Method for purifying Fe3O4 nano-particles taking oleic acid as ligand and synthesizing magnetic nano-stirrers and application
A nanoparticle, magnetic nanotechnology, applied in the direction of nanotechnology, magnetic materials, magnetic objects, etc. for materials and surface science
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Embodiment 1
[0052] A kind of Fe with oleic acid as ligand 3 o 4 A method for purifying nanoparticles and synthesizing a magnetic nanostirrer, comprising the following steps:
[0053] (1) Weigh 3.65g of sodium oleate and add it to a mixed solution of 28mL ethanol, deionized water, and n-hexane, stir until fully dissolved, then add 1.08g of ferric chloride hexahydrate, heat to 70°C and reflux for 4h . After cooling to room temperature, extract with 10mL of water, rotary steam the extracted solution to obtain a reddish-brown waxy solid which is iron oleate mixture, then stir the mixture with 20.57g of oleic acid and octadecene, and heat to 320 Keep at ℃ for 30min, cool to room temperature, precipitate nanospheres with 50mL ethanol, and disperse the precipitate with 50mL chloroform to obtain Fe with a particle size of 10nm 3 o 4 nanosphere solution.
[0054] (2) Analyze the physical properties of the by-products produced in the synthesis of magnetic nanoparticles, so as to formulate thei...
Embodiment 2
[0060] A kind of Fe with oleic acid as ligand 3 o 4 The method for purifying and synthesizing the magnetic nano-stirrer of nanoparticles comprises the following steps:
[0061] (1) Add 0.706g iron acetylacetonate to 10.4g oleic acid, 4-phenylbenzoic acid, dibenzyl ether mixed solution, put it in a three-neck round bottom flask, keep it for 1h, then heat it to 290°C for 30min, cool to At room temperature, wash with a mixed solution of 40mL toluene and 10mL n-hexane, centrifuge and disperse to obtain 25nm Fe 3 o 4 nanocube.
[0062] (2) Measure Fe in 1mL step (1) 3 o 4 The nanocube solution was dispersed in 3mL of toluene and soaked for 36h.
[0063] (3) Fe processed by step (2) 3 o 4 The nanocubes were centrifuged at 500 g, and the resulting precipitate was dispersed in 1 mL of chloroform to obtain Fe 3 o 4 A solution of nanocubes.
[0064] (4) 500 μL of Fe from step (3) 3 o 4 Nanocube solution, 0.3g of citric acid, 12mL of a mixed solution of 1,2-dichlorobenzene a...
Embodiment 3
[0067] A kind of Fe with oleic acid as ligand 3 o 4 The method for purifying and synthesizing the magnetic nano-stirrer of nanoparticles comprises the following steps:
[0068] (1) 10nm Fe 3 o 4 The preparation method of the nanosphere solution is the same as in Example 1.
[0069] (2) The nanosphere soaking method is the same as in Example 1.
[0070] (3) Fe processed by step (2) 3 o 4 The nanosphere solution was centrifuged at 500 g, and the obtained precipitate was dispersed in 1 mL of chloroform to obtain Fe 3 o 4 solution of nanospheres.
[0071] (4) The ligand exchange method of the nanosphere solution is the same as in Example 1.
[0072] (5) The assembly process is the same as that in Example 1. A nano-stirrer with a width of ~50nmm and a length of ~280nm was obtained.
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Abstract
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