Method for thermally preparing ferroferric oxide nanoparticle by using low-temperature solvent

Abstract

The invention provides a method for thermally preparing a ferroferric oxide nanoparticle by using a low-temperature solvent. The method comprises the following steps: A, preparing 30-40 millimole of NaOH, 5.5-6.5 millimole of triethanolamine and ethylene glycol into an alkali liquid, and then averagely dividing the alkali liquid into two parts; B, preparing 1.5-2.0 millimole of ferric salt into a ferric salt liquid by using an ethylene glycol solvent; C, preparing 1-1.5 millimole of ferrous salt into a ferrous salt liquid by using the ethylene glycol solvent; D, mixing one part of the alkali liquid and the ferric salt; E, mixing the other part of the alkali liquid and the ferrous salt liquid; F, mixing the liquid obtained from the step D and the liquid obtained from the step E, stirring till no precipitation exists to obtain a mixed liquid; G, adding the mixed liquid obtained from the step F to a hydrothermal kettle, heating to 100 DEG C, carrying out thermostatic reaction for 1-20 hours; and H, cooling, carrying out magnetic separation, washing, and drying to obtain a Fe3O4 self-assembly nanoparticle. The method provided by the invention has the advantages of short reaction time, easiness for condition control, higher output, good product magnetism and uniformity in particle size.

Description

technical field [0001] The present invention relates to a method for preparing inorganic non-metallic materials, in particular to a method for preparing iron ferric oxide nanometer microspheres by low-temperature solvothermal. Background technique [0002] In recent years, the research on the preparation method and properties of nano-self-assembled structures has attracted the attention of many scientists. This is not only because nano-self-assembled structures have great significance in theory, but also have a wide range of applications in practice. With the rapid development of nanotechnology, nano-Fe 3 o 4 Because of its special electromagnetic properties, it has broad application prospects in the fields of functional materials, such as magnetic recording materials, magnetic fluid materials, drugs and biosensors, and the research on its preparation methods and properties has attracted much attention. Currently synthesized Fe 3 o 4 The main methods are aqueous chemical...

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Problems solved by technology

Currently synthesized Fe 3 o 4 The main methods are aqueous chemical precipitation method, pyrolysis method, hydrothermal method, solvothermal method, etc. 3 o 4 Future development has played a great role in promoting, but the synthesis of Fe 3 o 4 At present, self-assembled microspheres mainly use a single +3 valent iron source, and are synthesized by solvothermal reduction above 200°C. The synthesis temperature is high, the operation requirements are high, the product involves the reduction process, and the reaction time is long.

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