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