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A kind of preparation method of oxide porous material

A technology for porous materials and oxides, which is applied in the field of preparation of oxide porous materials, can solve the problem that the pore size, porosity and wall thickness of the target material are not easy to control in a large range, the colloidal crystal template process is complicated, and it is difficult to mass-produce and other problems, so as to avoid the instability of the overall structure, improve the stability and functionality, and achieve the effect of suitable operation.

Active Publication Date: 2017-09-29
WUHAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the colloidal crystal template method is used, it is usually necessary to prepare the colloidal crystal template in advance, and the process of preparing the colloidal crystal template is relatively complicated, and it is difficult to produce on a large scale. Properties such as porosity and wall thickness are not easy to control in a large range

Method used

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  • A kind of preparation method of oxide porous material
  • A kind of preparation method of oxide porous material
  • A kind of preparation method of oxide porous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for preparing a manganese dioxide porous material. Described preparation method is:

[0027] 1) According to the concentration of 5~6.5mol / L, dissolve manganese nitrate tetrahydrate in tert-butanol and stir for 3~5 hours to obtain solution Ⅰ.

[0028] 2) According to the mass ratio of manganese nitrate tetrahydrate and ethyl cellulose is 1: (0.01~0.04), add ethyl cellulose to solution I and stir for 1~2 hours to obtain solution II.

[0029] 3) According to the mass ratio of manganese nitrate tetrahydrate to silicon dioxide is 1: (0.25~0.35), silicon dioxide is added to solution II, and stirred for 3~5 hours to obtain solution III.

[0030] 4) The solution III is then subjected to liquid nitrogen freezing treatment, and then dried in a vacuum freeze dryer for 48-72 hours to obtain a dried product.

[0031] 5) Put the dried product in a tube furnace, heat up to 300-500°C at a rate of 4-5°C / min in an argon atmosphere or an air atmosphere, keep it for 4-7 hours, ...

Embodiment 2

[0034] A method for preparing a titanium dioxide porous material. Described preparation method is:

[0035] 1) According to the concentration of 6.5~8.0mol / L, dissolve titanium sulfate in tert-butanol and stir for 3~5 hours to obtain solution I.

[0036] 2) According to the mass ratio of titanium sulfate and polyvinylpyrrolidone is 1: (0.04~0.07), add polyvinylpyrrolidone into solution I, and stir for 1~2 hours to obtain solution II.

[0037] 3) According to the mass ratio of titanium sulfate to polymethyl methacrylate is 1: (0.15~0.25), add polymethyl methacrylate into solution II, stir for 3~5 hours to obtain solution III.

[0038] 4) The solution III is then subjected to liquid nitrogen freezing treatment, and then dried in a vacuum freeze dryer for 48-72 hours to obtain the dried product;

[0039] 5) Place the dried product in a tube furnace, heat up to 500-700°C at a rate of 4-5°C / min in an argon atmosphere or an air atmosphere, keep it warm for 7-10 hours, and cool nat...

Embodiment 3

[0042] A method for preparing a lithium titanate porous material. Described preparation method is:

[0043] 1) According to the concentration of each substance at 8.0~10.0mol / L, dissolve tetrabutyl titanate and lithium acetate dihydrate in organic solvent successively, and stir for 3~5 hours to obtain solution I.

[0044] The organic solvent is a mixed solvent of ethanol and glacial acetic acid, and the volume ratio of ethanol and glacial acetic acid in the mixed solvent is 1:1.

[0045] 2) According to the mass ratio of the mixed salt of tetrabutyl titanate and lithium acetate dihydrate to ethyl cellulose is 1: (0.07~0.10), add ethyl cellulose to solution I and stir for 1~2 hours to obtain Solution II.

[0046] 3) According to the mass ratio of the mixed salt of tetrabutyl titanate and lithium acetate dihydrate to polystyrene is 1: (0.10~0.15), add polystyrene into solution II, stir for 3~5 hours to obtain solution III .

[0047] 4) The solution III is then subjected to l...

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Abstract

The invention relates to a preparation method of an oxide porous material. According to the technical scheme, the method comprises the steps that an oxide precursor salt is dissolved in organic solvent according to the concentration ranging from 5 mol / L to 10 mol / L, stirring is conducted, and a solution I is obtained; a binder is added into the solution I according to the mass ratio of the oxide precursor salt to the binder of 1 to 0.01-0.1, stirring is conducted, and a solution II is obtained; a template agent is added into the solution II according to the mass ratio of the oxide precursor salt to the template agent of 1 to 0.1-0.35, stirring is conducted, and a solution III is obtained; liquid nitrogen freezing treatment is conducted on the solution III, drying is conducted in a vacuum freezing dryer, and a dried product is obtained; the product is put in a tube furnace, the temperature rapidly rises to 300-800 DEG C at the speed of 4-5 DEG C / min in an argon atmosphere or air atmosphere, heat preservation is conducted for 4-12 h, natural cooling is conducted along with the furnace, the template agent is removed, and the oxide porous material is obtained. The preparation method of the oxide porous material is convenient to operate and suitable for industrial production, and the hole size, the porosity and the wall thickness of the product can be regulated in a larger range.

Description

technical field [0001] The invention belongs to the technical field of porous material preparation. In particular, it relates to a preparation method of an oxide porous material. Background technique [0002] Porous materials have the characteristics of high specific surface area, low relative density, good permeability, light weight, unique pore structure and excellent adsorption performance. be widely used. Therefore, developing a simple and effective preparation method to control the pore structure of porous materials is the key to realize their application in these fields. [0003] At present, porous materials are mainly prepared by colloidal crystal template method, including hard template method and soft template method. When the colloidal crystal template method is used, it is usually necessary to prepare the colloidal crystal template in advance, and the process of preparing the colloidal crystal template is relatively complicated, and it is difficult to produce o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B13/14C01G45/02C01G23/08C01G23/00
CPCC01B13/14C01G23/005C01G23/08C01G45/02C01P2002/72C01P2004/03C01P2006/12C01P2006/16
Inventor 周盈科田小慧胡敏涂晓峰都国栋
Owner WUHAN UNIV OF SCI & TECH
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