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Preparation method of magnetic carbon nanocomposite

A nanocomposite material and magnetic nanotechnology, applied in the field of preparation of magnetic carbon nanocomposite materials, can solve the problems of pore volume reduction, blockage of pore space, reduction of specific surface area, etc., and achieve good adsorption effect and simple and rapid separation effect

Inactive Publication Date: 2015-09-23
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such synthetic methods may result in massive blockage of pore space, reduced specific surface area, reduced pore volume, and distorted pore structure.

Method used

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  • Preparation method of magnetic carbon nanocomposite
  • Preparation method of magnetic carbon nanocomposite
  • Preparation method of magnetic carbon nanocomposite

Examples

Experimental program
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Embodiment 1

[0028] The preparation method of embodiment 1 magnetic carbon nanocomposite material

[0029] (1) Preparation method

[0030] 1) Weigh FeCl 3 and FeCl 2(molar ratio is 2:1), dissolved in deionized water, adjusted to pH = 9 with 0.5mol / L ammonia water, mechanically stirred for 0.5h at 90°C, filtered with suction, washed with deionized water until neutral, and dried in vacuum , to obtain black crystal Fe 3 o 4 Nanoparticles.

[0031] 2) Weigh 0.4g polyvinyl alcohol, add 20mL deionized water, heat to 90°C until completely dissolved, then add 0.1g Fe 3 o 4 Nanoparticles, stirred mechanically for 3h, obtained Fe modified by polyvinyl alcohol 3 o 4 Nanoparticles.

[0032] 3) Mix urea and formaldehyde at a molar ratio of 1:3 (the urea is 1.5g), add 15mL of deionized water, adjust the pH to 8 with NaOH, stir magnetically, and prepolymerize at room temperature for 3h. Then adjust to pH=5 with HCl, add polyvinyl alcohol modified Fe 3 o 4 Nanoparticles, stirred at room temper...

Embodiment 2

[0040] The preparation method of embodiment 2 magnetic carbon nanocomposites

[0041] 1) Weigh FeCl 3 and FeCl 2 (molar ratio is 2:1), dissolved in deionized water, stirred mechanically, and adjusted pH=9 with 0.5mol / L ammonia water, stirred mechanically for 0.5h at 90°C, filtered with suction, washed the solid with deionized water until neutral , dried under vacuum to obtain black crystalline Fe 3 o 4 Nanoparticles.

[0042] 2) Weigh 0.4g polyvinyl alcohol, add 20mL deionized water, heat to 90°C until completely dissolved, then add 0.1g Fe 3 o 4 Nanoparticles, stirred mechanically for 3h, obtained Fe modified by polyvinyl alcohol 3 o 4 Nanoparticles.

[0043] 3) Mix urea and formaldehyde at a molar ratio of 1:3 (1.4 g of urea), add 15 mL of deionized water, adjust pH to 8 with NaOH, magnetically stir, and prepolymerize at room temperature for 3 h. Then adjust pH=5 with HCl, add polyvinyl alcohol modified Fe 3 o 4 Nanoparticles, stirred at room temperature for 18h, ...

Embodiment 3

[0045] The preparation method of embodiment 3 magnetic carbon nanocomposites

[0046] 1) Weigh FeCl 3 and FeCl 2 (molar ratio is 2:1), dissolved in deionized water, stirred mechanically, and adjusted pH=9 with 0.5mol / L ammonia water, stirred mechanically for 0.5h at 90°C, filtered with suction, washed the solid with deionized water until neutral , dried under vacuum to obtain black crystalline Fe 3 o 4 Nanoparticles.

[0047] 2) Weigh 0.3g polyvinyl alcohol, add 20mL deionized water, heat to 90°C until completely dissolved, then add 0.1g Fe 3 o 4 Nanoparticles, stirred mechanically for 3h, obtained Fe modified by polyvinyl alcohol 3 o 4 Nanoparticles.

[0048] 3) Mix urea and formaldehyde at a molar ratio of 1:3 (1.5 g of urea), add 15 mL of deionized water, adjust pH=8 with NaOH, magnetically stir, and prepolymerize at room temperature for 3 h. Then adjust pH=5 with HCl, add polyvinyl alcohol modified Fe 3 o 4 Nanoparticles, stirred at room temperature for 18h, the...

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Abstract

The invention relates to a preparation method of magnetic carbon nanocomposite. Fe3O4 nano particles are firstly prepared by a coprecipitation method and then are modified by polyvinyl alcohol; urea and formaldehyde as monomers are pre-polymerized under an alkaline condition, and then the modified Fe3O4 nano particles are subjected to polycondensation coating under an acidic condition, so that a urea resin-coated Fe3O4 composite is obtained; a product is subjected to suction filtration, is washed to be neutral, and is vacuum-dried; the obtained composite is carbonized at 600 DEG C under the protection of N2, so that the magnetic carbon nanocomposite is prepared. The prepared magnetic carbon nanocomposite has a good adsorption effect on methylthionine chloride; simple and fast separation can be realized by magnetism.

Description

technical field [0001] Magnetic material is a kind of functional material which has been used for a long time and is very extensive. The excellent properties of new magnetic composite materials are used in various fields such as biomedicine, magnetic conduction, and materials. Background technique [0002] At present, there are many ways to prepare magnetic carbon spheres, such as adding ferric salt (John D.Atkinson, Maria E.Fortunato, Seyed A.Dastgheib, et al.Synthesis and characterization) to activated carbon slurry (or carbon nanotubes) of iron-impregnated porous carbon spheres prepared by ultrasonic spray pyrolysis. Carbon, 2011, 49:587-598) and sodium hydroxide, followed by calcination. Such synthetic methods may result in massive blockage of pore spaces, reduced specific surface area, reduced pore volume, and distorted pore structures. There is also a preparation scheme for aminated magnetic carbon nanospheres. The prepared nanospheres have a core-shell structure: th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J20/28C02F1/28
Inventor 关宏宇王登科裴双凤张向东葛春华
Owner LIAONING UNIVERSITY
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