Preparation method of magnetic nano gamma-Fe2O3

Abstract

The invention provides a preparation method of magnetic nano gamma-Fe2O3. The preparation method comprises steps as follows: a FeCl3.6H2O and anhydrous sodium acetate mixture is added to an ethanol solution, and a solution A is obtained; ascorbic acid is added to the solution A, a precursor solution B is obtained, the precursor solution B is transferred to a homogeneous reaction instrument provided with a polytetrafluoroethylene lining and reacts for 16-24 h at the temperature of 160-200 DEG C, and a product is centrifugally washed with deionized water and anhydrous ethanol respectively and dried; a sample obtained after drying is poured into a mortar and ground into fine sample powder, and magnetic nano gamma-Fe2O3 is obtained. The solvothermal method has the characteristics that the process is simple, preparation period is short and the reaction condition is easy to control, reaction progress, morphology size and physical phase composition can be controlled by different temperatures,and different physical phase composition and special morphologic structures can be obtained at the proper temperatures. The defects that the reaction of a traditional method is difficult to perform and control and the traditional method is high in energy consumption, low in yield, complicated in process and the like are overcome.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a preparation method of magnetic nanometer gamma-ferric oxide. Background technique [0002] Nowadays, with the advancement of science and technology, people's demand for new materials is increasing. Research on new magnetic materials is attracting attention, and these researches involve industries such as materials and electronics. These magnetic materials have been applied in providing magnetic fields, energy conversion, sensors, etc. γ-Fe2O3 material is a magnetic material. Because of its special properties, magnetic γ-Fe2O3 is widely used in chemical industry, medicine, catalyst and other fields, especially in medical applications. As a material for directional heat collection to treat tumors. Furthermore, when the grain size of the prepared gamma-ferric oxide material reaches the nanometer level, the nanoparticles will produce small size effects, surface ef...

AI Technical Summary

Problems solved by technology

Among them, the solid-phase method has fast reaction speed, simple process and excellent product quality, but requires high temperature and high energy consumption.

And make the product easy to sinter or melt

The sol-gel method can uniformly mix the reactants, because the components of the reaction are at the micron level, so the reaction is easy to carry out, and the reaction temperature is low, but the raw materials currently used are expensive, and secondly, the sol-gel takes a long time. At the same time, harmful organic substances such as gas will overflow during the drying process

The microemulsion method can prepare monodisperse nanomaterials, the particle size of the prepared materials is controllable, the distribution is narrow, and the surfactant can improve the interfacial properties of the nanomaterials, etc., but the surfactant is expensive and not efficient, which is harmful to humans and The environment has certain hazards

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