A kind of method that solvothermal method prepares nano ferric oxide

A technology of ferroferric oxide and solvothermal method, which is applied in the field of nanomaterials, can solve the problems of expensive surfactants and increased production costs, and achieve good particle size dispersion, waste recycling, and uniform particle distribution.

Inactive Publication Date: 2017-05-03
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, surfactants are usually added to control the particle size of nanoparticles in the process of preparing nano-Fe3O4 by solvothermal method, but the price of surfactants is relatively expensive, which increases the preparation cost.

Method used

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  • A kind of method that solvothermal method prepares nano ferric oxide
  • A kind of method that solvothermal method prepares nano ferric oxide

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Experimental program
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Embodiment 1

[0025] Take 0.008mol of Fe(NO 3 ) 3 9H 2 O and 0.04mol of NaAc·3H 2 O, respectively dissolved in 35mL of ethylene glycol, after mixing, add 0.2g sodium lignosulfonate, stir to dissolve, then magnetically stir for 20 minutes to make it evenly dispersed; React for 16 hours, cool to room temperature; centrifuge the resulting precipitated mixture, wash the precipitate with deionized water 3 times, then wash 3 times with absolute ethanol, and centrifuge; put the separated solid in a constant temperature drying oven and dry it for 12 hours. The temperature of the above-mentioned constant temperature drying oven is 60° C.; the particle diameter of the obtained nano ferric oxide is about 470 nm.

Embodiment 2

[0027] Take 0.008mol of Fe(NO 3 ) 3 9H 2 O and 0.04mol of NaAc·3H 2 O, respectively dissolved in 35mL of ethylene glycol, after mixing, add 0.4g sodium lignosulfonate, stir to dissolve, and then stir magnetically for 20 minutes to make it evenly dispersed; move the above solution into an autoclave, at 180°C React for 12 hours, cool to room temperature; centrifuge the resulting precipitated mixture, wash the precipitate with deionized water 3 times, then wash 3 times with absolute ethanol, and centrifuge; put the separated solid in a constant temperature drying oven and dry for 12 hours. The temperature of the constant temperature drying oven is 60°C. The XRD pattern of the sample is as follows figure 1 In a, it shows that nano-Fe3O4 particles have been successfully prepared; the scanning electron microscope image is as follows figure 2 a, the particle size of the obtained nano ferric oxide is about 430nm.

Embodiment 3

[0029] Take 0.008mol of Fe(NO 3 ) 3 9H 2 O and 0.04mol of NaAc·3H 2 O, respectively dissolved in 35mL of ethylene glycol, after mixing, add 0.6g sodium lignosulfonate, stir to dissolve, and then magnetically stir for 20 minutes to make it evenly dispersed; move the above solution into an autoclave, and heat it at 180°C React for 16 hours, cool to room temperature; centrifuge the resulting precipitated mixture, wash the precipitate with deionized water 3 times, then wash 3 times with absolute ethanol, and centrifuge; put the separated solid in a constant temperature drying oven and dry it for 12 hours. The temperature of the constant temperature drying oven is 60°C. The XRD pattern of the sample is as follows figure 1 In b, it shows that the nano-Fe3O4 particles were successfully prepared; the scanning electron microscope image is as follows figure 2 b, the particle size of the obtained nano ferric oxide is about 380nm.

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Abstract

The invention provides a solvothermal method for preparing nano-grade ferroferric oxide. According to the invention, lignosulfonate is adopted as a surfactant, and nano-grade ferroferric oxide is prepared with the solvothermal method. The ferroferric oxide has controllable particle size. The applied lignosulfonate is a waste produced from a paper-making process, such that cost is saved, and the environment is protected.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to a method for preparing nanometer iron tetroxide by a solvothermal method. Background technique [0002] In recent years, nano-ferric oxide has become a new type of high-function fine inorganic product facing the 21st century. Ferrite tetroxide is a ferrite with inverse spinel structure, which is one of the most widely used soft magnetic materials. Often used as magnetic fluid materials, recording materials, catalysts, pigments and microwave absorbing materials. At the same time, due to its excellent physical and chemical properties and good biocompatibility, it also has a wide range of applications in the fields of bioscience and medicine, such as: targeted drugs, medical imaging, biological fixation and separation, biosensors and biothermomagnetic therapy . [0003] At present, the traditional preparation of nano-Fe 3 o 4 The methods mainly contain precipitation method, h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08B82Y30/00
Inventor 王晓红周子龙贺强候海前郝臣郭小伟白雪吴方胜
Owner JIANGSU UNIV
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