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Controllable preparation and modification method of nickel ferrite nanoparticles

A nanoparticle, nickel ferrite technology, applied in the field of materials, can solve the problems of difficult storage, easy agglomeration and sedimentation of nanoparticles

Active Publication Date: 2021-09-07
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, considering that nickel ferrite magnetic nanoparticles are easy to oxidize in aqueous solution, and easy to agglomerate and settle in organic solvents, this makes it difficult for the use and storage of nanoparticles in different occasions.

Method used

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  • Controllable preparation and modification method of nickel ferrite nanoparticles
  • Controllable preparation and modification method of nickel ferrite nanoparticles
  • Controllable preparation and modification method of nickel ferrite nanoparticles

Examples

Experimental program
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Effect test

Embodiment 1

[0036] 1) Add 0.78g iron (III) acetylacetonate, 0.56g nickel (II) acetylacetonate, 0.9g sodium oleate, 6ml oleic acid, and 30mL benzyl ether solution into a 100mL three-necked reaction flask, stir to dissolve, and N 2 Under protection, the temperature was raised to 295° C. at a rate of 6° C. / min, and reacted for 1 hour to produce black nickel ferrite particle crystals with a mass of about 0.42 g.

[0037] 2) Take the above reaction product, use centrifugation, add an appropriate amount of n-hexane to wash, and then use centrifugation to repeat five times to obtain nickel ferrite nanoparticles coated with oleic acid.

[0038] Such as figure 2 As shown, the X-ray diffraction pattern shows that the black solid prepared in the present embodiment is nickel ferrite nanoparticles; the transmission electron microscope image of preparing nanoparticles is as follows image 3 As shown in (a), it can be seen from the figure that the size distribution of the nanoparticles is relatively ...

Embodiment 2

[0042] 1) Add 1.162g iron (III) acetylacetonate, 0.283g nickel (II) acetylacetonate, 0.9g sodium oleate, 6ml oleic acid, and 30mL benzyl ether solution into a 100mL three-necked reaction flask, stir to dissolve, and N 2Under protection, the temperature was raised to 295° C. at a rate of 6° C. / min, and reacted for 1 hour to produce black nickel ferrite particle crystals with a mass of about 0.42 g.

[0043] 2) Take 1 mL of oleic acid-coated nickel ferrite nanoparticles (about 10 mg), use centrifugation, add an appropriate amount of n-hexane to wash, and use centrifugation to repeat five times.

[0044] Such as figure 2 As shown, the X-ray diffraction pattern shows that the black solid prepared in the present embodiment is nickel ferrite nanoparticles; the transmission electron microscope image of preparing nanoparticles is as follows image 3 As shown in (b), it can be seen from the figure that the size distribution of the nanoparticles is relatively uniform, and the diamete...

Embodiment 3

[0048] 1) Add 1.27g iron (III) acetylacetonate, 0.19g nickel (II) acetylacetonate, 0.9g sodium oleate, 6ml oleic acid, and 30mL benzyl ether solution into a 100mL three-necked reaction flask, stir to dissolve, and N 2 Under protection, the temperature was raised to 295° C. at a rate of 6° C. / min, and reacted for 1 hour to produce black nickel ferrite particle crystals with a mass of about 0.42 g.

[0049] 2) Take 1 mL of oleic acid-coated nickel ferrite nanoparticles (about 10 mg), use centrifugation, add an appropriate amount of n-hexane to wash, and use centrifugation to repeat five times.

[0050] Such as figure 2 As shown, the X-ray diffraction pattern shows that the black solid prepared in this embodiment is nickel ferrite nanoparticles; the transmission electron microscope image of the magnetic nickel ferrite nanoparticles body prepared is as follows image 3 As shown in (c), it can be seen from the figure that the size distribution of the nanoparticles is relatively ...

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Abstract

The invention provides a controllable preparation and modification method of nickel ferrite nanoparticles, wherein the method comprises the steps: by taking ferric acetylacetonate, nickel acetylacetonate, oleic acid, sodium oleate and benzyl ether as raw materials, heating and reacting under the protection of nitrogen or inert gas to obtain oleic acid modified nickel ferrite nanoparticles, wherein the proportion of nickel and iron atoms in the nanoparticles can be regulated and controlled by regulating the proportion of reactants. Furthermore, the nickel ferrite nanoparticles with the surfaces modified by polystyrene are obtained by reacting in a tetrahydrofuran solution in which polystyrene is dissolved after oleic acid on the surfaces is removed through alcohol centrifugation. The nickel ferrite nanoparticles prepared by the method have good monodispersity, good dispersity in water and superparamagnetism, and are expected to be applied to the fields of magnetic data storage, thermal therapy, magnetic resonance imaging and the like. In addition, the modified nickel ferrite nanoparticles can be dispersed in a tetrahydrofuran solution for a long time, the purpose of converting a water phase into an oil phase is achieved, and the nickel ferrite nanoparticles are convenient to store and further use.

Description

technical field [0001] The invention belongs to the field of materials. Specifically, the invention relates to a controllable preparation and modification method of nickel ferrite nanoparticles with good dispersion in tetrahydrofuran (THF). [0002] technical background [0003] Ferrite magnetic nanoparticles have high application value in the fields of magnetic data storage, hyperthermia therapy, and magnetic resonance imaging (MRI), and have attracted widespread attention. Nickel ferrite nanoparticles, the chemical formula is Ni x Fe 3-x o 4 , is a kind of ferrite magnetic nanoparticles. Currently, about Co x Fe 3-x o 4 , Mn x Fe 3-x o 4 , Fe 3 o 4 The research is relatively mature, and the synthesis of Ni x Fe 3-x o 4 relatively few studies. However, nickel ferrite nanoparticles show good performance in soft magnets and low loss materials, especially in the high frequency range, so it is necessary to develop an efficient and controllable preparation method t...

Claims

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Application Information

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IPC IPC(8): C01G53/00C01G49/00
CPCC01G53/00C01G49/0018C01P2002/72C01P2004/04C01P2002/80C01P2002/88C01P2002/82C01P2006/42
Inventor 谢勇赵鹏胡同华
Owner BEIHANG UNIV
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