Method for preparing Fe3O4 nanorods in gradient magnetic field

A gradient magnetic field, nanorod technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of reducing the reaction rate and increasing the reaction time, so as to improve the reaction efficiency and reduce the impurity particles. , uniform length and diameter
CN102887547BInactive Publication Date: 2014-07-30NORTHWEST NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHWEST NORMAL UNIVERSITY
Publication Date
2014-07-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for preparing Fe3O4 nanorods in a gradient magnetic field, which comprises the following steps: under the action of a gradient magnetic field, dropwisely adding a solution containing iron ions and ferrous ions into a reactor charged with ammonia gas, and reacting at 80-90 DEG C for 40-50 minutes; separating a black precipitate from the solution; and cooling to room temperature, respectively washing with distilled water and ethanol, and carrying out vacuum drying to obtain the Fe3O4 nanorods. The scanning electron microscope, transmission electron microscope, X-ray diffraction and other analyses indicate that the prepared Fe3O4 nanorods have the advantages of regular and orderly structure, complete crystals and uniform morphology, the diameters are 35-45nm, and the lengths are 300-400nm; the analysis on the magnetic properties of the product at room temperature detects that the magnetic remanence and coercive force of the product can be neglected, the saturation magnetization is 54-86 emu / g, and thus, the product appears superparamagnetism; and the magnetic response analysis illustrates that the Fe3O4 nanorods also have high magnetic response, and such characteristic has great potential application prospects in the fields of drug delivery systems and catalysis.
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Description

technical field

[0001] The invention belongs to the technical field of nanomaterials, and relates to a ferric oxide (Fe 3 o 4 ) preparation method of magnetic nanorods, especially related to the preparation of Fe under a gradient magnetic field 3 o 4 nanorod approach. Background technique

[0002] In recent years, Fe 3 o 4 Because of its unique magnetic properties and environmental stability, it has attracted much attention from researchers. Because the magnetic domain structure directly affects the performance and application range of magnetic materials, the controlled synthesis of the structure and morphology of magnetic nanomaterials has become the core of the preparation of magnetic materials. Many researchers have attempted to use different methods to modify the morphology of magnetic nanoparticles, among which the one-dimensional nanostructures mainly include nanowires and nanorods. However, in many synthetic methods, most of them are based on solid-state templa...

Claims

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