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Method for preparing ferroferric oxide nano sheet

A technology of ferroferric oxide and nanosheets, which is applied in the fields of iron oxide/hydroxide, nanotechnology, nanotechnology, etc., and can solve problems such as difficulty in preparing nanosheet particles, uneven thickness distribution, and long production cycle , to achieve the effects of low raw material cost, short preparation cycle and low product cost

Inactive Publication Date: 2010-09-15
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The physical method generally adopts physical crushing method, mechanical ball milling method, etc., but the thickness distribution of the product is generally uneven, easy to be oxidized, and it is difficult to prepare nano-flaky particles below 5nm
Chemical methods mainly include co-precipitation method, sol-gel method, microemulsion method, hydrothermal method, etc., but generally involve more steps and processes, and the production cycle is longer

Method used

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  • Method for preparing ferroferric oxide nano sheet
  • Method for preparing ferroferric oxide nano sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) under stirring, 2.3353g FeSO 4 ·7H 2 O and 120mL deionized water were mixed thoroughly;

[0022] 2) Add 0.64g of NaOH reagent into 80mL of deionized water, stir fully to dissolve it completely, and then add 6.89g of sodium acetate to the stirred strong alkali aqueous solution;

[0023] 3) While treating the mixed solution in step 2) with an ultrasonic processor, add the aqueous solution in step 1) to the mixed solution in step 2) dropwise, after the addition, continue the ultrasonic reaction for 1 hour to obtain a suspension , the ultrasonic power is controlled at 80W, and the frequency is at 25KHz;

[0024] 4) Filter out the solid phase in the suspension in step 3) with filter paper, wash four times with distilled water and absolute ethanol, and vacuum-dry at 60° C. to obtain ferric oxide nanosheets. looks like figure 1 As shown, it is a two-dimensional sheet with an average thickness of 5 nm or less.

Embodiment 2

[0026] 1) Under stirring, 1.6701g FeCl 2 4H 2 O and 120mL deionized water were mixed thoroughly;

[0027] 2) Add 0.7093g of KOH reagent into 80mL of deionized water, stir fully to dissolve it completely, then add 3.3402g of polyvinylpyrrolidone to the stirred strong alkali aqueous solution;

[0028] 3) While treating the mixed solution in step 2) with an ultrasonic processor, add the aqueous solution in step 1) dropwise to the mixed solution in step 2), after the addition, continue the ultrasonic reaction for 0.5 hours to obtain a suspension , the ultrasonic power is controlled at 120W, and the frequency is at 25KHz;

[0029] 4) Filter out the solid phase in the suspension in step 3) with filter paper, wash with distilled water and absolute ethanol four times respectively, and vacuum-dry at 100° C. to obtain ferric oxide nanosheets. looks like figure 2 As shown, it is a two-dimensional sheet with an average thickness of 5 nm or less.

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Abstract

The invention discloses a method for preparing a ferroferric oxide nano sheet, which comprises the following steps of: dissolving soluble ferrous ion salt in de-ionized water; dissolving strong base in the de-ionized water, and then adding surface active agent; and mixing the two solutions under the ultrasonic condition to react to obtain a suspensoid, extracting the solid phase from the suspensoid, repeatedly washing with distilled water and absolute ethyl alcohol, and then drying in vacuum at 120 DEG C to obtain the Fe3O4 nano sheet. The invention has the characteristics of low reaction temperature, simple process, short production cycle, low cost and high product purity. The obtained nano sheet is a Fe3O4 single-phase two-dimensional sheet, and the thickness is smaller than 5nm on average.

Description

technical field [0001] The invention relates to a method for preparing iron ferric oxide nanosheets. Background technique [0002] With the continuous progress of science and technology, nanotechnology has achieved continuous development. Nanomaterials have attracted more and more attention due to their unique properties different from ordinary bulk materials. Nanostructured ferromagnetic materials have attracted the interest of many researchers due to their wide range of applications, such as ferrofluids, advanced magnetic materials, catalyst raw materials, high-density magnetic storage devices, and biomedicine and biopharmaceuticals. [0003] Fe 3 o 4 It has a certain degree of magnetism, and can move directionally under an external magnetic field. The particle size is small enough to have superparamagnetism within a certain range. Nano Fe 3 o 4 In biomedicine, magnetic nanoparticles are widely used as anticancer drug carriers, which can form a magnetically targeted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08B82B3/00
Inventor 程继鹏马瑞张孝彬刘芙
Owner ZHEJIANG UNIV
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