A kind of ph-magnetic dual-responsive dye adsorbent, preparation method and application thereof
A responsive and adsorbent technology, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., to achieve the effects of simple operation process, high raw material utilization rate, good pH and magnetic responsiveness
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Embodiment 1
[0026] 1) One for preparing Fe 3 O 4 The step of nanoparticle dispersion liquid, 12g FeCl 3 .6H 2 O, 10g FeCl 2 .4H 2 O, 40g deionized water was mixed in a three-necked flask, the mechanical stirring speed was 300rpm, the room temperature was stirred with nitrogen for 30min, then the temperature was raised to 80℃ and 37mL NH was added. 3 .H 2 O, stirring for 30 min, adding 7 mL of oleic acid, stirring under nitrogen protection for 2 hours, then stopping the reaction, cooling to room temperature and washing and separating to obtain Fe 3 O 4 Nanoparticle dispersion;
[0027] 2) A step of preparing Pickering emulsion, take the 1g Fe obtained in step (1) 3 O 4 The nanoparticle dispersion (solid content is 55%) is uniformly sonicated and placed in a 100mL beaker. 35g of deionized water, 2g of crosslinking agent 1,6-hexanediol diacrylate, 0.1g of photoinitiator and 1.5g of methylbenzene are added. Diethylaminoethyl acrylate, the mixture was pulverized in 400W ultrasonic cells for 10 min,...
Embodiment 2
[0031] 1) One for preparing Fe 3 O 4 The step of nanoparticle dispersion, 16g FeCl 3 .6H 2 O, 15g FeCl 2 .4H 2 O, 60g deionized water was mixed in a three-necked flask, the mechanical stirring speed was 500rpm, and after stirring for 50min with nitrogen at room temperature, the temperature was raised to 80℃ and 42mL NH was added. 3 .H 2 O, stir for 50min, add 10mL oleic acid, stir for 4h under nitrogen protection, stop the reaction, cool to room temperature, wash and separate three times to obtain Fe 3 O 4 Magnetic fluid
[0032] 2) A step of preparing Pickering emulsion, take 1.5g of nanoparticle dispersion (solid content of 65%) obtained in step (1) and place it in a 100ml beaker, add 60g of deionized water and 3g of crosslinking agent 1 ,6-Hexanediol diacrylate, 0.15g photoinitiator and 4g diethylaminoethyl methacrylate, the mixture was pulverized in 400W ultrasonic cells for 15min, homogenized for 5min, then poured into a 100mL three-necked flask, rotating speed At 500rpm, sti...
Embodiment 3
[0036] 1) One for preparing Fe 3 O 4 The step of nanoparticle dispersion, add 14g FeCl 3 .6H 2 O, 12g FeCl 2 .4H 2 O, 50g deionized water was mixed in a three-necked flask, the mechanical stirring speed was 400rpm, the room temperature was stirred with nitrogen for 35min, then the temperature was raised to 80℃ and 38mL NH was added. 3 .H 2 O, stir for 35min, add 8mL oleic acid, stir under nitrogen protection for 3h, then stop the reaction, cool to room temperature, wash and separate three times to obtain Fe 3 O 4 Nanoparticle dispersion;
[0037] 2) A step to prepare Pickering emulsion, take the 1.17g Fe obtained in step (1) 3 O 4 The nanoparticle dispersion (solid content is 60%) is uniformly sonicated and placed in a 100mL beaker. Add 45g deionized water, 2.5g crosslinking agent 1,6-hexanediol diacrylate, 0.13g photoinitiator and 4g methylbenzene. Diethylaminoethyl acrylate, the mixture was pulverized in a 400W ultrasonic cell for 12min, homogenized for 4min, then poured into a 1...
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