Visible light catalyzed hollow fiber ultrafiltration membrane based on doped nano Cu2O and preparation method thereof
An ultrafiltration membrane and visible light technology, applied in chemical instruments and methods, ultrafiltration, membranes, etc., can solve the problems of slow degradation rate, complex preparation method, inability to prepare separation membrane, etc., achieve catalytic degradation, and simple membrane preparation process. , anti-pollution and visible light catalytic activity improvement effect
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[0027] Example 1:
[0028] Mix 62.0% (w / w) dimethylacetamide, 15.0% (w / w) polyethylene glycol 400, 1.0% (w / w) Tween-80 and 3.0% (w / w) Nitrogen doped nano Cu 2 O was added to the dissolving tank in a certain order and stirred uniformly; then 19.0% (w / w) polysulfone was added, and the mixture was stirred and dissolved at 85°C for 8 hours until it was completely dissolved; then, the obtained casting liquid Stir and stand for 24 hours at the temperature of dissolution to remove the bubbles remaining in the casting solution.
[0029] Control the flow rate of the casting solution to 10.0mL / min, the temperature of the casting solution to 35°C, the temperature of the coagulation bath to 23°C, the height of the air space to 5cm, the coagulation time of the hollow fiber ultrafiltration membrane to be 1.0 minutes, using traditional dry-wet spinning The silk process prepares the visible light catalytic hollow fiber ultrafiltration membrane. The prepared hollow fiber ultrafiltration membrane ...
Example Embodiment
[0031] Example 2:
[0032] Nitrogen doped nano Cu 2 The content of O was reduced from 3.0%(w / w) to 0.1%(w / w), and the content of dimethylacetamide was increased from 62.0%(w / w) to 64.9%(w / w), and the rest was the same as the example 1. Nitrogen-doped nano Cu 2 The pure water flux of O visible light catalyzed hollow fiber ultrafiltration membrane is 302.12 L / m 2 ·Hr·0.1MPa, the rejection rate of bovine serum protein is 92.69%, the resistance increase coefficient is 1.77, the contact angle is 85.3°; the degradation and removal rate of fulvic acid is increased from 26.76% (no light, running for 1 hour) to 39.04 % (Simulate visible light, run for 1 hour).
Example Embodiment
[0033] Example 3:
[0034] Nitrogen doped nano Cu 2 The content of O was increased from 3.0%(w / w) to 5.0%(w / w), and the content of dimethylacetamide was reduced from 62.0%(w / w) to 60.0%(w / w), and the rest was the same as the example 1. Nitrogen-doped nano Cu 2 The pure water flux of O visible light catalyzed hollow fiber ultrafiltration membrane is 341.41 L / m 2 ·Hr·0.1MPa, the rejection rate of bovine serum protein is 91.56%, the resistance increase coefficient is 1.36, the contact angle is 73.1°; the degradation and removal rate of fulvic acid is increased from 41.79% (no light, running for 1 hour) to 65 . 64% (under simulated visible light, running for 1 hour).
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