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Nanometer ferroferric oxide core-carbon meso pore hollow shell complex, as well as preparation method and application thereof

A technology of ferroferric oxide and carbon mesoporous, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problem of increased discharge of organic sewage, small specific surface area, unfavorable water pollution To solve the problems of adsorption of substances, to achieve strong adsorption capacity, scientific preparation method, and increase the effect of specific surface area

Inactive Publication Date: 2012-08-29
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

However, both carboxylated magnetic carbon nanospheres and their preparation methods have shortcomings. First, the specific surface area of ​​carboxylated magnetic carbon nanospheres is small, which is not conducive to the adsorption of pollutants in water, especially At present, with the rapid development of the economy, the discharge of organic sewage is showing an unfavorable trend of increasing year by year; secondly, the preparation method cannot obtain the final product with a higher specific surface area

Method used

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  • Nanometer ferroferric oxide core-carbon meso pore hollow shell complex, as well as preparation method and application thereof
  • Nanometer ferroferric oxide core-carbon meso pore hollow shell complex, as well as preparation method and application thereof
  • Nanometer ferroferric oxide core-carbon meso pore hollow shell complex, as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0032] The concrete steps of preparation are:

[0033] Step 1, first mix n-hexane, ethanol, deionized water, ferric chloride, oleic acid and sodium hydroxide, and react at 60°C for 4.4h; among them, n-hexane, ethanol, deionized water and oleic acid The volume ratio between them is 7:4:3:0.23, and the molar ratio between ferric chloride, oleic acid and sodium hydroxide is 1:3:3, so as to obtain the iron oleate precursor. Then the ferric oleate precursor, octadecene and oleic acid were mixed according to the molar ratio of 2:1:37, and refluxed at 310°C for 30 minutes, centrifuged and washed to obtain an approximate figure 1 The iron ferric oxide nanocrystal shown in a; wherein, the rotation speed during the centrifugation treatment is 10000r / min, and the washing treatment is to wash once with absolute ethanol.

[0034] Step 2, first disperse nonylphenol polyoxyethylene ether in cyclohexane to obtain nonylphenol polyoxyethylene ether cyclohexane solution; then ultrasonically dis...

Embodiment 2

[0039] The concrete steps of preparation are:

[0040] Step 1, first mix n-hexane, ethanol, deionized water, ferric chloride, oleic acid and sodium hydroxide, and react at 65°C for 4.3h; among them, n-hexane, ethanol, deionized water and oleic acid The volume ratio between them is 7:4:3:0.23, and the molar ratio between ferric chloride, oleic acid and sodium hydroxide is 1:3:3, so as to obtain the iron oleate precursor. Then the ferric oleate precursor, octadecene and oleic acid were mixed according to the molar ratio of 2:1:37, and after reflux at 315°C for 28 minutes, centrifuged and washed to obtain an approximate figure 1 The iron ferric oxide nanocrystal shown in a; wherein, the rotation speed during the centrifugation treatment is 10000r / min, and the washing treatment is washed twice with absolute ethanol.

[0041] Step 2, first disperse nonylphenol polyoxyethylene ether in cyclohexane to obtain nonylphenol polyoxyethylene ether cyclohexane solution; then ultrasonically...

Embodiment 3

[0046] The concrete steps of preparation are:

[0047]Step 1, first mix n-hexane, ethanol, deionized water, ferric chloride, oleic acid and sodium hydroxide, and react at 70°C for 4.2h; among them, n-hexane, ethanol, deionized water and oleic acid The volume ratio between them is 7:4:3:0.23, and the molar ratio between ferric chloride, oleic acid and sodium hydroxide is 1:3:3, so as to obtain the iron oleate precursor. Then the ferric oleate precursor, octadecene and oleic acid were mixed according to the molar ratio of 2:1:37, and refluxed at 320°C for 25 minutes, centrifuged and washed to obtain the following: figure 1 The iron ferric oxide nanocrystal shown in a; wherein, the rotation speed during the centrifugation treatment is 10000r / min, and the washing treatment is to use absolute ethanol to wash 3 times.

[0048] Step 2, first disperse nonylphenol polyoxyethylene ether in cyclohexane to obtain nonylphenol polyoxyethylene ether cyclohexane solution; then ultrasonically...

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Abstract

The invention discloses a nanometer ferroferric oxide core-carbon meso pore hollow shell complex, as well as a preparation method and application thereof. The complex is formed by ferroferric oxide particles and a carbon shell sleeved and sealed outside, wherein the carbon sheel is of a mesoporous structure with the hole diameter being 1-5nm; the grain size of the ferroferric oxide particles is 8-12nm; the external diameter of a carbon mesoporous shell is 80-100nm; the thickness of the shell is 10-20nm; and the diameter of a hollow part between the ferroferric oxide and the carbon mesoporous shell is 30-60nm. The preparation method comprises the following steps of: synthetizing ferroferric oxide nanometer nanometers through a high-temperature reflux method, using a microemulsion method to obtain a ferroferric oxide core silicon dioxide shell powder body; then depositing a layer of mesoporous silicon dioxide on the surface of a silicon dioxide shell through a chemical method to obtain a three-layer core shell structure; taking the three-layer core shell structure as a hard template, and depositing carbon in clearances of the mesoporous silicon dioxide; and finally, etching the silicon dioxide by utilizing strong alkali solution, thereby obtaining a target product. The nanometer ferroferric oxide core-carbon meso pore hollow shell complex can be used for carrying out adsorption processing in solution polluted by methylthionine chloride, congo red or phenol.

Description

technical field [0001] The invention relates to a composite body, a preparation method and application thereof, in particular to a nano-iron ferric oxide core-carbon mesoporous hollow shell composite body, a preparation method and application thereof. Background technique [0002] As we all know, although carbon nanoparticles have a large specific surface area and high adsorption performance, they also have the disadvantage that the smaller the particle size, the harder it is to separate. Magnetic nanoparticles have superparamagnetism that is different from conventional magnetic materials. They can be separated and recovered by using an external magnetic field. After the external magnetic field disappears, they can restore the high dispersion of the particles; however, it has a specific surface area or adsorption capacity. Defects that are small and applicable to a narrow pH range. In order to make carbon nanoparticles and magnetic nanoparticles complement each other, seek ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
Inventor 张云霞许思超丁华霖潘书生罗媛媛李广海
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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