Bipolar membrane with copper-metal organic framework material as intermediate interface layer and preparation method of bipolar membrane
A metal-organic framework and interface layer technology, applied in organic diaphragms, electrodes, cells, etc., can solve the problems of low nitrogen reduction efficiency, low water dissociation efficiency, and high water dissociation voltage, so as to improve the photoelectric conversion efficiency and reduce the activation energy. , to promote the effect of water dissociation reaction
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Embodiment 1
[0028] Preparation of Copper-MOF:
[0029] Dissolve 0.256g of copper nitrate and 0.86g of trimesic acid in 50 mL of N,N-dimethylformamide, then add the ionic liquid of 1-butyl-3-methylimidazolium chloride salt, stir until completely dissolved As an electrolyte; using copper as the anode and titanium as the cathode, the current density is 0.025A cm -2 After 2.5 h of reaction, blue flocs were formed in the solution, and the precipitate was filtered, washed three times with N,N-dimethylformamide and chloroform, and then dried and stored. The morphology and structure are shown in the appendix figure 1 shown.
[0030] Preparation of bipolar membrane:
[0031] The preparation mass fraction is 2.5% carboxymethyl cellulose aqueous solution, and the polyvinyl alcohol aqueous solution of 2.5%, after mixing and constantly stirring to form a jelly, make the cation exchange membrane liquid after standing defoaming 90 minutes, the cation exchange The membrane solution was cast on a clean...
Embodiment 2
[0036] Synthesis of Cu-MOFs:
[0037] Dissolve 0.3g of copper nitrate and 0.9g of trimesic acid in 50 mL of N,N-dimethylformamide, then add the ionic liquid of 1-butyl-3-methylimidazolium bromide, and stir until completely dissolved As an electrolyte; using copper as the anode and titanium as the cathode, the current density is 0.035A cm -2 After 1.5 h of reaction, a blue floc was formed in the solution, and the precipitate was filtered, washed three times with N,N-dimethylformamide and chloroform, and then dried and stored.
[0038] Preparation of bipolar membrane:
[0039] Preparation mass fraction is 1.5% cellulose acetate aqueous solution, and 1.5% polyvinylpyrrolidone aqueous solution, mixes and constantly stirs to form jelly, makes cation-exchange membrane liquid after standing defoaming for 60 minutes, and cation-exchange membrane liquid Cast on a clean glass plate with a frame, and air-dry at room temperature to obtain a cation exchange membrane with a thickness of 3...
Embodiment 3
[0044] Synthesis of Cu-MOFs:
[0045] Dissolve 0.26g of copper nitrate and 0.56g of trimesic acid in 50 mL of N,N-dimethylformamide, then add the ionic liquid of 1-butyl-3-methylimidazolium bromide, and stir until completely dissolved As the electrolyte; using copper as the anode, titanium as the cathode, at a current density of 0.015A cm -2 After 3.5 h of reaction, blue flocs were formed in the solution, and the precipitate was filtered, washed three times with N,N-dimethylformamide and chloroform, and then dried and stored.
[0046] Preparation of bipolar membrane:
[0047] Preparation mass fraction is the cellulose acetate aqueous solution of 3.5%, and the polyvinyl alcohol aqueous solution of 3.5%, after mixing and constantly stirring to form jelly, after leaving standstill defoaming 80 minutes, make cation-exchange membrane liquid, the cation-exchange membrane liquid Cast on a clean glass plate with a frame, and air-dry at room temperature to obtain a cation exchange me...
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