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A kind of preparation method and application of rice granular nano-magnetic iron oxide

A nano-magnetic and iron oxide technology, which is applied in the preparation of rice granular nano-magnetic iron oxides and iron oxides, achieving the effects of low production cost, narrow product distribution, and simple and feasible methods

Active Publication Date: 2017-11-24
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are relatively few reports on the construction of large aspect ratio iron oxides, especially rice-shaped iron oxide nanoparticles with monodispersity and good crystallization.

Method used

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  • A kind of preparation method and application of rice granular nano-magnetic iron oxide
  • A kind of preparation method and application of rice granular nano-magnetic iron oxide
  • A kind of preparation method and application of rice granular nano-magnetic iron oxide

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Experimental program
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Effect test

Embodiment 1

[0026] Iron oxyhydroxide was prepared by hydrolysis.

[0027] Anhydrous FeCl 3 and cetyltrimethylammonium chloride were dissolved in 30 mL deoxygenated water, stirred to obtain a transparent solution, and FeCl 3 The concentration of cetyltrimethylammonium chloride is 0.1 mol / L, and the concentration of cetyltrimethylammonium chloride is 0.05 mol / L. Then the two solutions were mixed, stirred magnetically at 40°C for 12 hours, and the reaction was completed, the resulting reaction solution was centrifuged, the supernatant was removed, and then washed with deoxygenated water three times, then washed with absolute ethanol, centrifuged, and kept overnight at 50°C After drying, the yellow iron oxyhydroxide with a rice grain-like aspect ratio of 4:1 was obtained at last.

[0028] The iron oxyhydroxide obtained above was burned in vacuum at 200°C for 4 hours to obtain Fe with a red rice grain aspect ratio of 4:1. 2 o 3 Nanoparticles.

[0029] figure 1 It is a scanning electron m...

Embodiment 2

[0031] Iron oxyhydroxide was prepared by hydrolysis.

[0032] Will Fe 2 (SO 4 ) 3and sodium dodecylbenzenesulfonate were dissolved in 30 mL deoxygenated water, and stirred to obtain a transparent solution, and Fe 2 (SO 4 ) 3 The concentration of sodium dodecylbenzenesulfonate is 0.2 mol / L, and the concentration of sodium dodecylbenzenesulfonate is 0.15 mol / L. Then the two solutions were mixed and magnetically stirred at 80° C. for 4 h. After the reaction is completed, the obtained reaction liquid is centrifuged, the supernatant is removed, and the product is washed three times with deoxygenated water, then washed with absolute ethanol, centrifuged, and dried overnight at 50°C, and finally the rice grain with an aspect ratio of 8 is obtained. :1 yellow iron oxyhydroxide.

[0033] Burn the iron oxyhydroxide obtained above at 300°C for 3 hours in a vacuum to obtain Fe with a red rice grain aspect ratio of 8:1. 2 o 3 Nanoparticles.

Embodiment 3

[0035] Iron oxyhydroxide was prepared by hydrolysis.

[0036] FeCl 3 ·6H 2 O and dodecyltrimethylammonium bromide were dissolved in 30 mL deoxygenated water, respectively, and stirred to obtain a transparent solution to obtain FeCl 3 ·6H 2 The concentration of O was 0.1 mol / L, and the concentration of dodecyltrimethylammonium bromide was 0.2 mol / L. Then the two solutions were mixed and magnetically stirred at 50° C. for 10 h. After the reaction is completed, the resulting reaction solution is centrifuged, the supernatant is removed, and the product is washed three times with deoxygenated water, then washed with absolute ethanol, centrifuged, and dried overnight at 50° C., finally obtaining a yellow rice grain with an aspect ratio of 6:1 iron oxyhydroxide.

[0037] The iron oxyhydroxide obtained above was burned in hydrogen at 400°C for 2 hours to obtain black rice-like Fe with an aspect ratio of 6:1. 3 o 4 Nanoparticles.

[0038] image 3 It is the Fe prepared in Exam...

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Abstract

The invention discloses a preparation method of rice granular nano-magnetic iron oxide, comprising the following steps: dissolving iron salt and anionic surfactant in deionized water respectively, stirring to obtain a transparent solution, and then mixing the two solutions for reaction, magnetic Stir; centrifuge the above reaction solution, remove the supernatant, wash, and dry to obtain rice-shaped oxyhydroxide; heat-treat the rice-shaped oxyhydroxide in a certain temperature and atmosphere to obtain rice-shaped nano-magnetic iron oxide things. The preparation method of the rice-shaped nano-magnetic iron oxide of the present invention obtains the rice-shaped iron oxyhydroxide with a uniform structure through magnetic stirring, and obtains the perfect rice-shaped nano-magnetic iron oxide through different heat treatments; the method of the present invention is simple and feasible, and the production cost is low. Low, strong controllability, can control the aspect ratio of rice granular iron oxide, the product distribution is narrow, high yield, high purity, high saturation magnetization.

Description

technical field [0001] The invention belongs to the field of preparation of iron oxides, and relates to a preparation method of iron oxides, in particular to a preparation method and application of rice-shaped nano-magnetic iron oxides. Background technique [0002] Iron oxides mainly include Fe 2 0 3 and Fe 3 0 4 , iron oxide nanocomposites with various morphologies have a bright application prospect because of their unique physical and chemical properties such as small size effect, surface effect, and synergistic effect, as well as the characteristics of easy functionalization. The fields of medicine, cosmetics, military and new energy have attracted wide attention. [0003] It is well known that the properties of iron oxides determine their applications. The properties of a particle mainly depend on its size, shape and structure, among which the structure and shape of the particle are the two most critical influencing factors. Therefore, the research on the structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06C01G49/08B82Y40/00
Inventor 赵爱武高倩
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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