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Composite coating-type tubular structural material, and preparation method and application thereof

A tubular structure and cladding technology, which is applied in the field of composite clad tubular structure materials and their preparation, can solve the problems that it is difficult to completely suppress direct nucleation and growth, and the research has not been carried out in depth.

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] So far, there has been no report on the composite materials composed of the same metal-organic framework materials and their oxides, and the research in this area has not been carried out in depth.
[0005] In addition, the synthesis of cladding structural materials faces two difficulties: (1) how to tightly combine the outer cladding material with the cladding material; (2) how to form a well-coated heterostructure material
Among them, the template method is considered to be an effective synthetic method. However, the commonly used template method often needs to modify the surface of the template with functional groups to modify its surface. Even so, it is difficult to completely inhibit the direct nucleation in the solution. and grow

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  • Composite coating-type tubular structural material, and preparation method and application thereof
  • Composite coating-type tubular structural material, and preparation method and application thereof

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preparation example Construction

[0022] The present invention also provides a preparation method of a composite coated tubular structure material, the method comprising the following steps: (1) dissolving the organic ligand in an organic solvent to form a mixed solution; (2) dissolving the cerium oxide nanotube in A hydrothermal reaction occurs in the mixed solution formed in step (1) to form a composite coated tubular structural material.

[0023] According to the present invention, the organic ligand can be an organic substance containing carboxyl or multidentate ligand, preferably terephthalic acid or trimesic acid; the organic solvent is dimethylformamide, ethanol and deionized water one or more.

[0024] According to the present invention, the cross section of the cerium oxide nanotubes is a regular hexagon, and the length of the cerium oxide nanotubes can be 3-5 microns, preferably 4-5 microns; the outer diameter is 1-2 microns, preferably 1-1.5 microns; the wall thickness is 100-300nm, preferably 120-...

Embodiment 1

[0040] Trimellitic acid (BTC) is dissolved in the deionized aqueous solution of DMF, and the volume ratio that makes described deionized water and described DMF is 1:0.2, and relative to the DMF of 20ml, the amount of trimesic acid The dosage is 0.438g (1mmol), stir with a magnetic stirrer at a temperature of 25°C until the trimesic acid is completely dissolved, and then pour the DMF mixed solution in which the trimesic acid has been dissolved into a 30ml stainless steel hydrothermal kettle;

[0041] The cerium oxide nanotubes were dissolved in the DMF mixed solution dissolved with trimesic acid, and then subjected to a constant temperature hydrothermal reaction at a temperature of 120°C for 40 hours to prepare a composite coated tubular structure material;

[0042] Wherein, the cross-section of the cerium oxide nanotubes is a regular hexagon, and the length of the cerium oxide nanotubes is 5 microns; the outer diameter of the cerium oxide nanotubes is 1 micron; the average of ...

Embodiment 2

[0047] The composite coated tubular structural material was prepared in the same manner as in Example 1, except that the amount of trimesic acid (BTC) was changed to 0.5 mmol.

[0048] Results The prepared composite coated tubular structural material contained cerium oxide nanotubes and cerium metal-organic framework materials coated on the cerium oxide nanotubes, and the average length of the composite coated tubular structural material was 4 microns ; the outer diameter is 1.5 microns; the thickness of the tube wall is 350nm; and the thickness of the cerium metal organic framework material coated on the cerium oxide nanotube is 150nm.

[0049] In addition, the composite coated tubular structure material can be used as a catalyst in gas adsorption and separation.

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Abstract

The invention discloses a composite coating-type tubular structural material, and a preparation method and application thereof. The tubular structural material contains a cerium oxide nanotube a cerium metal organic skeletal material covering the cerium oxide nanotube. A template autocatalytic synthesis method is employed, concretely, a template self is utilized to dissolve and release a growth unit as a reaction precursor, and forms an active site on the surface, a layer of a metal organic skeleton structure is synthesized on the template surface, and cooperates with cerium oxide to form a well-combined coating type tubular structural material. Synthesis is simple and controllable, and the prepared tubular structural material gives play to relatively good catalytic effect on N2, CO2, CH4 and other gases and relatively good gas sensing performance, and is widely applicable to automobile tail gas purification and other catalytic fields.

Description

technical field [0001] The invention relates to a composite coating tubular structural material and a preparation method thereof, and also relates to the application of the composite coating tubular structural material as a gas selective adsorbent or catalyst. Background technique [0002] Metal-organic frameworks (Metal-Organic Frameworks, MOFs) are a kind of porous and high specific surface area, usually composed of multidentate organic ligands containing oxygen, nitrogen, etc. (mostly aromatic polyacids and polybases) and transition metal ions. Assembled coordination polymers. Such materials usually have large specific surface area, special topological structure, tunable channels and special internal arrangement rules. These excellent properties make them have good application prospects in catalysis, hydrogen storage, separation and molecular recognition. . [0003] Compared with pure MOFs, heterostructures combining MOFs and other functional materials have shown greate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/02B01D53/94B01J31/26B01J35/02B01J35/00
Inventor 冯英杰张明森姜健准
Owner CHINA PETROLEUM & CHEM CORP