411 results about "Solvothermal reaction" patented technology

The invention discloses a preparation process of a composite rotating wheel for adsorption and dehumidification in a low-dew-point environment, which comprises the following steps: adding metal salt into a solution of a mixed organic ligand, adding an organic solvent, mixing with water, completely dissolving, carrying out solvothermal reaction, cooling to remove unreacted monomers and impurities, cleaning, and drying to obtain an MIL-101 (Cr) precursor adsorption material; the method comprises the following steps: dipping an adsorption material in different hygroscopic salt solutions to obtain a modified adsorption material; carrying out activating treatment; preparing the activated MIL-101 (Cr) adsorption material into slurry, coating the surface of glass fiber paper with the slurry, drying the glass fiber paper, and feeding the glass fiber paper into a rotating wheel; according to the present invention, the regular pore channel of MIL-101 (Cr) is adopted as the carrier so as to uniformly disperse the hygroscopic salt, such that the capture efficiency of the water molecules under the low humidity is enhanced, and the equilibrium adsorption capacity and the adsorption dynamic performance of the material under the low dew point environment are significantly improved;

The invention belongs to the technical field of electro-catalysis water decomposition, and relates to a self-supporting W-NiCoP / NF composite material and a preparation method and application thereof. Cobalt salt, terephthalic acid, acetic acid and foamed nickel are subjected to a first solvothermal reaction, and defect type Co-MOF / NF is obtained; immersing the defect type Co-MOF / NF into a tungstate solution, and then carrying out a second solvothermal reaction to obtain a defect type W-Co-MOF / NF precursor; and carrying out phosphating heat treatment on the defect type W-Co-MOF / NF precursor and a phosphorus source in an inert atmosphere to obtain the W-Co-MOF / NF composite material. According to the preparation method disclosed by the invention, the tungsten-doped nickel-cobalt bimetallic phosphide with rich defect structures is successfully constructed on the foamed nickel substrate through a step-by-step solvothermal and gas-phase phosphating strategy, so that organic combination of a bimetallic synergistic effect and defect engineering is realized; the prepared self-supporting composite material has more active sites, a better electronic structure regulation effect and better stability.

The application relates to an acetic acid-regulated sodium metaaluminate-doped calcium-aluminum-phosphorus defluorination material based on eggshell, a preparation method and application thereof, and belongs to the technical field of defluorination water treatment. The method is as follows: eggshell powder, a phosphorus source and sodium metaaluminate are added into a mixed solvent composed of acetic acid and water, mixed and dispersed to form a uniform reaction system; the pH of the reaction system is adjusted to be alkaline; the adjusted reaction system is transferred into a closed reaction container to perform a solvothermal reaction; after the reaction is completed, the obtained solid product is separated and washed; and the washed product is dried. In the application, acetic acid is used for regulating the dissolution and conversion of the eggshell calcium source and the material crystallization process, sodium metaaluminate is used for introducing aluminum components and adjusting the material structure, so as to construct an Al-Ca-P synergistic defluorination system. The obtained material can be used for removing fluorine ions in fluorine-containing water bodies. The application has the dual characteristics of resource utilization of waste eggshells and preparation of defluorination functional materials, and has the advantages of simple process, easily-obtained raw materials and high application value.

The present application relates to the technical field of carbon material preparation, and particularly relates to a preparation method of nitrogen-doped ultrathin nanosheet support microspherical carbon material. The preparation method of the microspherical carbon material comprises the following steps: mixing gallium salt, zinc salt, carbon precursor, amine compound and water, and performing a solvothermal reaction to obtain deep red powder solid; and then performing calcination on the deep red powder solid in an inert atmosphere, and performing acid washing, water washing and drying to obtain the microspherical carbon material. The residual template agent after calcination can be removed completely by using dilute hydrochloric acid, thereby avoiding the use of strong corrosive reagents such as HF, KOH or NaOH. The method realizes batch production of the synthesis of the nitrogen-doped ultrathin nanosheet support microspherical carbon material, is simple to operate, stable in process, and regular in product morphology, and the amount of gallium salt and amine compound is reduced. The Pd(OH)2 / C catalyst prepared by using the material as a carrier shows excellent catalytic activity in the hydrogenolysis debenzyl reaction of a cage-shaped substrate.

This application provides a KVOH nanomaterial, its preparation method, and an aqueous zinc-ion battery to address the technical problem of low performance of vanadium pentoxide cathode materials in the prior art. The KVOH nanomaterial provided in this application is obtained by a solvothermal reaction in an aqueous ethylene glycol solution. The introduction of potassium ions in the reaction expands the ion transport channels between the electrode material layers, improving the cycle performance of the battery. At the same time, the introduction of tetravalent vanadium also increases the specific capacity of the battery, thereby solving the technical problem of low performance of vanadium pentoxide cathode materials in the prior art.

The application discloses a P and O co-doped FeNiRuOx nano catalyst and a preparation method and application thereof, relates to the technical field of electrocatalytic materials, and the catalyst takes Fe, Ni and Ru as metal active centers, reconstructs a surface electronic structure through P and O double anion co-doping, and forms a polygonal nano structure, wherein the mass fraction ranges of Fe, Ni, Ru and P are 5.0-6.0%, 75-78%, 11-12% and 6.5-7.0% respectively. The preparation method comprises the following steps: taking iron acetylacetone, nickel acetylacetone and ruthenium chloride trihydrate as metal sources, synthesizing a precursor through a solvothermal reaction, and realizing P and O co-doping through a sodium hypophosphite assisted solid-phase phosphorization process, and the preparation process is mild. The synthesized catalyst has unique structural advantages, the formed polygonal nano structure has a large specific surface area and rich grain boundary defects, more active sites are exposed, and convenient channels are provided for the mass transfer of reactants and products. The synergistic effect among the polymetals further enhances the catalytic performance.

The application discloses a preparation method of a PPSU-based ZIF-8 double-layer membrane and application of the double-layer membrane in hydrogen separation, and belongs to the technical field of gas separation membranes. The preparation method is as follows: ZIF-8 seeds are embedded in a PPSU matrix solution, then are spin-coated onto the surface of an alpha-Al2O3 carrier to obtain a PPSU-based membrane, and secondary growth of the membrane is carried out through a solvothermal reaction, so that the seeds grow epitaxially, a continuous, dense and defect-free ZIF-8 separation layer is formed on the surface and the near-surface region of the carrier substrate, and the reaction is ended to obtain the double-layer membrane. Through the seed embedding strategy, the interface bonding force between the ZIF-8 layer and the PPSU substrate is significantly enhanced, and the generation of interface defects is effectively inhibited. The double-layer membrane has high permeation flux and high separation selectivity for a H2 / CO2 system, and is particularly suitable for hydrogen separation and purification processes.

The invention discloses a naphthoquinone-based gas sensitive material, a preparation method and application of the naphthoquinone-based gas sensitive material in an ammonia gas sensor, and belongs to the technical field of gas sensors. The material is composed of divalent metal ions such as copper, nickel and cobalt and a polysubstituted naphthoquinone organic ligand, forms a one-dimensional chain structure, has a high specific surface area, an ordered electron channel and excellent molecular recognition capability, and can detect toxic gases such as ammonia gas at room temperature with high sensitivity. Macroscopic preparation of the material can be realized through solvothermal one-step reaction. Compared with the prior art, the one-dimensional coordination structure and ligand site engineering synergistically improve the carrier transport and molecular recognition capability, can realize continuous, real-time and selective detection of ammonia gas under complex working conditions, and has the advantages of high yield, large-scale preparation and excellent device application prospect.

The application discloses a method for efficiently and preferentially separating and recovering lithium from waste lithium batteries. The method comprises the following steps: taking waste lithium battery positive black powder as raw material, adding a lithium removal additive to perform a solvothermal reaction, removing lithium from the positive black powder, and then separating a lithium-containing solution from the obtained reaction mixture; then, the lithium-containing solution is sequentially subjected to impurity removal and concentration treatment to obtain a lithium-rich solution; and finally, lithium ions in the lithium-rich solution are converted into a lithium-containing product. The method can realize deep removal of lithium and selective separation of lithium ions and other metal ions in the leaching process of the positive black powder, and has the advantages of simple process, short lithium recovery process, high yield, and less consumption of acid and alkali.

The invention belongs to the technical field of energy materials, and discloses a preparation method of a zinc-based porous organic polymer coating and application of the zinc-based porous organic polymer coating to protection of a zinc negative electrode. Reaction raw materials of the zinc-based porous organic polymer provided by the invention are cheap soluble zinc salt and pyromellitic acid, and the zinc-based porous organic polymer is obtained through a one-step solvothermal reaction. Polyvinylidene fluoride (PVDF) is adopted as a binder, and Zn-POPs is loaded on the surface of the zinc negative electrode in the modes of spin coating, blade coating, spray coating and the like. According to the Zn-POPs protective coating provided by the invention, the concentration distribution of zinc ions on an interface can be dynamically regulated and controlled by an unsaturated coordinate bond, and a dendrite-free zinc negative electrode is realized. Meanwhile, the coating can isolate direct contact between the electrolyte and the negative electrode, so that corrosion of the zinc negative electrode and generation of byproducts are reduced; when the coating is applied to a symmetric battery and a total battery, the battery can show low polarization voltage and stable cycle performance, the advantages of the coating are further highlighted, and subsequent large-scale industrial production can be expected.

The invention discloses a Co-NiPc-MoS2 / MXene ternary composite material and a preparation method and application thereof.The preparation method comprises the following steps that after MXene powder is dispersed in deionized water, a sulfur source, a reducing agent and a molybdenum source are sequentially added and evenly dispersed, and a mixed solution A is obtained; dissolving metal phthalocyanine in absolute ethyl alcohol to obtain a mixed solution B; dropwise adding the mixed solution B into the mixed solution A to obtain a precursor solution; and carrying out solvothermal reaction on the precursor solution at the temperature of 160 to 200 DEG C, so as to obtain the Co-NiPc-MoS2 / MXene ternary composite material. The problem that conductivity, active sites and structural stability in an existing electrode material are difficult to consider at the same time is effectively solved. When the prepared composite material is used as a supercapacitor electrode, high specific capacitance and excellent rate capability are shown, and the comprehensive electrochemical performance of a supercapacitor is remarkably improved.

This invention belongs to the field of functional polymer composite materials technology, and more specifically relates to a titanium oxide cluster composite fiber membrane with broad-spectrum photoresponse, its preparation method, and its applications. The preparation method includes: using 3-fluorocatechol and titanate as reactants, a solvothermal reaction is carried out under an inert atmosphere to obtain trifluorocatechol-modified titanium oxide cluster crystals; then, these crystals are dissolved with thermoplastic polyurethane particles in an organic solvent to prepare a composite spinning solution, which is then electrospun and dried to obtain the composite fiber membrane. In this fiber membrane, the titanium oxide clusters are uniformly dispersed at the nanoscale, forming a three-dimensional porous network structure with a diameter of 100-1000 nm, exhibiting broad-spectrum strong absorption (300-1000 nm), superhydrophobicity, and excellent photothermal properties. This invention effectively solves the problem of inorganic nanoclusters agglomeration in organic matrices through surface modification, achieving synergistic antibacterial effects through photothermal and photocatalytic processes, and has broad application prospects in medical protection, intelligent thermal management textiles, and environmental purification.

This invention discloses a carbon-coated Fe-Co-Ni-B magnetic micron alloy particle, its preparation method, and its application. The method includes the following steps: dissolving iron acetylacetonate, cobalt acetylacetonate, and nickel acetylacetonate in anhydrous ethanol, then adding cyclopentylboric acid and dissolving it to obtain a mixed solution; subjecting the mixed solution to a solvothermal reaction; and after post-treatment to obtain boron-doped pre-decomposition precursor powder. A glucose aqueous solution is then added dropwise to the pre-decomposition precursor powder under stirring and mixed uniformly to ensure uniform adsorption and coating of the glucose solution on the powder surface. The powder is then dried to obtain a glucose-coated composite precursor. The composite precursor is subjected to programmed temperature heat treatment under an inert or weakly reducing atmosphere to obtain carbon-coated Fe-Co-Ni-B magnetic micron alloy particles with a core-shell structure. This invention successfully prepares a magnetic composite material possessing high saturation magnetic properties, good chemical stability, and controllable magnetic properties.

The application discloses a novel proton battery positive electrode material and a preparation method thereof. Iron source solution and phosphorus source solution are respectively prepared through an organic solution, and then the two solutions are mixed to perform a solvothermal reaction. After that, the product obtained in the reaction is washed and dried to obtain the novel proton battery positive electrode material. The material can be used to prepare a proton battery positive electrode sheet. The novel proton battery positive electrode material prepared by the application is a nanoparticle, the main component of which is iron phosphate. The particle morphology is uniform, and the specific surface area is large. The size of the particle is 50.0-200.0 nm. The proton battery prepared by using the novel proton battery positive electrode material has good electrochemical performance. The preparation method provided by the application is simple in process, raw materials are easy to obtain, and is suitable for large-scale industrial production.

The invention relates to a rare earth metal tungstate nanosheet material as well as a preparation method and application thereof. The rare earth metal tungstate nanosheet material comprises a PO4 < 3->-LnWO4 nanosheet, and Ln is at least one of lanthanide series rare earth metals. The preparation method comprises the following steps: dissolving phosphotungstic acid and a precursor in a solvent, and stirring to form a solution; adding an organic amine ligand, and stirring to form a transparent solution; performing solvothermal reaction on the solution; and centrifuging, washing with ethanol and drying to obtain the rare earth metal tungstate nanosheet material. A solvothermal reaction method is adopted to successfully construct a two-dimensional sheet structure material formed by interweaving nanowires, the material has high specific surface area, abundant pores and excellent structural stability, and the problems that a traditional photocatalytic material is single in structure and insufficient in active site are effectively solved. The photocatalyst shows excellent degradation capability on various typical antibiotic pollutants, breaks through the limitation that most photocatalytic materials are only effective on single pollutants, and realizes relatively high pollutant degradation universality.

The invention discloses a preparation method of a CuInS2 / FeS2 wood mildew-proof antibacterial agent, which comprises the following steps: dissolving cuprous chloride, indium chloride tetrahydrate, ferric trichloride hexahydrate and thiourea or thioacetamide in ethylene glycol, and carrying out one-step solvothermal reaction and calcination to obtain a CuInS / FeS composite antibacterial agent; the material has triple effects of photo-thermal, photocatalysis and copper ion slow release, and can inhibit mildew and decay fungi on the surface of wood under the condition of visible-near infrared illumination or no illumination. NH4VO3 and 2-methylimidazole are added into a reaction system and calcined in an ammonia-containing atmosphere, so that a V < 5 + > / V < 4 + > redox pair can be formed on the surface, near-infrared absorption is further widened, electron-hole recombination is delayed, and long-acting antibiosis under weak light is realized. The process is simple, does not contain chromium and arsenic heavy metals, and is suitable for environmental protection of wood materials.

This invention belongs to the field of analytical detection technology and relates to a method for detecting estradiol using a combination of organometallic framework enrichment and enzyme-linked immunosorbent assay (ELISA). A magnetic organometallic framework solid-phase extractant is used to enrich estradiol in the sample, followed by detection of the enriched estradiol using ELISA. The magnetic organometallic framework solid-phase extractant is prepared by subjecting mercaptoacetic acid-modified Fe3O4 particles, zirconium salt, and 2-amino-terephthalic acid to a solvothermal reaction at 110–130°C for 22–26 hours. The detection method provided by this invention has advantages such as short detection time, high sensitivity, good specificity, and high accuracy, thereby enabling the detection of trace amounts of estradiol in environmental water samples.

The present application relates to the technical fields of catalyst design and ammonia synthesis, and discloses a preparation method of a pyrazole trinuclear cobalt-based catalyst, which comprises the following steps: step 1, dissolving a metal cobalt compound in water to obtain a first mixed solution, dissolving a pyridine molecule in a mixed organic solution to obtain a second mixed solution, mixing and stirring the first mixed solution and the second mixed solution, and then transferring the mixture to a high-vacuum reaction tube, and then placing the high-vacuum reaction tube in an oil bath to perform a solvothermal reaction; step 2, after the solvothermal reaction is completed, washing, centrifuging and drying the obtained substance to obtain a trinuclear cobalt-based compound powder. The present application uses nitrate as a nitrogen source, a pyrazole cobalt-based compound as a catalyst, and a mixture of potassium sulfate and potassium nitrate as an electrolyte, and effectively synthesizes ammonia through electrochemical reduction. The catalyst exhibits high Faraday efficiency and high yield under high-concentration nitrate conditions.

A kind of lithium battery electrolyte concentration and moisture fluorescent probe and fluorescent spectrum detection method, metal zirconium salt and organic ligand are dissolved in mixed solvent of organic solvent and water respectively, after heating and carrying out solvothermal reaction, cooling to room temperature, zirconium-based MOF is obtained by separation and purification.The zirconium-based metal organic framework material (MOF) with good specificity fluorescent recognition characteristic for lithium hexafluorophosphate is prepared in the application, which is used for fluorescent probe to detect the concentration and moisture content of lithium hexafluorophosphate in lithium ion battery electrolyte;The application significantly reduces the addition amount of detection agent in electrolyte, has obvious effect, low cost, and has no side effect on the electrochemical performance of electrolyte.

The application discloses a preparation method of an alumina-supported copper-cobalt bimetallic catalyst. The preparation method comprises the following steps: (1) a certain amount of cobalt salt, copper salt, aluminum salt, urea and ammonium fluoride are dissolved in an alcohol solvent to obtain a precursor through a solvothermal reaction; and (2) the precursor is reduced by hydrogen to obtain the alumina-supported copper-cobalt bimetallic catalyst. Compared with the prior art, the copper-cobalt bimetallic catalyst prepared by the method has excellent catalytic activity on the reaction of CO2 hydrogenation to ethanol, and can significantly improve the selectivity of ethanol product in the reaction.

The invention belongs to the technical field of advanced materials and glucose detection, and relates to a 2D-MOF and MXene composite material, a printing type enzyme-free glucose sensor as well as a preparation method and application of the printing type enzyme-free glucose sensor. The preparation method of the composite material comprises the following steps: carrying out amination modification treatment on the MXene material; the MXene material subjected to amination modification treatment, nickel salt, BPY, TCPP and PVP are added into a mixed solvent of ethyl alcohol and DMF to be evenly mixed, and then a solvothermal reaction is conducted. The composite material has high catalytic activity, excellent conductivity and good dispersity, can be firmly attached to a flexible substrate, is high in stability, and can realize rapid and repetitive detection of glucose. The material can be prepared into conductive ink with good rheological property, is suitable for a printing process, can be used for preparing a wearable enzyme-free glucose sensor with high sensitivity and interference resistance, and has large-scale low-cost production potential.

The application discloses a high-entropy alloy type FeS2@C composite material and a preparation method and application thereof, and belongs to the technical field of entropy alloy material preparation. The high-entropy alloy type FeS2 / C composite material is prepared from a raw material of an iron source, metal soluble salt, sublimed sulfur and a carbon material dispersion liquid, and then ethylene glycol solution is added, stirring is performed until dissolution, and hydrothermal reaction is performed at 180-200 DEG C. The high-entropy alloy type FeS2 / C composite material is prepared by the solvent thermal reaction of the application, the synthesized FeS2 / C material is uniform in particle size, small in particle size and good in dispersibility. The application improves the utilization rate of reactants, shortens the reaction time, improves the yield, and has the advantages of simple operation, low requirement on reaction equipment, mild conditions, mass production and the like. The high-entropy alloy type FeS2@C composite material with excellent performance is prepared by a simple and efficient preparation method.

The application belongs to the technical field of electrode material recycling, and provides a solvothermal reaction regeneration and repair method for waste lithium iron phosphate positive electrode material and application. The steps of the regeneration and repair method comprise the following: after stirring and mixing the waste lithium iron phosphate and N-methyl pyrrolidone, sequentially performing drying and sieving to obtain a positive electrode active material; mixing the positive electrode active material, a lithium source, a reducing agent, an organic acid and a solvent to perform solvothermal reaction to obtain a lithium-supplemented lithium iron phosphate positive electrode active material; and performing annealing treatment on the lithium-supplemented lithium iron phosphate positive electrode active material in a reducing gas atmosphere to obtain a structure-repaired lithium iron phosphate material. The technical scheme effectively improves the electrochemical performance of the waste lithium iron phosphate, is simple in operation, low in energy consumption and high in efficiency, provides a new idea for regeneration and repair of the waste lithium iron phosphate battery positive electrode material, and has great application prospect.

This application discloses a method for preparing recycled positive electrode active material, comprising the steps of: adding waste lithium-ion battery positive electrode material sequentially to an aqueous solution of 2-hydroxypropionic acid and / or aspartic acid and an aqueous solution of ascorbic acid and / or tyrosine for reaction; then filtering, removing residue, and adjusting the valence metal ions and M in the leachate. n+ The molar ratio is adjusted, pH is adjusted, and the mixture is heated and concentrated by evaporation to form a gel-like substance. The gel-like substance is then calcined in steps, and then immersed in a solution containing a coating agent for a solvothermal reaction. After drying and low-temperature sintering, the regenerated positive electrode active material is obtained. The valuable metal ions include Ni. 2+ Co 2+ Mn 2+ Li + and M n+ M is one or more of W, Zr, Al, B, Sr, Nb, and Ta, and n is 2, 3, 5, or 6; the coating agent includes a coating precursor and a phosphorus compound. This application also provides a regenerated positive electrode active material.

The application discloses a preparation method of Al / NH4CuF3 metastable intermolecular complex. The method is characterized in that: firstly, NH4CuF3 with a nano-network structure is prepared through a solvothermal reaction; then, n-Al is filled into the nanopore channels of the NH4CuF3 in a manner of ultrasonic-assisted dispersion, so as to form n-Al / NH4CuF3 MICs with good dispersity. The n-Al / NH4CuF3 MICs prepared by the method can etch a passivation layer and reduce the reaction energy barrier of the aluminum powder and an oxidizing agent, depending on the low-temperature decomposition of the NH4CuF3 to release F and the thermal decomposition of the NH4CuF3 to generate HF. In addition, a large amount of gaseous products are generated by the decomposition of the NH4CuF3, so that the generation of a reaction sintering phenomenon is relieved, and the combustion efficiency of the n-Al is improved.

The invention relates to a pyridine compound modified CuAu bimetallic nano hollow structure catalyst, and preparation and application thereof, and belongs to the technical field of electro-catalysis. The preparation method comprises the following steps: dropwise adding a chloroauric acid solution into hollow Cu2O nano-particles to obtain a core-shell structure with gold nano-particles loaded on the surfaces of the hollow Cu2O nano-particles, then carrying out solvothermal reaction to obtain hollow CuAu nano-particles, and then adding a pyridine organic modifier to obtain the hollow CuAu nano-particles. The catalyst prepared by the invention has a Cu < + > / Cu0 at Au functionalized catalytic interface, realizes differential adsorption of * CO intermediates and subsequent hydrogenation reaction process, and promotes asymmetric * CO-* CHO coupling, so that the activity and selectivity of ethanol products are remarkably improved, and the Faraday efficiency can reach 76%.

The invention discloses a preparation method and application of a porous iridium nano-metal catalyst, and belongs to the field of material synthesis and electro-catalysis. Iridium acetylacetonate and copper acetylacetonate are used as precursors, an IrCu alloy nanosphere precursor is prepared through solvothermal reaction in an ethylene glycol and surfactant system, copper is removed through acid etching, and the porous iridium nano spherical catalyst (Ir-NS) is obtained. The catalyst has a three-dimensional porous spherical structure, active sites are concentrated on the surfaces of nanospheres and the edges of the walls of internal mesopores, catalytic active sites are enhanced due to the iridium nanosphere structure and uniform site exposure density, oxygen bubbles are quickly released, and the active sites are prevented from being covered by the bubbles. In an acid medium and proton exchange membrane water electrolysis anode oxygen evolution reaction, the catalyst shows low overpotential and long-term operation stability under low iridium loading capacity. The method is simple in process and low in cost, does not need an additional hard template, and has a good industrial application prospect.

The invention discloses a zinc thiophosphate material with a yolk double-shell structure as well as a preparation method and application thereof, and relates to the technical field of sodium ion batteries. The preparation method comprises the following steps: firstly, preparing a ZIF-8 precursor template through a zinc source and solvothermal reaction of 2-methylimidazole, and then sequentially carrying out coating, template etching, synchronous carbonization and vulcanization treatment and phosphorus vulcanization treatment on the ZIF-8 precursor template to finally obtain the ZnPS3 / NC-C material with the yolk double-shell structure and excellent electrochemical performance. Compared with a traditional transition metal thiophosphate preparation process, the method is safer in process, and the yolk double-shell morphology of the metal phosphorus sulfide can be accurately regulated and controlled. Compared with pure zinc thiophosphate prepared by a traditional process, the prepared ZnPS3 / NC-C material with the yolk double-shell structure has the characteristics of hollow and porous characteristics, high specific surface area and structural stability, and shows relatively high first charge-discharge efficiency and excellent cycle stability when being used as a sodium-ion battery negative electrode material.

The invention discloses a copper-zinc double-active metal site adsorbent with atom dispersion, a preparation method thereof and application of the copper-zinc double-active metal site adsorbent in adsorption of sulfonamide antibiotics. The preparation method comprises the following steps: carrying out solvothermal reaction on a methanol solution containing copper acetylacetonate, zinc acetate and 2-methylimidazole in a mass ratio of (0.12-0.24): (0.8-0.9): (1.3-1.4), taking a solid after the reaction is ended, washing, drying, and calcining in an inert atmosphere to obtain the copper-zinc double-active metal site adsorbent with atom dispersion. The adsorbent has the following prominent advantages that copper and zinc are anchored to a nitrogen-rich carbon skeleton in a monatomic form, copper and copper diatoms exist on the surface, and the utilization rate is high; the synergistic effect of the nitrogen-doped carbon matrix and active sites of copper and zinc endows the material with an adjustable electronic structure; the porous carbon structure provides a stable anchoring point for metal atoms, metal dissolution is effectively inhibited, and secondary pollution is avoided.

This invention discloses an in-situ iodine-generating water purification material, a water purification method, and a method for regenerating the water purification material, solving the technical problems of poor storage stability of elemental iodine, uncontrollable addition, and potential secondary pollution in existing technologies. The in-situ iodine-generating water purification material includes a catalyst and an oxidant, which undergo a catalytic oxidation reaction in organic wastewater to generate elemental iodine; wherein the catalyst includes a metal oxyiodide generated by a solvothermal reaction of a soluble bismuth salt and a soluble alkali metal iodide. The water purification method includes the steps of adding the catalyst and oxidant from the aforementioned in-situ iodine-generating water purification material to the organic wastewater. The method for regenerating the aforementioned in-situ iodine-generating water purification material includes the steps of adding the deactivated water purification material to an iodide solution, reacting for a period of time, and then collecting the solid to obtain the regenerated catalyst.