dimethyl ether; according to the invention, the double-metal hydroxide and the phase-change wax are combined, interlayer water molecules and ionic bonds of the double-metal hydroxide can realize reversible phase change, the phase-change wax can be supported to reduce high-temperature flowing, the phase-change wax makes up for insufficient latent heat and improves energy storage capacity, and the combination of the double-metal hydroxide and the phase-change wax widens the phase-change temperature range and enhances cycle stability; in addition, Si-C loaded CuS nanosheets are introduced, energy can be transmitted under illumination or heat energy to assist storage, the smaller the size of the nanosheets is, the larger the specific surface area is, more active sites can be provided, the heat conduction efficiency is improved, complementation of all advantages of the material is achieved through a simple method, and good comprehensive performance is achieved.

The invention provides a polymer additive as well as a preparation method and application thereof, and the preparation method comprises the following steps: carrying out free radical reaction on a hypophosphorous acid aqueous solution and an antioxidant with ethylene under the action of an initiator to obtain a diethyl hypophosphorous acid aqueous solution; the diethyl phosphinic acid aqueous solution, sulfuric acid and metal hydroxide are subjected to a reaction, then alkali liquor is added, and diethyl phosphinate slurry with the pH value being 3.8-4.2 is obtained; mixing and stirring the diethyl hypophosphite slurry and a flocculating agent to obtain diethyl hypophosphite flocculate, and then filtering, washing and drying to obtain the polymer additive. Through the design of the preparation method, the polymer additive with a low acid value can be obtained, and when the polymer additive is used as a flame retardant to prepare a polymer material, the precipitation of an auxiliary agent in a high-temperature processing process can be inhibited, and mold scale can be reduced, so that the prepared polymer composition has relatively low content of water boiling precipitates, and the service life of the polymer composition under damp and hot conditions is prolonged.

The invention discloses a sewage treatment process for organic wastewater, and belongs to the field of sewage treatment.The sewage treatment process comprises the following steps that S1, wastewater containing nitrogen-containing organic phosphonic acid metal complexes is pumped into a dielectric barrier discharge reactor, and P-C bond energy is reduced through high-energy electron bombardment; s2, adding a modified layered metal hydroxide containing interlayer co-intercalation carbon quantum dots and persulfate and a composite oxidant of aspergillus niger immobilized microspheres into the wastewater subjected to plasma treatment; s3, deeply adsorbing heavy metal ions in the wastewater subjected to composite oxidation treatment in a gradient magnetic field by utilizing a magnetic layered metal hydroxide material; s4, the wastewater subjected to magnetic adsorption sequentially passes through an anaerobic ammonia oxidation coupling reactor and an aerobic biological membrane-activated sludge system to degrade pollutants; s5, dephosphorizing the wastewater subjected to biological treatment by algae by adopting a layered immobilized phycomycete symbiotic system; and S6, tail end magnetic recovery and effluent disinfection. The invention aims to solve the problems of low decomplexing efficiency and halfway decomplexing in the prior art.

The invention discloses an environment-friendly halogen-free flame-retardant composite special cable, and belongs to the technical field of cable preparation, the special cable sequentially comprises a conductor, an insulating layer, a glass fiber rope layer and an outer protective sleeve from inside to outside, and the insulating layer and the outer protective sleeve are prepared from a modified flame-retardant copolymer. The modified flame-retardant copolymer is prepared from the following raw materials in parts by weight: 65 to 80 parts of linear low-density polyethylene, 20 to 38 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of modified P-N-Si flame retardant 1, 3 to 6 parts of modified P-N-Si flame retardant 2, 0.5 to 1 part of initiator, 0.2 to 0.5 part of antioxidant and 25 to 35 parts of non-reactive flame retardant through melt copolymerization; a polyfunctional and rigid organic modified P-N-Si flame retardant is grafted, so that the migration of the flame retardant is reduced, the crosslinking degree is increased, and the mechanical and high-temperature-resistant properties are improved; the organic P-N-Si, the inorganic non-reactive flame retardant metal hydroxide and the nano inorganic particles have a synergistic effect, so that the cable is endowed with high flame retardance.

The invention provides a lime-sand polymerized building material for inhibiting saltpetering and a preparation method thereof, and belongs to the technical field of novel building materials, the material comprises a composite matrix material, a composite alkali activator, a slow-release organic acid microcapsule, a modified layered double-metal hydroxide and an saltpetering inhibiting auxiliary agent; the composite base material is formed by compounding fly ash and slag; the composite alkali activator is compounded by water glass and a NaOH aqueous solution; the slow-release organic acid microcapsule is prepared by coating a compound acid formed by mixing citric acid and tartaric acid with hydroxypropyl-beta-cyclodextrin and sodium alginate; the modified layered double hydroxide is prepared by calcining MgAl-LDH, then carrying out surface modification by a silane coupling agent, and then loading nano SiO2; the saltpetering inhibition auxiliary agent is compounded by phytic acid modified lignin microcapsules and thermal response carbonate; the phytic acid modified lignin microcapsule is prepared by modifying sodium lignin sulfonate with phytic acid and then coating with ethyl cellulose and polyvinyl alcohol; the thermal response carbonate is prepared by coating calcium carbonate with stearic acid.

The invention discloses a multi-metal layered hydroxide catalytic material and a preparation method and application thereof, and belongs to the technical field of catalytic materials.The preparation method of the multi-metal layered hydroxide catalytic material comprises the following steps that a one-pot solvothermal method is adopted, foamed nickel is soaked in a mixed solution for hydro-thermal synthesis, and the multi-metal layered hydroxide catalytic material is obtained; the multi-metal layered hydroxide catalytic material is prepared; wherein the mixed solution comprises a surfactant, a solvent and at least two of a nickel source, an iron source and a cobalt source. The CO2 desorption rate of the MEA solution is jointly improved through the synergistic effect of multiple metals and the # imgabs0 # acid site provided by the periphery of the metal hydroxide main layer. Under the condition that the desorption temperature (oil bath pan temperature) is 120 DEG C, the highest CO2 desorption rate of the FeCo (1 / 5) material with the best catalytic effect is increased to 7.68 mmol / min, and compared with 4.78 mmol / min under the blank condition, the desorption rate of the FeCo (1 / 5) material is increased by 60.7%, and the CO2 desorption rate is remarkably increased.

The invention provides a phosphate adsorption material and a preparation method thereof. The phosphate adsorbent material comprises: an inner core containing one of a metal compound and a metal silicate; an outer shell for covering the inner core, the outer shell comprising a composite metal oxide or a composite metal hydroxide; the inner core and the outer shell jointly form the phosphate adsorption material with the core-shell structure, the porous framework is of a monolithic integral structure, and the phosphate adsorption material with the core-shell structure is embedded in the porous framework. The adsorption material disclosed by the invention can be used for deeply removing phosphate in water pollution treatment.

The invention belongs to the technical field of electrode materials, and particularly discloses a self-supporting electrolyzed water catalytic electrode material, a preparation method and application thereof, the self-supporting electrolyzed water catalytic electrode material comprises a foamed nickel-molybdenum alloy as a substrate, and the surface of the foamed nickel-molybdenum alloy is covered with a two-dimensional layered nickel-iron metal hydroxide. The nickel-molybdenum alloy self-supporting nickel-iron double-metal hydroxide obtained by the technology is used as a bifunctional catalyst for hydrogen evolution and oxygen evolution reaction in a non-acidic medium. The foamed nickel-molybdenum alloy is used as a raw material of a current collector and a catalytic active site at the same time, a fresh crystal nucleus is formed on the surface of the foamed nickel-molybdenum alloy through one-step ferric ion etching, then the foamed nickel-molybdenum alloy is placed in air, and the catalytic activity of the nickel-molybdenum alloy is improved under the combined action of water and oxygen. The nickel element from the foamed nickel-molybdenum alloy and the adsorbed iron element spontaneously grow on the surface of the nickel-molybdenum alloy to form the layered double-metal hydroxide nanosheet.

An electrocatalyst including: a first nanostructure including copper hydroxide; and a second nanostructure including a metal of Groups 2, 4, or 11 to 14 of the Periodic Table of Elements, other than copper, a metal oxide of the metal, a metal hydroxide of the metal, or a combination thereof, wherein the electrocatalyst is effective to catalyze conversion of carbon dioxide into a multicarbon compound.

The invention belongs to the technical field of preparation of metal hydroxides, and particularly relates to a preparation method of nanoscale aluminum hydroxide micro powder. Comprising the following steps: (1) dispersing aluminum salt, glucose and long-chain alkyl quaternary ammonium salt in deionized water to prepare an aluminum salt mixed solution; (2) dropwise adding alkali liquor into the aluminum salt mixed solution; (3) reacting for a period of time, and adding the long-chain alkyl quaternary ammonium salt again for reacting; and (4) filtering, washing and drying to obtain the nanoscale aluminum hydroxide micro powder. Glucose not only plays a role of a template agent in the early stage of precipitation, but also reduces the particle size of precipitated particles. By adding the long-chain alkyl quaternary ammonium salt step by step, dispersion of the precipitate can be better promoted, and secondary agglomeration of the separated precipitate is prevented. The method is simple in process, the aluminum hydroxide micro powder is small in particle size, controllable in particle size and low in industrialization cost, and the current efficient, economical and environment-friendly requirements are met.

The invention is suitable for the technical field of MCA, and provides an MCA / PA6 flame-retardant composite material and a preparation method thereof. Comprising the following components in parts by weight: 50-60 parts of MCA, 15-20 parts of PA6, 15-25 parts of long glass fiber, 3-8 parts of metal hydroxide, 0.5-1.5 parts of titanium dioxide, 0.3-0.6 part of an antioxidant, 1-2 parts of nano silicon dioxide, 1-3 parts of zinc molybdate, 2-5 parts of aluminum hypophosphite, 1-2 parts of silicone resin, 0.5-1 part of carbodiimide and 5-8 parts of a toughening agent. The MCA / PA6 flame-retardant composite material disclosed by the invention combines the flame-retardant property of MCA and the excellent physical property of PA6, so that the flame-retardant property of the material is remarkably improved, and meanwhile, the original characteristics of light weight, good toughness, chemical resistance, good durability and the like of PA6 are maintained. By adding the long glass fiber, the metal hydroxide, the titanium dioxide, the antioxidant, the nano silicon dioxide, the zinc molybdate, the aluminum hypophosphite, the silicone resin, the carbodiimide, the flexibilizer and other components, the strength, the heat resistance and the flame retardant effect of the composite material are further enhanced.

The invention relates to the technical field of supercapacitors, and particularly discloses a spherical hollow multi-layer high-entropy metal oxide and a preparation method and application thereof. The spherical hollow multi-layer high-entropy metal oxide is prepared by the following steps: cross-linking metal cation nitrate comprising iron nitrate nonahydrate, zinc nitrate hexahydrate, copper nitrate hexahydrate, cobalt nitrate hexahydrate and nickel nitrate hexahydrate with dextrose monohydrate to generate spherical high-entropy metal hydroxide FeZnCuCoNi-HO with a solid core structure, and annealing to induce the metal hydroxide. And the spherical hollow multi-layer high-entropy metal oxide is formed. Compared with the prior art, the high-entropy metal oxide is prepared through a low-energy-consumption and simple synthesis method, the problem of volume change of the high-entropy metal oxide serving as an electrode material in the circulation process is solved, more reaction active sites are provided, an ion diffusion path is improved, and the specific capacitance of the composite material is improved while the specific capacitance of the composite material is improved. And the stability of the material is maintained, so that the energy storage performance of the supercapacitor is improved.

A battery module includes neighboring first and second battery cells and a heat sink in contact with and configured to absorb thermal energy from each of the battery cells. The module additionally includes a module enclosure surrounded by ambient environment, housing each of the first and second battery cells and the heat sink, and configured to include a thermal conductivity path from the first cell to at least one of the second cell and the heat sink and from the heat sink to the enclosure. The battery module further includes a metal-hydroxide element configured to undergo a chemical decomposition and discharge moisture within the thermal conductivity path in response to thermal energy released by the first cell when the first cell undergoes a thermal runaway event. The metal-hydroxide element thereby controls propagation of the thermal runaway event from the first cell to the second cell.

The invention relates to a preparation method of a nickel-based heterojunction composite catalytic electrode for hydrogen evolution, and belongs to the technical field of electro-catalysis. According to the method, the CC / NiCo-NiCo (OH) 2 electrode is prepared by regulating the pH value of the electrolyte and utilizing a local alkalescence environment generated by one-step electrodeposition, and the CC / NiCo-NiCo (OH) 2 electrode has a unique structure that NiCo layered metal hydroxide wraps NiCo alloy and has relatively large specific surface area and charge transfer capacity; the CC / NiCo-NiCo (OH) 2 electrode is phosphatized to obtain the CC / NiCo-NiCoP electrode, so that the electronic structure of the material is optimized, more defects are introduced, active sites are increased, and the gas desorption performance is improved; the nickel-based heterojunction composite catalytic electrode CC / NiCo-NiCoP / NiOx for hydrogen evolution is obtained through secondary electro-deposition of the CC / NiCo-NiCoP electrode, the surface NiOx layer plays a role in protecting the CC / NiCo-NiCoP electrode, and the corrosion resistance and cycling stability of the catalyst are improved.

The invention belongs to the technical field of cement concrete application, and particularly discloses a repairing material suitable for repairing hydraulic concrete at negative temperature and a preparation method thereof.The repairing material is prepared from, by mass, 530-690 parts of ordinary Portland cement, 60-170 parts of sulphoaluminate cement, 250-350 parts of mineral powder, 30-40 parts of expanding agent and 5-20 parts of multi-element layered metal hydroxide; the concrete comprises the following components in parts by weight: 60-80 parts of water, 3.0-4.6 parts of a water reducing agent, 0.9-1.8 parts of a defoaming agent, 6.2-8.2 parts of chopped fibers and 800-1000 parts of quartz sand. The repairing material can be used at negative temperature, meets the requirements of different hydraulic concrete repairing parts and construction processes, can effectively delay corrosion of corrosive ions in the environment to steel bars in hydraulic concrete, is particularly suitable for repairing damaged concrete in ocean engineering and water conservancy and hydropower engineering, and is large in market space and high in practicability.

To provide a resin composition which is excellent in flame retardancy and heat resistance, and can suppress moisture absorption and bleeding, without using a bromine-based flame retardant having a concern of an environmental regulation control.SOLUTION: A resin composition contains polyolefin, zeolite, an antioxidant, and a metal hydroxide, wherein the resin composition contains 0.1 pts.mass or more and 3.5 pts.mass or less of the zeolite with respect to 100 pts.mass of the polyolefin, and 1 pts.mass or more and 6.5 pts.mass or less of the antioxidant with respect to 100 pts.mass of the polyolefin, and a mass ratio of the zeolite to the antioxidant is 0.08 or more and 3 or less.SELECTED DRAWING: Figure 1

The invention relates to the technical field of sewage treatment, in particular to an urban sewage treatment plant sludge deep dehydration conditioner and an application method thereof, and the urban sewage treatment plant sludge deep dehydration conditioner comprises the following raw materials: functional layered composite powder, cationic polyacrylamide, diatomite and sodium carbonate. After the functionalized layered composite powder and the bentonite are organically modified by the lauryl trimethyl ammonium bromide, the interlayer spacing is obviously increased, the hydrophobic property and the cation exchange capacity are excellent, negative charges on the surface of sludge colloid can be efficiently neutralized, a double-electrode-layer structure can be destroyed, and part of bound water can be released; ferric hydroxide deposited on the surface serves as amphoteric metal hydroxide, further compresses double electric layers through electric neutralization, forms an amorphous net structure and serves as a high-efficiency adsorption flocculation net to capture fine sludge particles; under the synergistic effect of the powder and cationic polyacrylamide, efficient removal of water combined with sludge and water in cells is achieved, and the dual purposes of deep dehydration and mud cake volume reduction are achieved.

The invention discloses a preparation method of a composite phase change material, a thermal-insulation and antibacterial fabric and a preparation method thereof, and belongs to the field of functional textile fabrics and preparation thereof. The composite phase change material provided by the invention can be applied as a coating finishing component, and the preparation method comprises the following steps: taking polystyrene microspheres as a core, and forming a composite precursor through dopamine self-polymerization coating; and compounding the composite precursor with a layered double-metal hydroxide, and calcining to obtain the carbon microsphere supported layered double-metal oxide material with a hollow structure, and mixing the carbon microsphere supported layered bimetal oxide material with paraffin, and loading to obtain the carbon microsphere supported layered bimetal oxide material. The textile fiber fabric provided by the invention has excellent thermal insulation and antibacterial characteristics, is good in comfort, and has wide application prospects in industrial production and clothing application.

The invention discloses a p-region metal doped layered double-metal hydroxide electrode as well as a preparation method and application thereof. The p-region metal doped layered double-metal hydroxide electrode comprises a metal substrate and a p-region metal doped layered double-metal hydroxide catalyst deposited on the metal substrate, the p-region metal doped layered double-metal hydroxide catalyst comprises a p-region metal and a layered double-metal hydroxide; and the p-region metal is selected from one or more of aluminum, gallium, tin and indium. The preparation method can be completed within one minute at least through a simple, controllable and mild one-step electrodeposition method, the prepared p-region metal-doped layered double-metal hydroxide electrode is adjustable in size and shape, can be used as an OER anode to meet the requirements of different electrolytic bath specifications in practical application, is used for water electrolysis for hydrogen production, and has a wide application prospect. The activity and the stability of integral hydrogen production through water electrolysis can be improved, and the application potential is huge.