Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of hierarchical porous zeolite imidazolate framework material and preparation method thereof

A zeolite imidazolate, framework material technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc. Long and other problems, to achieve the effect of mild conditions, good catalytic activity, and short time consumption

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in the current method, such as long reaction time, use of special additives (triethylamine or ammonium hydroxide), etc.
In addition, the high cost and backbone instability of long ligands is almost unavoidable, since their mesopores are extremely prone to collapse upon guest removal.
Moreover, the use of organic solvents in large quantities is not economical and environmentally friendly

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of hierarchical porous zeolite imidazolate framework material and preparation method thereof
  • A kind of hierarchical porous zeolite imidazolate framework material and preparation method thereof
  • A kind of hierarchical porous zeolite imidazolate framework material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of a hierarchical porous zeolite imidazolate framework material, comprising the following steps:

[0034] (1) Add 0.44g Zn(NO 3 ) 2 ·6H 2 O and 0.13g Sodium Dodecyl Sulfate (SDS), stirred at 60°C until the solid was dissolved to obtain a clear and transparent homogeneous solution;

[0035] (2) Add 0.49g of 2-methylimidazole (2-Mim) to the homogeneous solution, and stir at 60°C for 30min to obtain a suspension;

[0036] (3) Centrifuge the suspension, wash with 50% ethanol aqueous solution and absolute ethanol, and dry at 110° C. for 12 hours to obtain the zeolite imidazolate framework material (ZIF8). Table 1 shows the structural characterization test data of the zeolite-like imidazolate framework material prepared in this example.

[0037] The X-ray diffraction pattern of the hierarchically porous zeolite imidazolate framework material (ZIF-8) prepared in Example 1 is as follows figure 1 As shown, the scanning electron microscope image is shown...

Embodiment 2

[0039] A preparation method of a hierarchical porous zeolite imidazolate framework material, comprising the following steps:

[0040] (1) With 4.75g deep eutectic solvent (ChCl / urea-DES, the molar ratio of choline chloride and urea is 1:2) and 0.25g deionized water, stir and mix evenly, obtain mixed solvent;

[0041] (2) Add 0.44g Zn(NO 3 ) 2 ·6H 2 O and 0.13g Sodium Dodecyl Sulfate (SDS), stirred at 60°C until the solid was dissolved to obtain a clear and transparent homogeneous solution;

[0042] (3) Add 0.49g of 2-methylimidazole (2-Mim) to the homogeneous solution and stir at 60°C for 30min to obtain a suspension;

[0043] (4) Centrifuge the suspension, wash with 50% ethanol aqueous solution and absolute ethanol, and dry at 110° C. for 12 hours to obtain the zeolite imidazolate framework material. Table 1 shows the structural characterization test data of the zeolite-like imidazolate framework material prepared in this example.

[0044] The X-ray diffraction pattern o...

Embodiment 3

[0046] A preparation method of a hierarchical porous zeolite imidazolate framework material, comprising the following steps:

[0047] (1) With 4.25g deep eutectic solvent (ChCl / urea-DES, the molar ratio of choline chloride and urea is 1:2) and 0.75g deionized water, stir and mix evenly, obtain mixed solvent;

[0048] (2) Add 0.44g Zn(NO 3 ) 2 ·6H 2 O and 0.13g Sodium Dodecyl Sulfate (SDS), stirred at 60°C until the solid was dissolved to obtain a clear and transparent homogeneous solution;

[0049] (3) Add 0.49g of 2-methylimidazole (2-Mim) to the homogeneous solution and stir at 60°C for 30min to obtain a suspension;

[0050](4) Centrifuge the suspension, wash with 50% ethanol aqueous solution and absolute ethanol, and dry at 110° C. for 12 hours to obtain the zeolite imidazolate framework material. Table 1 shows the structural characterization test data of the zeolite-like imidazolate framework material prepared in this example.

[0051] The X-ray diffraction pattern of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of metal-organic framework materials and discloses a hierarchical porous zeolite imidazolate framework material and a preparation method thereof. Method: 1) Mix a deep eutectic solvent and water to obtain a mixed solvent; 2) Dissolve a metal salt and a surfactant in the mixed solvent to obtain a homogeneous solution; the metal salt is at least one of zinc salt or cobalt salt; 3) Add imidazole derivatives to the homogeneous solution, heat and stir to obtain a suspension; 4) Centrifuge the suspension, wash and dry to obtain a zeolite-like imidazolate framework material. The method of the invention is simple, has mild conditions, is fast, and has no environmental pollution. The prepared material has high specific surface area and porosity, and has a hierarchical pore structure; the material obtained by the present invention reacts in CO 2 It has good catalytic activity in cycloaddition reactions with epoxides.

Description

technical field [0001] The invention belongs to the technical field of metal organic framework materials, and relates to a hierarchical porous zeolite imidazolate framework material and a preparation method thereof. Background technique [0002] Metal-organic frameworks (MOFs) are a class of inorganic-organic hybrid porous materials with regular pore structures constructed by interconnecting metal centers and organic ligands through covalent bonds or ionic covalent bonds. With the research and development of MOFs materials, a kind of zeolitic imidazolate frameworks (ZIFs) has been synthesized. ZIFs is a kind of MOFs materials with zeolite framework structure, which is composed of transition metal ions Zn or Co and imidazole organic compounds. It has the advantages of both zeolite and MOFs: large specific surface area, high crystallinity, high thermal and chemical stability. ZIFs also have the characteristics of tunable pore size and structure. Therefore, ZIFs are often use...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00B01J31/06B01J35/10C07D317/36
CPCC08G83/008B01J31/063C07D317/36B01J35/618B01J35/617B01J35/638B01J35/635B01J35/633B01J35/651B01J35/647
Inventor 陈砺胡丽华严宗诚磨晓虹
Owner SOUTH CHINA UNIV OF TECH