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Preparation method for zeolite-like imidazate framework (ZIFs) coated inorganic oxide core-shell material

An inorganic oxide and encapsulation technology, applied in the field of materials, can solve the problems of complex preparation equipment, difficult product separation, harsh preparation conditions, etc., and achieve the effect of simple operation, mild conditions and good universality

Inactive Publication Date: 2018-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the preparation conditions are harsh, the preparation equipment is complicated, and the product separation is difficult, etc.

Method used

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  • Preparation method for zeolite-like imidazate framework (ZIFs) coated inorganic oxide core-shell material
  • Preparation method for zeolite-like imidazate framework (ZIFs) coated inorganic oxide core-shell material
  • Preparation method for zeolite-like imidazate framework (ZIFs) coated inorganic oxide core-shell material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: 0.065 gram of layered spherical hollow cuprous oxide, 30 milliliters of methyl alcohol, join in the there-necked flask of 100 milliliters, 2-methylimidazole (0.17~0.22 gram) methanol solution and cobalt nitrate (0.08~ 0.11 g) of methanol solution was slowly added to the flask while stirring, and the stirring was maintained at room temperature and pressure for 1-8h. Stirring was then stopped, and the entire reaction mixture was transferred to a centrifuge tube. Centrifuge at 4500rpm, wash the solid product several times with methanol, dry the product in an oven at 80°C for 12 hours, and collect the solid product. Then sampling infrared analysis (FT-IR, figure 1 ), and observe the position of the absorption peak. Observation of sample morphology and size by TEM and SEM (SEM and TEM, figure 2 ). The results showed that the product was Cu 2 O(hollow)@ZIFs core-shell structure.

Embodiment 2

[0031] Embodiment 2: 0.065 gram of solid spherical cuprous oxide, 30 milliliters of methyl alcohol, join in the there-necked flask of 100 milliliters, 2-methylimidazole (0.17~0.22 gram) methanol solution and cobalt nitrate (0.08~0.11 gram ) methanol solution was slowly added to the flask while stirring, and the stirring was maintained at room temperature and pressure for 1-8h. Stirring was then stopped, and the entire reaction mixture was transferred to a centrifuge tube. Centrifuge at 4500rpm, wash the solid product several times with methanol, dry the product in an oven at 80°C for 12 hours, and collect the solid product. Then sampling infrared analysis (FT-IR, image 3 ), and observe the position of the absorption peak. by TEM Figure 4 The shape and size of the samples were observed. It was confirmed that the obtained product was a core-shell structure material. The results showed that the product was Cu 2 O (solid) @ZIFs core-shell structure.

Embodiment 3

[0032] Embodiment 3: 0.065 gram of hollow lamellar spherical cuprous oxide, 30 milliliters of methyl alcohol, join in the there-necked flask of 100 milliliters, 2-methylimidazole (0.17~0.22 gram) methanol solution and cobalt nitrate (0.08~ 0.11 g) of methanol solution was quickly added to the flask while stirring, and the stirring was maintained at room temperature and pressure for 1-8h. Stirring was then stopped, and the entire reaction mixture was transferred to a centrifuge tube. After centrifugation at 4500 rpm, the solid product was washed several times with methanol, and the product was dried in an oven at 80° C. for 12 hours. The ZIFs core-shell structure was not obtained when the product was collected. The product was observed by TEM (TEM, Figure 5 ) and infrared analysis of the product did not form a core-shell structure (FT-IR, Figure 6 ).

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Abstract

The invention provides a preparation method for a zeolite-like imidazate framework (ZIFs) coated inorganic oxide core-shell material. The method comprises the following steps: with cuprous oxide or silicon dioxide as a core material, allowing an imidazole organic ligand and metal salt to generate coordination polymerization on the surface of the core material so as to form a continuous ZIFs shelland obtain a ZIFs shell coated material with a core-shell structure. The method provided by the invention has the advantages of simplicity, mild conditions, strong general applicability and importantapplication values.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for preparing a ZIFs-wrapped inorganic oxide core-shell structure material. Background technique [0002] ZIF materials are metal-organic coordination polymers with different topological structures formed by the complexation of metal ions and imidazole organic ligands. ZIFs are porous, structurally tunable, functionally diverse, and have good thermal and chemical stability, so they have potential applications in many fields, such as catalysis, gas adsorption and separation, photoelectrochemistry, drug conduction, and microreactors. , Sewage treatment, etc. [0003] In order to further improve the application of ZIFs materials in many fields, the morphology of the materials can be adjusted, and the preparation of materials with different dimensions can be realized. Fabricating materials into core-shell structures is an effective way to effectively utilize morphology features to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J35/02B01J20/22B01J20/28B01J20/30
CPCB01J20/226B01J20/28019B01J20/28021B01J31/28B01J2531/26B01J2531/845B01J35/39B01J35/00B01J35/30
Inventor 徐杰王天龙马红高进孙志强苗虹聂鑫
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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