Controllable preparation method for high-power ultrasound-assisted nanoscale plate-shaped Fe3O4

An ultrasonic-assisted, nano-scale technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of uncontrollable nucleation and growth, narrow particle size distribution, etc. Controllable growth process, high crystallinity of particles, and controllable morphology

Inactive Publication Date: 2014-01-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the invention is to provide a kind of high-power ultrasonic assisted nano-scale plate-shaped Fe 3 o 4 The controllable preparation method solves the problem of uncontrollable nucleation and growth. The prepared nano-sized particles have a very narrow particle size distribution and high phase purity.

Method used

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  • Controllable preparation method for high-power ultrasound-assisted nanoscale plate-shaped Fe3O4
  • Controllable preparation method for high-power ultrasound-assisted nanoscale plate-shaped Fe3O4
  • Controllable preparation method for high-power ultrasound-assisted nanoscale plate-shaped Fe3O4

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) FeCl 2 and NaOH were dissolved in distilled water respectively to form FeCl with a concentration of 0.50mol / L after dissolution 2 Solution and concentration are the NaOH solution of 15.60mol / L;

[0032] 2) The FeCl configured in step 1) 2 The solution is slowly dropped into the NaOH solution prepared in step 1), FeCl 2 The volume ratio of solution to NaOH solution is 2:5, and the titration rate is controlled at 0.5mL / min. During the dropping process, the NaOH solution was magnetically stirred, and the speed of the magnetic stirrer was controlled at 1200r / min to fully dissolve it;

[0033] 3) The mixed solution obtained in step 2) is assisted by high-power ultrasonic treatment, the ultrasonic power is 160W, the ultrasonic frequency is 32KHz, and the ultrasonic time is 30min, until the mixed solution is light green;

[0034] 4) Transfer the solution obtained in step 3) into a Teflon hydrothermal kettle with a filling ratio of 90%, and keep it warm for 9 hours at a ...

Embodiment 2

[0039] 1) FeCl 2 and NaOH are dissolved in distilled water respectively to form FeCl with a concentration of 0.2mol / L after dissolution 2 Solution and concentration are the NaOH solution of 12.60mol / L;

[0040] 2) The FeCl configured in step 1) 2 The solution is slowly dropped into the NaOH solution prepared in step 1), FeCl 2 The volume ratio of solution to NaOH solution is 2:5, and the titration rate is controlled at 1mL / min. During the dropping process, the NaOH solution was magnetically stirred, and the speed of the magnetic stirrer was controlled at 600r / min to fully dissolve it;

[0041] 3) The mixed solution obtained in step 2) is assisted by high-power ultrasonic treatment, the ultrasonic power is 100W, the ultrasonic frequency is 20KHz, and the ultrasonic time is 25min, until the mixed solution is light green;

[0042] 4) Transfer the solution obtained in step 3) into a Teflon hydrothermal kettle with a filling ratio of 80%, and keep it warm for 12 hours at 200°C;...

Embodiment 3

[0047] 1) FeCl 2 and NaOH were dissolved in distilled water respectively to form FeCl with a concentration of 2.00mol / L after dissolution 2 Solution and concentration are the NaOH solution of 15.80mol / L;

[0048] 2) The FeCl configured in step 1) 2 The solution is slowly dropped into the NaOH solution prepared in step 1), FeCl 2 The volume ratio of solution to NaOH solution is 2:5, and the titration rate is controlled at 2.0mL / min. During the dropping process, the NaOH solution was magnetically stirred, and the speed of the magnetic stirrer was controlled at 1000r / min to fully dissolve it;

[0049] 3) The mixed solution obtained in step 2) is assisted by high-power ultrasonic treatment, the ultrasonic power is 150W, the ultrasonic frequency is 30KHz, and the ultrasonic time is 20min, until the mixed solution is light green;

[0050] 4) Transfer the solution obtained in step 3) into a Teflon hydrothermal kettle with a filling ratio of 70%, and keep it warm for 20 hours at a...

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Abstract

A disclosed controllable preparation method for high-power ultrasound-assisted nanoscale plate-shaped Fe3O4 comprises: respectively dissolving FeCl2 and NaOH in distilled water to form a FeCl2 solution and a NaOH solution; slowly dropwise adding the FeCl2 solution into the NaOH solution, during adding performing magnetic stirring on the NaOH solution to have thorough dissolving; processing the mixed solution assisted by high-power ultrasound until the mixed solution is light green in color; transferring the processed solution in a hydrothermal kettle for keeping warm and generating precipitation; obtaining the precipitation, adding water to wash, performing centrifugal processing, and drying the precipitation to obtain nanoscale plate-shaped Fe3O4. The controllable preparation method of the invention is simple in technical operation; by employing the hydrothermal method for synthesis, the sample is high in phase purity, uniform in distribution, obvious in plate-shaped morphology, controllable in nucleation and growth processes because the sample is grown under the hydrothermal condition, and high in particle crystallization degree.

Description

【Technical field】 [0001] The invention belongs to the technical field of preparing nanometer powder by wet chemical method, and in particular relates to a high-power ultrasonic-assisted nanoscale plate Fe 3 o 4 controllable preparation method. 【Background technique】 [0002] Fe 3 o 4 As the most important ferrite material, it has always been the focus of research because of its unique electromagnetic properties. It has a wide range of applications in magnetic recording materials, catalysis, magnetic fluid, medicine and pigments. Nano Fe 3 o 4 It is a soft magnetic ferrite with good magnetic properties. Its magnetic properties are closely related to the preparation method. Selecting appropriate preparation conditions is the key to improving the magnetic properties. [0003] The currently reported Fe 3 o 4 The preparation methods can obtain finer particles, but still cannot obtain satisfactory results in terms of microscopic morphology and controllability of nucleatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08B82Y40/00B82Y30/00
Inventor 于成龙高丹鹏郝欣王斐赵美娜
Owner SHAANXI UNIV OF SCI & TECH
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