Vulcanizing-agent-modified Fe3O4 magnetic nanoparticle adsorbent and preparation method and application thereof
A magnetic nanometer and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, inorganic chemistry, etc., can solve the problems of complex solid-liquid separation, unstable sedimentation, low processing capacity, etc., and achieve large adsorption capacity , simple preparation process and easy recovery
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Embodiment 1
[0028] Weigh 2.7g FeCl 3 ·6H 2 O, 7.2g anhydrous sodium acetate and 3g polyethylene glycol PEG 1000 Ultrasonic treatment in a beaker containing 80ml of ethylene glycol solution for 30min, then transferred to a 100ml high-temperature reaction kettle, reacted at 200°C for 8h, after cooling, the precipitate was washed repeatedly with absolute ethanol, and the sample was kept under the condition of a vacuum of -1Mpa Drying under , the magnetic nano-Fe 3 o 4 ;
[0029] Weigh 0.5g magnetic nano-Fe 3 o 4 Place in the reactor that fills 60ml ethylene glycol solution, configure 40ml vulcanizing agent solution simultaneously (sulfur 0.1g, PEG 1000 2g). The vulcanizing agent solution was injected into the reactor at 2.8 μl / s, and the magnetic nanoparticles were vulcanized at 180° C. under the protection of nitrogen.
[0030] After the injection is completed, the adsorbent is separated from the solution by magnetic separation, washed with absolute ethanol, and dried under vacuum a...
Embodiment 2
[0033] Weigh 4.0g Fe(NO) 3 9H 2 O, 5.2g urea and 3g polyethylene glycol PEG 1000 In a beaker containing 60ml of ethylene glycol solution, ultrasonically treat for 30min, then transfer to a 100ml autoclave, react at 200°C for 8h, after cooling, the precipitate is washed repeatedly with absolute ethanol, and dried in vacuum to obtain magnetic nano-Fe 3 o 4 ;
[0034] Weigh 0.5g magnetic nano-Fe 3 o 4 Place in a reactor filled with 60ml triethylene glycol solution, and configure 40ml vulcanizing agent solution (thiourea 0.2g, ammonium citrate 0.47g) at the same time. The vulcanizing agent solution was injected into the reactor at 5.6 μl / s, and the magnetic nanoparticles were vulcanized at 270° C. under the protection of nitrogen.
[0035]After the injection is completed, the adsorbent is separated from the solution by magnetic separation, washed with absolute ethanol, and dried under vacuum at room temperature. It is detected that the loading amount of FeS on the surface o...
Embodiment 3
[0038] Weigh 2.7g FeCl 3 ·6H 2 O, 5.2g ethylenediamine and 2g polyethylene glycol PEG 1000 Ultrasonic treatment in a beaker containing 60ml of propylene glycol solution for 30min, then transferred to a 100ml autoclave, reacted at 200°C for 6h, after cooling, the precipitate was repeatedly washed with absolute ethanol, and dried in vacuum to obtain magnetic nano-Fe 3 o 4 ;
[0039] Weigh 0.5g magnetic nano-Fe 3 o 4 Place in a reactor filled with 60ml of propylene glycol solution, and configure 40ml of vulcanizing agent solution (2.36ml of n-dodecanethiol, 0.57g of trisodium citrate) at the same time. The vulcanizing agent solution was injected into the reactor at 5.6 μl / s, and the magnetic nanoparticles were vulcanized at 180° C. under the protection of nitrogen.
[0040] After the injection is completed, the adsorbent is separated from the solution by magnetic separation, washed with absolute ethanol, and dried under vacuum at room temperature. It is detected that the l...
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