Method for preparing surface molecularly imprinted material based on titania nanowires
A surface molecular imprinting, titanium dioxide technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of poor accessibility, slow recognition speed, uneven binding sites, etc., to avoid difficult plasticization, improve selectivity, Good light stabilization
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Embodiment 1
[0015] Example 1: a. Weigh 0.3 g of malathion and dissolve it in 4 mL of methanol solution, add 2 mL of functional monomer 3-aminopropyltriethoxysilane, ultrasonicate for 30 min at room temperature, and place it in a refrigerator at 4°C. Leave overnight, after returning to room temperature, add 4 mL ethyl orthosilicate, stir for 30 min, add 0.5 g titanium dioxide nanowires, stir for 30 min, add 1 ml 1.0 mol / L acetic acid to catalyze hydrolysis condensation. After the above mixture was stirred at 25°C for 40 minutes, it was hydrolyzed and condensed at room temperature for 24 hours, then filtered, and aged at 100°C for 12 hours. In the container, wash repeatedly with methanol-acetic acid (9+1, V+V) for 24 hours to remove template molecules, take out the polymer and place it in a Buchner funnel with two layers of filter paper for suction filtration, wash with water until neutral, and then Wash with 40mL methanol three times, dry at 70°C, store in a desiccator for later use, and o...
Embodiment 2
[0016] Example 2 a. Weigh 0.4 g of malathion and dissolve it in 5 mL of methanol solution, add 1 mL of functional monomer 3-aminopropyltriethoxysilane, sonicate for 30 min at room temperature, and let it stand in a refrigerator at 4°C overnight. After returning to room temperature, 8 mL of ethyl orthosilicate was added, and after stirring for 30 min, 1 g of titanium dioxide nanowires was added, and after stirring for 30 min, 2 ml of 1.0 mol / L acetic acid was added to catalyze the hydrolytic condensation. After the above mixture was stirred at 25°C for 40 minutes, it was hydrolyzed and condensed at room temperature for 24 hours, then filtered, and aged at 120°C for 10 hours. In the container, wash repeatedly with methanol-acetic acid (9+1, V+V) for 24 hours to remove template molecules, take out the polymer and place it in a Buchner funnel with two layers of filter paper for suction filtration, wash with water until neutral, and then Wash with 40mL methanol three times, dry at...
Embodiment 3
[0017] Example 3 a. Weigh 0.3 g of malathion and dissolve it in 4 mL of methanol solution, add 4 mL of functional monomer 3-aminopropyltriethoxysilane, sonicate for 30 min at room temperature, and let it stand in a refrigerator at 4°C overnight. After returning to room temperature, 8 mL of ethyl orthosilicate was added, and after stirring for 30 min, 1 g of titanium dioxide nanowires was added, and after stirring for 30 min, 2 ml of 1.0 mol / L acetic acid was added to catalyze the hydrolysis and condensation. After the above mixture was stirred at 25°C for 40 minutes, it was hydrolyzed and condensed at room temperature for 24 hours, then filtered, and aged at 110°C for 14 hours. In the container, wash repeatedly with methanol-acetic acid (9+1, V+V) for 24 hours to remove template molecules, take out the polymer and place it in a Buchner funnel with two layers of filter paper for suction filtration, wash with water until neutral, and then Wash with 40mL methanol three times, dr...
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