Preparation method of inorganic mesoporous membrane

A kind of mesoporous membrane, inorganic technology, applied in the field of preparation of inorganic mesoporous membrane, can solve the problems of inorganic film cracks, easily damaged inorganic film, etc., achieve the effect of reducing the difficulty and cost of preparation, and enriching the three-dimensional interconnected pore structure

Inactive Publication Date: 2011-12-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the organic filling layer must be removed through the sintering process, which is easy to damage the inorganic film and cause defects such as cracks in the inorganic film.

Method used

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  • Preparation method of inorganic mesoporous membrane
  • Preparation method of inorganic mesoporous membrane
  • Preparation method of inorganic mesoporous membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the inorganic mesoporous membrane of the present embodiment comprises the following steps:

[0029] Step 1: At room temperature, fully mix ethyl orthosilicate with deionized water and hydrochloric acid, and stir for 20 minutes to obtain a sol mixed solution; (hydrochloric acid acts as a catalyst and a pore-forming agent at the same time)

[0030] Step 2: Pour the obtained sol mixture into a petri dish, and transform it into a gel at room temperature to obtain a metal oxide gel;

[0031] Step 3: Repeatedly soak the gel with deionized water until the soaking solution is close to neutral, and then wash away the pore-forming agent in the metal oxide gel;

[0032] Step 4: drying the washed metal oxide gel to obtain an inorganic mesoporous membrane based on metal oxide.

[0033]

[0034] Implementation effect: The chemical composition of the inorganic mesoporous membrane prepared in this example is mainly SiO 2 ; The average pore diameter measur...

Embodiment 2

[0036] The preparation method of the inorganic mesoporous membrane of the present embodiment comprises the following steps:

[0037] Step 1: At room temperature, fully mix the metal oxide precursor with water and catalyst, and stir for 20 minutes to obtain a sol mixed solution; then slowly add the pore-forming agent to the mixed solution, and stir for 5 minutes;

[0038] Step 2: Pour the obtained sol mixture into a petri dish, and transform it into a gel at room temperature to obtain a metal oxide gel;

[0039] Step 3: Soak the gel repeatedly with a solvent until the soaking solution is close to neutral, and then wash away the pore-forming agent in the metal oxide gel;

[0040] Step 4: drying the washed metal oxide gel to obtain an inorganic mesoporous membrane based on metal oxide.

[0041]

[0042] Implementation effect: the chemical composition of the inorganic mesoporous membrane prepared in Example 2 is mainly SiO 2 ; The average pore diameter measured by nitrogen ad...

Embodiment 4～23

[0044]The preparation method of the inorganic mesoporous membrane in Examples 4-23 comprises the following steps:

[0045] Step 1: At room temperature, fully mix the metal oxide precursor with water, catalyst, and pore-forming agent, and stir for 20 minutes to obtain a sol mixed solution;

[0046] The second step: Pour the obtained sol mixture into a petri dish, and transform it into a gel at room temperature to obtain a metal oxide gel; After heat preservation at 120°C for 24 hours, cool to room temperature; (the mechanical strength of the inorganic mesoporous membrane obtained after heat treatment is better than that obtained without heat treatment)

[0047] Step 3: Soak the gel repeatedly with a solvent until the soaking solution is close to neutral, and then wash away the pore-forming agent in the metal oxide gel;

[0048] Step 4: drying the washed metal oxide gel to obtain an inorganic mesoporous membrane based on metal oxide.

[0049] The specific material used in each...

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Abstract

The invention relates to a preparation method of an inorganic mesoporous membrane, which comprises the following steps: fully mixing metallic oxide presoma, water, a catalyzer and a pore-forming agent to obtain mixed sol solution; pouring the mixed sol solution, curing and forming to prepare a metallic oxide gel; washing the pore-forming agent in the metallic oxide gel; and drying the washed metallic oxide gel to obtain the inorganic mesoporous membrane based a metallic oxide. In the invention, acid is used as the pore-forming agent, the accurate control to the aperture of the inorganic mesoporous membrane is realized by changing the content of the pore-forming agent, and the prepared metallic oxide mesoporous membrane has a high-through three-dimensional connected through hole structure.The preparation method disclosed by the invention is economic, simple and effective, and can remarkably reduce the preparation difficulty and cost of the inorganic mesoporous membrane, and greatly promotes the wide application of a inorganic mesoporous material in filter, catalyzing, sensors and other fields.

Description

technical field [0001] The invention relates to a preparation method of an inorganic mesoporous membrane, in particular to a preparation method of an inorganic mesoporous membrane based on a metal oxide. Background technique [0002] Compared with organic membranes, inorganic membranes have the advantages of high thermal stability, good chemical stability, and strong solvent tolerance, and can be widely used in pharmaceutical, chemical, water purification, food processing and other industries. [0003] Currently reported inorganic mesoporous membrane materials mainly include γ-alumina, titania, zirconia and silica. However, mesoporous materials such as γ-alumina, titania, and zirconia usually have a relatively wide pore size distribution, which cannot meet the requirements of ultrafiltration or nanofiltration membranes. The mesoporous silica material with three-dimensional interconnected pore structure prepared by adding surfactant template and self-assembly process is a ki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00
Inventor 蒋峰景李海滨
Owner SHANGHAI JIAO TONG UNIV
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