Chemical preparation method of magnetic graphene

A magnetic graphene and graphene technology, applied in the directions of inorganic material magnetism, ferrous oxide, vanadium halide, etc., can solve problems such as harming the environment, toxicity, uncontrollability, etc., and achieve controllable growth and low process cost. , the effect of simple equipment

Inactive Publication Date: 2012-09-19
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0014] The present invention aims to solve the problems that existing synthesis methods are toxic in the reaction process, endanger the environment, cannot be mass-produced, and the morphology, size and magnetism of magnetic nanoparticles in magnetic graphene are uncontrollable, and magnetic graphene cannot be dispersed in water. Provide a kind of chemical preparation method of magnetic graphene

Method used

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  • Chemical preparation method of magnetic graphene
  • Chemical preparation method of magnetic graphene
  • Chemical preparation method of magnetic graphene

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specific Embodiment approach 1

[0050] Specific embodiment one: the chemical preparation method of magnetic graphene of the present embodiment is carried out according to the following steps:

[0051] 1. Preparation of aminated Fe 3 o 4 Magnetic nanoparticles:

[0052] a. Weigh FeCl 2 4H 2 O, FeCl 3 ·6H 2 O, deionized water and HCl solution, where FeCl 2 4H 2 O and FeCl 3 ·6H 2 The ratio of the amount of O substance is 1: (1.5 ~ 3.0); FeCl 2 4H 2 The ratio of O to deionized water is 1mol: (100-200mL); FeCl 2 4H 2 The ratio of O to HCl solution is 1mol: (10-20L), and the concentration of HCl solution is 1-3mol / L;

[0053] b. FeCl weighed in a 2 4H 2 O and FeCl 3 ·6H 2 O is added to the deionized water weighed in a, then the HCl solution weighed in a is added, and the mixture is evenly stirred to obtain a mixed solution;

[0054] c. Under continuous stirring, feed nitrogen gas into the mixed solution obtained in step b, then add ammonia water to make the pH of the mixed solution 9-12, react a...

specific Embodiment approach 2

[0066] Specific embodiment two: the difference between this embodiment and specific embodiment one is: FeCl in step a 2 4H 2 O and FeCl 3 ·6H 2 The ratio of the amount of O substance is 1: (2 ~ 2.5); FeCl 2 4H 2 The ratio of O to deionized water is 1mol: (120-180mL); FeCl 2 4H 2 The ratio of O to HCl solution is 1mol: (3-10L), and the concentration of HCl solution is 1-2mol / L. Others are the same as in the first embodiment.

[0067] In this embodiment, Fe with different particle sizes can be synthesized by changing the ratio of raw materials and reaction conditions. 3 o 4 Magnetic nanoparticles to achieve Fe 3 o 4 Controlled growth of magnetic nanoparticles.

specific Embodiment approach 3

[0068] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step c, magnetic stirring is used, and the stirring speed is 250-500 r / min. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of magnetic graphene, in particular to a chemical preparation method of magnetic graphene. The preparation method aims at solving the problems of the existing synthesis method that the reaction process is toxic and harmful to the environment, large-scale production cannot be realized, the morphology, size and magnetism of magnetic nanoparticles in the magnetic graphene are not controllable and the magnetic graphene cannot be dispersed in water. The chemical preparation method comprises the steps of: 1) preparing aminated Fe3O4 magnetic nanoparticles; 2) preparing graphene; and 3) preparing magnetic graphene through chemical reaction. The chemical preparation method of the magnetic graphene has the advantages that the high temperature and the high pressure are not required, the equipment is simple, the process cost is low, the environment is protected, no pollution is caused, the grain size of the synthesized magnetic nanoparticles is uniform, the controllable growth of the magnetic nanoparticles can be realized by changing reaction conditions, the solubility of the synthesized magnetic graphene is 0.8-1.2mg/ml, the magnetic graphene can be stably dispersed in water and sediment does not occur within 1-2 months. The graphene prepared by adopting the method can be used in biomedical, energy, electronic fields and the like.

Description

technical field [0001] The invention relates to a preparation method of magnetic graphene. Background technique [0002] Magnetic materials are ancient and widely used functional materials. The research on the preparation and modification of magnetic nanoparticles has always been a hot spot for scientists, and it is widely involved in applications in various fields, especially in biomedicine, biosensors, aerospace, electronic information, etc. field (Behrens. S, Nanoscale, 2011, 3, 877-892). Magnetic nanoparticles smaller than 20nm have supermagnetism at room temperature, and generate magnetic responses under the action of an external magnetic field. According to these characteristics, magnetic separation, magnetic monitoring, nuclear magnetic resonance, and targeted drug delivery and release (Hou.Y.L, Sun. S.H, Adv. Mater, 2010, 22, 2729-2742). Since the 1-100nm magnetic nanoparticles have a large surface activity and magnetic interaction and are easy to agglomerate, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08C01G31/04B82Y30/00B82Y40/00H01F1/11
Inventor 李欣范秀娟
Owner HARBIN INST OF TECH
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