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Preparation method of nano iron oxide-multilayered graphene composite material

A technology of nano-iron oxide and multi-layer graphene, which is applied in the field of materials, can solve the problems of no high activity, etc., and achieve the effect of being convenient for industrial production, conducive to industrial preparation, and simple preparation

Inactive Publication Date: 2016-02-17
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since there are no highly active oxygen-containing functional groups on the surface of multilayer graphene, the preparation of nano-iron oxides on its surface has not been reported yet.

Method used

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  • Preparation method of nano iron oxide-multilayered graphene composite material
  • Preparation method of nano iron oxide-multilayered graphene composite material
  • Preparation method of nano iron oxide-multilayered graphene composite material

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preparation example Construction

[0030] see figure 1 , which is a flow chart of the steps of the preparation method of the nano-iron oxide-multilayer graphene composite material of the embodiment of the present invention, which includes the following steps:

[0031] S10, measure DMF (dimethylformamide) and distilled water with a volume ratio of 8:2, mix them as a mixed solvent, and the volume of the two and the volume of the mixed solvent are used for calculation;

[0032] S20, adding expanded graphite and ultrasonically vibrating for 2 to 7 hours to obtain a mixed solvent of multilayer graphene;

[0033] Wherein the expanded graphite is 1.3mg / mL-2.5mg / mL relative to the mixed solvent, the oxygen content on the surface of the multilayer graphene is less than 3%, and the number of layers is less than 100.

[0034] S30, add ferrous chloride tetrahydrate and anhydrous sodium acetate to the multi-layer graphene mixed solvent, stir for 3 to 6 minutes, pour the solution into a hydrothermal reaction kettle, and kee...

Embodiment 1

[0038] Mix 8ml of DMF and 2ml of distilled water as a mixed solvent, add 15mg of expanded graphite, and ultrasonically vibrate for 2 hours to obtain the multilayer graphene required by the present invention. Add 100mgFecl to the mixed solution 2 4H 2 O was stirred for 5 minutes; the solution was poured into the hydrothermal reactor, so that the filling degree of the solution in the hydrothermal reactor was 30%. Insulate at 120°C for 2 hours and then cool to room temperature; take out the reactants and wash them with alcohol and water for 3 times, and finally dry at 60°C in a drying oven for 24 hours to obtain Fe 2 o 3 - Multilayer graphene composites. see figure 2 and Figure 5 , which are Fe 2 o 3 - The XRD pattern of the multilayer graphene composite material and its scanning electron microscope image, it can be seen from the figure that the reaction obtained is Fe 2 o 3 Particles, whose size is about 100nm. The size uniformity is poor, the distribution is relativ...

Embodiment 2

[0040] Mix 8ml of DMF and 2ml of distilled water as a mixed solvent, add 15mg of expanded graphite, and ultrasonically vibrate for 2 hours to obtain the multilayer graphene required by the present invention. Add 100mgFecl to the mixed solution 2 4H 2 O and 200 mg of anhydrous sodium acetate were stirred for 5 minutes; the solution was poured into the hydrothermal reaction kettle, so that the filling degree of the solution in the hydrothermal reaction kettle was 30%. Keep warm at 120°C for 2 hours and then cool to room temperature; take out the reactants and wash them with alcohol and water for 3 times, and finally dry them in a drying oven at 60°C for 24 hours to obtain nano-Fe 2 o 3 +Fe 3 o 4 - Multilayer graphene composites. see image 3 , which is the nano-Fe of this example 2 o 3 +Fe 3 o 4 - XRD patterns of multilayer graphene composites, see Figure 6 Among A and B, it is respectively the nanometer Fe of the present embodiment 2 o 3 +Fe 3 o 4 - Low- and hig...

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Abstract

The embodiment of the invention discloses a preparation method of a nano iron oxide-multilayered graphene composite material. The preparation method comprises the following steps: measuring DMF (Dimethyl Formamide) and distilled water at the volume ratio of 8 to 2, and mixing to obtain a mixed solvent; adding expanded graphite and carrying out ultrasonic vibration for 2 to 7 hours to obtain multilayered graphene; adding ferrous chloride tetrahydrate and anhydrous sodium acetate into a mixed solution and stirring for 3 to 6 minutes; pouring the solution into a hydrothermal reaction kettle; keeping the heat at 100 DEG C to 130 DEG C for 1 to 5 hours and cooling to a room temperature; taking out a reactant, and centrifuging and washing the reactant with alcohol and water for 3 times respectively to obtain the dried nano iron oxide-multilayered graphene composite material. By adopting a method for complexing metal ions through organic molecules, iron nano oxide particles are prepared on the surface of the multilayered graphene without an oxygen functional group; the technical process is simple and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a nanometer iron oxide-multilayer graphene composite material. The material has application value in the fields of energy storage material, catalytic reaction and microwave absorption. Background technique [0002] Iron oxide nanoparticles are used in many fields. where Fe 2 o 3 Due to their high specific capacity, abundant resources, low price, and environmental friendliness, they can be used as transition metal oxide anode materials and narrow-bandgap semiconductor photocatalysts. while Fe 3 o 4 Nanoparticles not only have the characteristics of superparamagnetism, small size effect, and high surface activity, but also have the characteristics of high saturation magnetization, high coercive force, good electromagnetic wave absorption performance, high Curie temperature, and good biocompatibility. Magnetic fluid, microwave absorbing ma...

Claims

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Application Information

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IPC IPC(8): B82B3/00B82Y40/00
CPCB82B3/0004B82Y40/00
Inventor 徐军明邱小贞徐桢宋开新武军郑梁郑鹏周继军应智花胡炜薇秦会斌崔佳冬
Owner HANGZHOU DIANZI UNIV
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