WO2021135252A1 - Matériau composite unidimensionnel oxyde/carbure de métal et son procédé de préparation - Google Patents

Matériau composite unidimensionnel oxyde/carbure de métal et son procédé de préparation Download PDF

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WO2021135252A1
WO2021135252A1 PCT/CN2020/108936 CN2020108936W WO2021135252A1 WO 2021135252 A1 WO2021135252 A1 WO 2021135252A1 CN 2020108936 W CN2020108936 W CN 2020108936W WO 2021135252 A1 WO2021135252 A1 WO 2021135252A1
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dimensional
preparation
carbide composite
composite material
metal
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PCT/CN2020/108936
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张晓伟
王戈
高鸿毅
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苏州阿德旺斯新材料有限公司
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Priority claimed from CN201911410023.9A external-priority patent/CN111129468B/zh
Priority claimed from CN201911419839.8A external-priority patent/CN111105935B/zh
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Publication of WO2021135252A1 publication Critical patent/WO2021135252A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/20—Carbon compounds
    • B01J27/22—Carbides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08—Heat treatment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/30—Electrodes characterised by their material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention claims the priority of a Chinese patent application filed in the Chinese Patent Office with the application number 201911410023.9 and the title of the invention "a one-dimensional metal oxide/carbide composite material and its preparation method". The entire content of the application is approved The citation is incorporated in the present invention.
  • the present invention claims the priority of a Chinese patent application filed in the Chinese Patent Office with the application number 201911419839.8 and the title of the invention "a one-dimensional metal oxide/carbide composite material and its preparation method”. The entire content of the application is approved The citation is incorporated in the present invention.
  • the invention relates to the field of inorganic nano functional material synthesis, in particular to a one-dimensional metal oxide/carbide composite material and a preparation method thereof.
  • Porous carbon materials have very important applications in the fields of electrocatalysis, batteries, capacitors, sensors, and gas adsorption due to their large specific surface area, good adsorption and conductivity.
  • the simple carbon material lacks active sites that can be directly utilized, which results in that it is usually used as a carrier material and needs to be combined with other active materials to achieve a wider range of applications.
  • the commonly used method is to introduce active materials, mainly including noble metals, transition metal oxides, etc., and composite them with porous carbon materials through a loading method to improve their catalytic, adsorption and electrochemical activities.
  • the synthetic methods of such supported complexes are usually more complicated, the loading of active substances is generally small, the active sites are few, and the dispersibility is also poor, which affects the improvement of its comprehensive performance.
  • pure porous carbon materials are relatively stable in an inert environment, but their thermal stability is significantly reduced in an oxygen environment. If the porous carbon material is combined with the metal active center to generate metal carbide, it can improve its stability and activity while ensuring its excellent structural performance and good electrical conductivity. Moreover, when the metal carbide is combined with other metal materials to form a metal/metal oxide/metal carbide composite material, the synergy between them can further improve its electrochemical properties.
  • the synthesis of carbides usually adopts high-temperature thermal reduction methods. The high-temperature environment used generally needs to reach above 1000°C, and the energy consumption is large. The resulting carbides are often bulk materials, which do not have good catalysis, adsorption and electricity. Chemical activity. However, although the one-dimensional porous carbide with higher activity can be obtained by using the template method, the synthesis process is very complicated.
  • Metal-Organic Frameworks are a novel porous solid material composed of metal ions or metal clusters and organic ligands. Due to the porosity, high specific surface area, tailorability, multiple active sites and other characteristics of this type of material, it has extremely important applications in the fields of gas storage, carbon dioxide capture, molecular separation, catalysis, drug or other material carriers, etc. . According to the different spatial dimensions of the structure, metal-organic framework materials can generally be divided into one-dimensional, two-dimensional and three-dimensional metal-organic framework materials.
  • low-dimensional MOFs materials such as one-dimensional MOFs
  • MOFs materials not only have the intrinsic characteristics of MOFs materials, but also have the structural characteristics of low-dimensional nanomaterials, which often exhibit more unique physical and chemical properties, such as high long diameter. Ratio, abundant surface active sites, etc.
  • the purpose of the present invention is to provide a one-dimensional metal oxide/carbide composite material and a preparation method thereof.
  • the preparation method provided by the present invention uses a one-dimensional metal organic framework material as a precursor for the first time, and through one-step calcination and pyrolysis, a one-dimensional metal oxide/carbide composite material can be obtained; the obtained one-dimensional metal oxide/carbide The composite material still maintains a good one-dimensional morphology, and has a large specific surface area, high dispersion, more exposed active sites and good electrical conductivity; the preparation method is simple, low energy consumption, low raw material cost, and easy to scale up production.
  • Metal-organic framework materials have both dispersed metal sites, large specific surface area, and rich porous structure.
  • the organic ligands usually contain carbon and oxygen, especially one-dimensional MOFs, which also have low-dimensionality.
  • the material has excellent physical and chemical properties. Therefore, it is of great practical significance to use one-dimensional MOFs as precursors to obtain one-dimensional metal oxide/carbide composite materials through a simple, environmentally friendly and low energy consumption method.
  • an embodiment of the present invention provides a method for preparing a one-dimensional metal oxide/carbide composite material.
  • the preparation method includes the following steps: calcining the one-dimensional metal organic framework material; wherein, calcining The temperature is 200-600°C.
  • the calcination temperature is 300-500°C; optionally 400°C.
  • the calcination time is 10-200 min; optionally 60-150 min.
  • the one-dimensional metal organic frame material includes a one-dimensional linear metal organic frame material, a one-dimensional tubular metal organic frame material, a one-dimensional rod-shaped metal organic frame material, or a one-dimensional strip
  • the one-dimensional metal-organic frame material includes a one-dimensional strip-shaped metal-organic frame material.
  • the one-dimensional strip-shaped metal organic frame material has an aspect ratio ⁇ 10, and has a dimension of 50-200 nm in the width direction.
  • the one-dimensional strip-shaped MOFs not only have the good electrical conductivity and mechanical properties of one-dimensional nano-materials, but also have quasi-two-dimensional characteristics, produce metal active sites with lower surface energy and higher exposure, and are useful in catalysis and other aspects. Has more favorable structural characteristics.
  • the calcination is performed in a tube furnace.
  • an auxiliary gas is introduced during calcination, and the auxiliary gas includes one or more of nitrogen, oxygen, air, helium, hydrogen, and argon.
  • the temperature is increased to the calcination temperature at a heating rate of 2-20° C./min.
  • the one-dimensional strip-shaped metal organic framework material is prepared by a preparation method including the following steps: mixing a transition metal salt with a solvent, and adding a solution of an organic ligand and a base After mixing, transfer to the reactor, treat at 160-180°C for 5-20h, and dry.
  • the molar ratio of the metal ion to the organic ligand is 1:1-2.
  • the treatment is performed at 165-175°C for 5-15 hours; optionally, the treatment is performed at 170°C for 8-15 hours.
  • the transition metal salt includes Ni(NO 3 ) 2 , Co(NO 3 ) 2 , Fe(NO 3 ) 2 , Fe(NO 3 ) 3 , Mn(NO 3) ) 2 , NiCl 2 , CoCl 2 , FeCl 2 , FeCl 3 , MnCl 2 , NiCl 2 , one or more of VCl 3 ; optionally, the transition metal salt includes Ni(NO 3 ) 2 , or Ni( A mixture of NO 3 ) 2 and Co(NO 3 ) 2 ; further alternatively, when the transition metal salt is a mixture of Ni(NO 3 ) 2 and Co(NO 3 ) 2 , the ratio of Ni 2+ and Co 2+ The molar ratio is 1-10:1-10.
  • the solvent includes one or more of water, methanol, ethanol, ethylene glycol, propylene glycol, butylene glycol, and N,N-dimethylformamide; optional Preferably, the solvent is water.
  • the organic ligand includes one or more of terephthalic acid, trimellitic acid, 2'-methylimidazole, 4,4'-diphthalic acid
  • the organic ligand is 4,4'-biphthalic acid.
  • the alkali includes one or more of sodium hydroxide, potassium hydroxide, triethylamine, and sodium formate; optionally, the alkali is sodium hydroxide.
  • the embodiment of the present invention also provides a one-dimensional metal oxide/carbide composite material prepared by the above preparation method.
  • the one-dimensional metal oxide/carbide composite material has a hollow structure.
  • the one-dimensional metal oxide/carbide composite material has a tubular structure.
  • the embodiment of the present invention also provides the application of the above-mentioned preparation method and the above-mentioned one-dimensional metal oxide/carbide composite material in electrocatalysis, battery, capacitor, sensor or gas adsorption.
  • the method for preparing a one-dimensional metal oxide/carbide composite material uses a one-dimensional metal organic framework material as a precursor for the first time, and generates a one-dimensional metal through a one-step pyrolysis process at a specific temperature.
  • Metal oxide/carbide composite material the obtained one-dimensional metal oxide/carbide composite material still maintains a good one-dimensional morphology, and has a large specific surface area, high dispersion, more exposed active sites and good Electrical conductivity; simple preparation method, low energy consumption, low raw material cost, and easy to scale up production.
  • Metal-organic framework materials have both dispersed metal sites, large specific surface area, and rich porous structure.
  • the organic ligands usually contain carbon and oxygen, especially one-dimensional MOFs, which also have low-dimensionality.
  • the material has excellent physical and chemical properties. Therefore, it is of great practical significance to use one-dimensional MOFs as precursors to obtain one-dimensional metal oxide/carbide composite materials through a simple, environmentally friendly and low energy consumption method.
  • the calcination of one-dimensional MOFs is divided into two stages: the first stage is the dehydration stage, since the metal organic framework is a porous material , The adsorbed water and bound water existing in the pores gradually evaporate during the heating process, and the temperature at this stage is in the range of 30-300°C; when the temperature continues to rise, the framework of MOFs begins to dissociate to produce metal oxides and carbides.
  • the higher the temperature and the longer the time, the more complete the dissociation, and the low temperature will cause the metal-organic framework structure to be incompletely cracked, and the resulting product will be impure; but at the same time, the increase in temperature will also cause the nanomaterials to shrink and agglomerate.
  • Spontaneous agglomeration of the obtained metal oxides/carbides cannot maintain the advantages of the original one-dimensional structure; therefore, controlling the temperature and time of the dissociation stage is very important for the morphology of the final product.
  • the method for preparing one-dimensional metal oxide/carbide composite materials selects one-dimensional strip-shaped MOFs and provides a method for preparing one-dimensional strip-shaped MOFs.
  • the selection of synthesis conditions especially the strict control of processing temperature and processing time, accelerates the speed of crystal nucleation and orientation growth, effectively preventing its edge self-assembly, thereby forming dispersed nano-ribbon metal with high aspect ratio Organic framework;
  • the obtained one-dimensional strip-shaped MOFs the length is in the micrometer scale, the width and thickness are in the nanometer scale, the aspect ratio is ⁇ 10, and the width direction has a certain scale (50-200nm), which has a one-dimensional nanomaterial While having good electrical conductivity and mechanical properties, it has quasi-two-dimensional characteristics, and other one-dimensional MOFs produce lower surface energy and higher exposure of metal active sites, and has more favorable structural characteristics in terms of catalysis.
  • the method for preparing one-dimensional metal oxide/carbide composite materials provided in the embodiments of the present invention can obtain different one-dimensional metal-organic framework materials by changing the metal source according to the needs of different scenarios, thereby obtaining one-dimensional metal-organic framework materials with different compositions.
  • Three-dimensional metal oxide/carbide composite material, the method is controllable and simple and easy to implement.
  • the one-dimensional metal oxide/carbide composite material provided in the embodiment of the present invention has a large specific surface area, high dispersibility, more exposed active sites and good conductivity. It is used in electrocatalysis, batteries, and capacitors. , Sensors, and gas adsorption fields have very good application prospects.
  • the one-dimensional metal oxide/carbide composite material has a hollow structure, and it is speculated that the one-dimensional strip-shaped MOFs formed a hollow structure after the edges were curled during the high-temperature calcination process.
  • FIG. 1 is a SEM (scanning electron microscope) image of the one-dimensional strip-shaped metal organic frame material prepared in Example 2 of the present invention.
  • Fig. 2 is an SEM image of a nickel-cobalt oxide/carbide composite material prepared in Example 2 of the present invention.
  • Fig. 3 is an XRD (X-ray diffraction) chart of the nickel-cobalt oxide/carbide composite material prepared in Example 2 of the present invention.
  • Fig. 4 is a graph showing the electrocatalytic oxygen evolution reaction result of the nickel-cobalt oxide/carbide composite material prepared in Example 2 of the present invention.
  • the raw materials used are all commercially available products.
  • 4,4'-biphthalic acid (CAS No. 787-70-2) was purchased from Aladdin Industrial Corporation with a purity of 97%.
  • a method for preparing a one-dimensional metal oxide/carbide composite material includes the following steps:
  • step a Put the one-dimensional strip-shaped metal organic frame material prepared in step a into a porcelain cup, transfer it into a tube furnace, and pass oxygen into it, raise it to 400°C at a temperature increase rate of 10°C/min, calcinate for 2h, and wait for cooling Afterwards, a fluffy black powder is obtained, which is a one-dimensional metal oxide/carbide composite material—nickel oxide/nickel carbide composite material.
  • a method for preparing a one-dimensional metal oxide/carbide composite material includes the following steps:
  • the SEM (Scanning Electron Microscope) picture of the one-dimensional strip-shaped metal organic framework material prepared above is shown in Figure 1.
  • Figure 1 is a nano strip-shaped structure with a length in the micrometer scale, and a width and thickness in the nanometer scale.
  • the aspect ratio is greater than or equal to 10, and has a certain scale (50-200nm) in the width direction; it has the characteristics of one-dimensional nanomaterial structure and quasi-two-dimensional characteristics.
  • step a Put the one-dimensional strip-shaped metal organic frame material obtained in step a into a porcelain cup, transfer it into a tube furnace, pass in air, raise the temperature to 400°C at a rate of 10°C/min, and calcinate for 2h, and wait for cooling. Then a one-dimensional metal oxide/carbide composite material—nickel cobalt oxide/carbide composite material is obtained.
  • the SEM image of the nickel-cobalt oxide/carbide composite material prepared above is shown in Figure 2. It can be seen from Figure 2 that the obtained nickel-cobalt oxide/carbide composite material has a good one-dimensional tubular structure, and it can be observed that it is composed of nanometers.
  • the particle composition is presumed to be the metal oxide/carbide nanoparticles produced by the one-dimensional nano-strip metal organic framework after being calcined at an appropriate temperature.
  • the nickel-cobalt oxide/carbide composite material prepared above is a one-dimensional material, and its XRD (X-ray diffraction) spectrum is shown in Fig. 3. From the XRD characteristic curve of Fig. 3, the characteristics of nickel-cobalt oxide and carbide can be observed There is no characteristic peak of the metal-organic framework material, which proves that the metal-organic framework is completely dissociated to obtain the metal oxide/carbide composite material under this synthesis condition.
  • a method for preparing a one-dimensional metal oxide/carbide composite material includes the following steps:
  • step a Put the one-dimensional strip-shaped metal organic frame material obtained in step a into a porcelain cup, transfer it into a tube furnace, blow in air, raise the temperature at a rate of 20°C/min to 500°C, and calcinate for 1h, and wait for cooling. Then a one-dimensional metal oxide/carbide composite material—nickel cobalt oxide/carbide composite material is obtained.
  • a method for preparing a metal oxide/carbide composite material includes the following steps:
  • Embodiment 2 The main difference from Embodiment 2 lies in: the synthesis conditions of the metal organic framework material are different, and the details are as follows:
  • the synthesis temperature has a great influence on the morphology of MOFs, and the synthesis time has a great influence on the crystallinity or aspect ratio of MOFs.
  • the size of the obtained metal organic framework material is about 1 ⁇ m, which is a flower-like structure composed of nanobelts (about 50 nm in width and about 20 nm in thickness).
  • the obtained material is a sea urchin-like metal organic framework material composed of nanorods.
  • the strip-shaped MOFs provided in Examples 1-3 are more dispersed, have a larger specific surface area, and expose more metal active sites, and have more favorable structural characteristics in terms of catalysis.
  • step a Put the flower-like structure metal organic frame material obtained in step a into a porcelain cup, transfer it into a tube furnace, pass in oxygen, and raise it to 400°C at a heating rate of 10°C/min and calcinate it for 2h. After cooling, it will be obtained.
  • the nickel-cobalt oxide/carbide composite material obtained in Comparative Example 1 is nanoflower-like. Compared with the flower-shaped metal oxide/carbide composite material, the tubular metal oxide/carbide composite material provided in Examples 1-3 has better structural characteristics and better catalytic performance.
  • Electrocatalytic tests were performed on the nickel-cobalt oxide/carbide composite material and its precursor one-dimensional strip-shaped metal organic frame material prepared in Example 2.
  • the test instrument is the Princeton PMC 1000&500 electrochemical workstation.
  • the three electrodes are the Ag/AgCl electrode as the reference electrode, the graphite rod as the counter electrode, and the glassy carbon electrode with the catalyst sample (0.2mg/cm 2 ) as the working electrode.
  • the test is carried out in the system, and the test condition is 1M KOH aqueous solution.
  • Figure 4 shows that the one-dimensional metal oxide/carbide composite material—the nickel-cobalt oxide/carbide composite material has a higher ratio than its precursor (one-dimensional strip metal organic framework). Material) better catalytic performance.
  • An embodiment of the present invention provides a one-dimensional metal oxide/carbide composite material and a preparation method thereof.
  • the preparation method includes the following steps: calcining the one-dimensional metal organic framework material; wherein the calcining temperature is 200-600 °C; for the first time, the preparation method uses a one-dimensional metal-organic framework material as a precursor, and through one-step calcination and pyrolysis, a one-dimensional metal oxide/carbide composite material can be obtained; it still maintains a good one-dimensional morphology, and It has a large specific surface area, high dispersibility, more exposed active sites and good electrical conductivity; the preparation method is simple, low energy consumption, low raw material cost, and easy to scale up production.
  • the one-dimensional metal oxide/carbide composite material provided by the present invention has a large specific surface area, high dispersibility, more exposed active sites and good conductivity. It is used in electrocatalysis, batteries, capacitors, sensors, gas adsorption, etc. The field has very good application prospects.

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Abstract

Un mode de réalisation de la présente invention se rapporte au champ technique de la synthèse de nanomatériaux fonctionnels inorganiques, et se rapporte en particulier à un matériau composite oxyde/carbure de métal et à son procédé de préparation. L'étape du procédé de préparation consiste : à calciner un matériau d'armature organique de métal unidimensionnel, la température de calcination étant comprise entre 200 et 600 °C. Le matériau d'armature organique de métal est utilisé pour la première fois lors du procédé de préparation en tant que précurseur, et au moyen d'une pyrolyse de calcination en une étape, le matériau composite oxyde/carbure de métal peut être obtenu. Le matériau composite unidimensionnel oxyde/carbure de métal obtenu conserve une bonne morphologie unidimensionnelle, et a une large aire de surface spécifique, un haut degré de dispersion, plus de sites actifs exposés, et une bonne conductivité électrique. Le procédé de préparation est simple et pratique, consomme peu d'énergie et a de faibles coûts en matières premières, et est facile à passer à grande échelle pour la production. Le matériau composite unidimensionnel oxyde/carbure de métal selon la présente invention a une bonne morphologie unidimensionnelle, et a une large aire de surface spécifique, un haut degré de dispersion, plus de sites actifs exposés, et une bonne conductivité électrique.
PCT/CN2020/108936 2019-12-31 2020-08-13 Matériau composite unidimensionnel oxyde/carbure de métal et son procédé de préparation WO2021135252A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201911410023.9A CN111129468B (zh) 2019-12-31 2019-12-31 一种一维金属氧化物/碳化物复合材料及其制备方法
CN201911410023.9 2019-12-31
CN201911419839.8A CN111105935B (zh) 2019-12-31 2019-12-31 一种一维金属氧化物/碳化物复合材料及其制备方法
CN201911419839.8 2019-12-31

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CN114388753A (zh) * 2021-12-13 2022-04-22 安徽大学 边缘氮掺杂多孔空心碳纳米棒材料的制备方法、制得的材料及其应用
CN114988387A (zh) * 2022-04-29 2022-09-02 暨南大学 一种空心微米碳材料的制备方法及其应用
CN115058616A (zh) * 2022-06-16 2022-09-16 中国人民解放***箭军工程大学 一维微纳分级结构Co/C/CNTs复合吸波材料及其制备方法
CN116060067A (zh) * 2023-01-05 2023-05-05 中国医学科学院药用植物研究所 基于二维金属碳化物和过渡金属氧化物的复合材料及其在检测山奈酚中的应用
WO2023097744A1 (fr) * 2021-12-03 2023-06-08 苏州科技大学 Matériau à changement de phase photothermique à assemblage multidimensionnel, et son procédé de préparation
CN117353046A (zh) * 2023-12-05 2024-01-05 南昌大学 一种中空多层复合电磁吸波材料及其制备方法
CN117353046B (zh) * 2023-12-05 2024-06-04 南昌大学 一种中空多层复合电磁吸波材料及其制备方法

Citations (4)

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