Constant current synthesis method for phosphorus aluminum molecular sieve membrane
A kind of technology of phosphorus aluminum molecular sieve and synthesis method, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of narrow, limited and difficult electrochemical window of solvent water
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Embodiment 1
[0024] The preparation of embodiment 1 phosphorus aluminum molecular sieve membrane
[0025] 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.
[0026] 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.
[0027] 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. It is 10nA, and the synthesis time is 4h. The synthesized aluminum flakes were washed with deionized water, dried with high-pressure air, and then oven-dried at 60°C overnight. The XRD of the molecular sieve grown on the Al sheet of the working electrode confirmed the AEL structure, and the scan...
Embodiment 2
[0028] The preparation of embodiment 2 phosphorus aluminum molecular sieve membrane
[0029] By the same operation as in Example 1, just change the test value of the constant current: 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.
[0030] 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.
[0031] 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. It is 100nA, and the synthesis time is 4h. The XRD of the molecular sieve grown on the Al sheet of the working electrode confirmed that it has an AEL structure. The scanning electron micrographs showed tha...
Embodiment 3
[0032] Embodiment 3 anticorrosion performance test
[0033] The etching solution is 0.1M NaCl aqueous solution. Pour the corrosion solution into the corrosion pool, the working electrode is a bare aluminum sheet or the molecular sieve membrane prepared in Example 2, the counter electrode is a Pt sheet, and the reference electrode is (Ag.AgCl) / KCl (3.5M). Before the corrosion test, the molecular sieve was stabilized in the corrosion solution for 30 minutes, and then the DC polarization curve was scanned, the scanning range was -0.5V to 0.5V, and the scanning speed was 10mV / min. The result is as figure 2 shown. It is shown that the dense, highly in-plane and in-plane oriented molecular sieve membranes synthesized by electrochemical methods have excellent anti-corrosion properties.
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