Graphene and ferroferric oxide @gold composite, and preparation method and application of graphene and ferroferric oxide @gold composite

A technology of ferric tetroxide and composite materials, applied in the field of materials, can solve problems such as unstable connection system, and achieve the effects of simple and reliable preparation method, high efficiency and mild reaction conditions

Active Publication Date: 2017-09-05
GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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Problems solved by technology

CN106501235A discloses a Vibrio parahaemolyticus detection method based on graphene oxide/ferric oxide/colloidal gold nanopartic

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  • Graphene and ferroferric oxide @gold composite, and preparation method and application of graphene and ferroferric oxide @gold composite
  • Graphene and ferroferric oxide @gold composite, and preparation method and application of graphene and ferroferric oxide @gold composite
  • Graphene and ferroferric oxide @gold composite, and preparation method and application of graphene and ferroferric oxide @gold composite

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[0033] Example 1

[0034] This embodiment provides a method for preparing graphene and ferroferric oxide@gold composite material, which includes the following steps:

[0035] (1) Construction of azide mercaptan-modified ferroferric oxide@gold complex and alkynylated graphene oxide:

[0036] Among them, the ferroferric oxide@gold complex modified with thiol azide includes the following construction steps:

[0037] A. Preparation of colloidal solution of nanometer ferroferric oxide by co-precipitation method

[0038] 2.703g FeCl 3 ·6H 2 Put O in a four-necked reaction flask system, add 100mL of three-distilled water to dissolve it, pass nitrogen protection, add 0.998g of FeCl under stirring conditions 2 ·4H 2 O, add ammonia water dropwise from the injection port to the reaction system to increase the pH of the solution to 9.2, stop adding ammonia water, continue the reaction for 15 minutes, and then heat the reaction system to 85°C for 25 minutes to obtain nano ferroferric oxide The coll...

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Abstract

The invention relates to a graphene and ferroferric oxide @gold composite, and a preparation method and an application of the graphene and ferroferric oxide @gold composite. The preparation method of the graphene and ferroferric oxide @gold composite comprises the following steps: a ferroferric oxide @gold complex modified by azide mercaptan is constructed, oxidized graphene is activated by thionyl chloride and then reacts with propargyl alcohol to produce alkynylation oxidized graphene, and then the ferroferric oxide @gold complex and the alkynylation oxidized graphene are catalyzed in a nitrogen atmosphere and alkynyl groups and and azide groups undergo click reaction, thereby obtaining the graphene and ferroferric oxide @gold composite. Reaction conditions of the preparation method of the graphene and ferroferric oxide @gold composite are mild and the preparation method is simple and reliable. The graphene and ferroferric oxide @gold composite allows a system to be stable through covalent bond connection, has the characteristics of magnetism, good microwave absorption performance, good plasma resonance absorption and attenuation to X-rays, and can be applied to nuclear magnetic imaging, microwave-induced thermoacoustic tomography, photoacoustic tomography and X-ray imaging.

Description

technical field [0001] The invention relates to the field of materials, in particular to a composite material of graphene and ferroferric oxide@gold and its preparation method and application. Background technique [0002] With the rapid development of nanotechnology today, the function of single-component materials has great limitations. For example, graphene has a high dielectric constant and will be polarized by an external magnetic field in an electromagnetic field, while the internal electric dipole of graphene materials Relaxation occurs with the movement of the electric field, and part of the electric energy is consumed to cause the dielectric itself to heat up, that is, dielectric loss occurs. A single graphene sheet is easily penetrated by electromagnetic waves and loses its ability to absorb electromagnetic waves. At the same time, a single high dielectric loss will also lead to difficulties in impedance matching. Ferric iron tetroxide is ferromagnetic and is a go...

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Application Information

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IPC IPC(8): B22F9/24B22F1/02B22F1/10B22F1/103B22F1/17
CPCB22F9/24B22F1/17B22F1/103B22F1/10B22F2302/40B22F2301/25B22F2302/25
Inventor 黄国家李茂东杨波辛明亮尹宗杰张双红李仕平翟伟王志刚黎佩珊
Owner GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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