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Method for preparing porous material by physicochemical treatment

A porous material, physical and chemical technology, applied in the field of composite porous material preparation, can solve the problems of solvent molecule residue, porous material channel collapse, etc., to achieve the effect of improving compactness, refining grains, and avoiding residue

Active Publication Date: 2013-09-25
王朝晖
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional preparation methods of porous materials include hydrothermal method, precipitation method, sol-gel method and other methods. These methods are all liquid methods, and their main disadvantage is that solvent molecules will remain in the pores of the material.
Due to this templating effect, as the solvent molecules are removed, the pores of porous materials may collapse, which requires post-processing, which is a major problem in the preparation of porous materials by liquid methods.

Method used

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  • Method for preparing porous material by physicochemical treatment
  • Method for preparing porous material by physicochemical treatment
  • Method for preparing porous material by physicochemical treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This embodiment provides a method for preparing a porous material by microwave treatment, which includes the following steps:

[0040] Mix 350g of zinc nitrate, 350g of activated carbon and 350g of solid citric acid at 100°C to obtain a mixture, then add 200mL of ethanol to make the mixture more uniform;

[0041] Adopt 800W microwave to irradiate the mixture for 15min;

[0042] The reaction product was washed 2-3 times with 5L of distilled water, and then centrifuged (at a speed of 3000 rpm for 5 minutes) to obtain a solid product;

[0043] Dry the solid product at 120°C for 4 hours to obtain a specific surface area of ​​1000m 2 / g of zinc-based composite porous materials.

[0044] The infrared spectrum, thermogravimetric TGA analysis results and diffraction patterns of the above-mentioned zinc-based composite porous materials are as follows: Figure 1-3 shown.

[0045] figure 1 It is the infrared spectrum of the zinc-based composite porous material prepared three ...

Embodiment 2

[0049] This embodiment provides a method for preparing a porous material by ball milling, which includes the following steps:

[0050] 350g of copper nitrate, 350g of iron nitrate solid and 500g of tartaric acid are placed in a ball mill to obtain a mixture without adding solvent;

[0051] The mixture was ball milled for 40 minutes, scraped off the solids adhering to the wall of the mixer, and ball milled for 40 minutes to make it evenly mixed;

[0052] Wash the solid product obtained by ball milling with 5 L of water for 2-3 times, and then perform centrifugation (3500 rpm for 5 minutes) to obtain a solid product;

[0053] Dry the solid product at 120°C for 8 hours, then put it into a muffle furnace and bake it at 550°C for 10 hours to obtain a specific surface area of ​​411m 2 / g copper-iron composite porous material.

[0054] Figure 4 The powder XRD diffraction and fitting theoretical diffraction patterns of the above-mentioned copper-iron composite porous material, it ...

Embodiment 3

[0057] This embodiment provides a method for preparing a porous material by stirring treatment, which includes the following steps:

[0058] Put 300g of zinc acetate, 500g of aluminum acetate solid, 200g of NaY molecular sieve (activated at 500°C) and 200g of imidazole in a blender, add 300ml of ethanol with a concentration of 95wt%, and mix to obtain a mixture;

[0059] Run the mixer and stir the mixture for 1 hour to fully mix and react the materials;

[0060] The reaction product was washed 3-5 times with 5L of distilled water, and then centrifuged (3000rpm for 5 minutes) to obtain a solid product;

[0061] Dry the solid product at 120°C for 10 hours to obtain a specific surface area of ​​680m 2 / g calcium-magnesium composite porous material.

[0062] Figure 6 The powder XRD diffraction pattern and the fitted theoretical diffraction pattern of the calcium-magnesium composite porous material prepared for Example 3, it can be seen that the actual diffraction pattern basic...

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Abstract

The invention relates to a method for preparing a porous material by physicochemical treatment. The method comprises the following steps of: mixing a base subjected to high-temperature activation and metal solid salt to obtain a mixture; carrying out the physicochemical treatment on the mixture; and then, washing, dehydrating, drying and / or baking a product to obtain the porous material, wherein the base is zeolite, a molecular sieve, active aluminum oxide, active carbon or a metal compound porous material containing organic functional groups; the metal solid salt is nitrate, acetate or chloride containing metal cations; the physicochemical treatment comprises the step of carrying out microwave heating treatment or mechanical mixing treatment on the mixture. The porous material prepared by the preparation method disclosed by the invention has good application prospects in the fields of separation, purification, storage and the like of gas.

Description

technical field [0001] The invention relates to a method for preparing porous materials by physical and chemical treatment, and belongs to the technical field of composite porous materials preparation. Background technique [0002] Porous materials refer to nanomaterials with a large number of pore structures of a certain size and a high specific surface area. It is an important branch of material science and has great significance for scientific research and industrial production. In recent years, the research work on porous materials has been very active. No matter in the innovation and improvement of preparation methods, or in the research and utilization of physical properties, great progress has been made, especially in traditional porous materials such as zeolite and activated carbon, as well as new metal-organic frameworks in recent years. Materials design and synthesis have become a major fundamental issue in the field of ultra-high specific surface area materials su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/18B01J20/22B01J20/08B01J20/30
Inventor 王朝晖
Owner 王朝晖
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