Phosphorus aluminum molecular sieve membrane potentiostatic synthesis method
A phospho-aluminum molecular sieve and a synthesis method are applied in the field of synthesis of molecular sieve membranes, and can solve the problems of narrow, difficult, and limited electrochemical window of solvent water.
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Embodiment 1
[0032] Example 1 Preparation of Aluminum Phosphorus Molecular Sieve Membrane
[0033] The synthesis solution for synthesizing molecular sieve membranes is prepared as follows:
[0034] Add 1.7 g of phosphoric acid and 0.2 g of HF into 32 g of 1-ethyl-3-methyl-imidazolium bromide ionic liquid, and heat and stir at 60° C. for 1 hour.
[0035] The substrate used in the synthesis of molecular sieve membranes is pure aluminum sheet with a purity of 99.99%, a length of 37mm, and a width of 18mm. Substrates were cleaned ultrasonically in acetone before use, and then dried with high-pressure air for later use.
[0036] Place two pure aluminum sheets vertically in an open reaction bottle as the working electrode and counter electrode respectively, and the reference electrode is Pt. Pour the synthesis solution into the reaction bottle, heat the system to 190°C, and use the constant potential method to set the voltage The temperature is -0.2V (vs. reference electrode), and the synthesi...
Embodiment 2
[0037] Example 2 Preparation of Aluminum Phosphorus Molecular Sieve Membrane
[0038] According to the same operation as in Example 1, just change the electrochemical synthesis time: the substrate used for synthesizing the molecular sieve membrane is a pure aluminum sheet with a purity of 99.99%, a length of 37 mm, and a width of 18 mm. Substrates were cleaned ultrasonically in acetone before use, and then dried with high-pressure air for later use.
[0039] Add 1.7 g of phosphoric acid and 0.2 g of HF into 32 g of 1-ethyl-3-methyl-imidazolium bromide ionic liquid, and heat and stir at 60° C. for 1 hour.
[0040] Place two pure aluminum sheets vertically in an open reaction bottle as the working electrode and counter electrode respectively, and the reference electrode is Pt. Pour the synthesis solution into the reaction bottle, heat the system to 190°C, and use the constant potential method to set the voltage It is -0.2V (vs. reference electrode), and the synthesis time is 6h...
Embodiment 3
[0041] Example 3 Preparation of Aluminum Phosphorus Molecular Sieve Membrane
[0042] According to the same operation as in Example 1, just change the composition of the synthetic liquid: the substrate used for the synthetic molecular sieve membrane is a pure aluminum sheet with a purity of 99.99%, a length of 37 mm, and a width of 18 mm. Substrates were cleaned ultrasonically in acetone before use, and then dried with high-pressure air for later use.
[0043] Add 0.51 g of phosphoric acid and 0.06 g of HF into 32 g of 1-ethyl-3-methyl-imidazolium bromide ionic liquid, and heat and stir at 60° C. for 1 hour.
[0044] Place two pure aluminum sheets vertically in an open reaction bottle as the working electrode and counter electrode respectively, and the reference electrode is Pt. Pour the synthesis solution into the reaction bottle, heat the system to 190°C, and use the constant potential method to set the voltage It is -0.2V (vs. reference electrode), and the synthesis time i...
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