Nitrogen-doped and carbon-coated magnetic nanoparticle composite microspheres and preparation method thereof
A technology of magnetic nanoparticles and nitrogen-doped carbon, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as complex synthesis technology, and achieve easy reunion, absorption frequency bandwidth, Effects that are easy to prepare in large quantities
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Embodiment 1
[0030] Step 1: Measure 15ml of glycerin into a beaker filled with 85ml of isopropanol, and stir well. Weigh 0.404g Fe(NO) 3 9H 2 O was added to the above solution, stirred under ultrasonic conditions for 10 min, then poured into a reaction kettle, and reacted at a reaction temperature of 200° C. for 12 h. After the reaction, the product was centrifuged and washed with alcohol several times, and the washed solid product was dried in an oven at a drying temperature of 70°C to finally obtain the iron glycerol precursor.
[0031] Step 2: Dissolve 1.0g of PEG-800 in 100ml of water, transfer the solution into a 250ml three-necked flask, then weigh 0.1g of the iron glycerol precursor in step 1 and add it into it, and continue stirring for 1h until the formation of Uniform suspension; slowly inject 0.1g of pyrrole into the above system, and after stirring for 1h, slowly add 15ml of 0.2mol / L FeCl prepared in advance dropwise 3 Solution, continue to react for 2h, after the reaction i...
Embodiment 2
[0036] Step 1: Measure 5ml of glycerin into a beaker filled with 25ml of isopropanol, and stir well. Weigh 0.200g of cobalt oxalate and add it to the above solution, stir for 10 minutes under ultrasonic conditions, pour it into a reaction kettle, and react at a reaction temperature of 120° C. for 16 hours. After the reaction, the product was centrifuged and washed with alcohol several times, and the washed solid product was dried in an oven at a drying temperature of 60°C to finally obtain the cobalt glycerol precursor.
[0037] Step 2: Measure 0.5g of polyvinylpyrrolidone (PVP) and dissolve it in 100ml of water, transfer the solution into a 250ml three-neck flask, then weigh 0.15g of the iron glycerol precursor in step 1 and add it, and continue stirring under ultrasonic conditions 0.5h until a uniform suspension is formed; slowly inject 0.15g of aniline into the above system, and after stirring for 2h, slowly add 10ml of 0.1mol / L ammonium persulfate solution prepared in adva...
Embodiment 3
[0039] Step 1: Measure 25ml of glycerin into a beaker filled with 200ml of isopropanol, and stir well. Weigh 0.5g of ferric nitrate and 0.5g of cobalt nitrate and add to the above solution, stir for 10min under ultrasonic conditions, pour into the reaction kettle, and react at the reaction temperature of 160°C for 6h. After the reaction, the product was centrifuged and washed with alcohol several times, and the washed solid product was dried in an oven at a drying temperature of 80°C to finally obtain the iron-cobalt glycerol precursor.
[0040] Step 2: Take 2.0g of cetyltrimethylammonium bromide (CTAB) and dissolve it in 100ml of water, transfer the solution into a 250ml three-neck flask, then weigh 0.2g of the glycerol iron cobalt precursor in step 1 and add it , under ultrasonic conditions, continue to stir for 1.5h to form a uniform suspension; slowly inject 0.4g of pyrrole into the above system, and after stirring for 1h, slowly add 15ml of 0.4mol / L hydrogen peroxide solu...
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