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Method for preparing graphene/metal oxide-composite by uniform deposition at room temperature

A graphene and oxide technology, applied in the direction of carbon compounds, chemical instruments and methods, non-metallic elements, etc., can solve the problems of graphene product docking and other problems, and achieve easy industrial mass production, increase hydrophilicity, and high quality effect of density

Active Publication Date: 2019-09-27
HEILONGJIANG UNIV
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the existing method uses graphene oxide as the initial reactant and cannot be docked with the upstream industrialized graphene products, and provides a graphene / metal oxide-composite prepared by uniform deposition at room temperature Methods

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  • Method for preparing graphene/metal oxide-composite by uniform deposition at room temperature
  • Method for preparing graphene/metal oxide-composite by uniform deposition at room temperature
  • Method for preparing graphene/metal oxide-composite by uniform deposition at room temperature

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specific Embodiment approach 1

[0038] Specific embodiment one: in this embodiment, the method for preparing graphene / metal oxide-composite by volatilization and uniform deposition at room temperature is carried out according to the following steps:

[0039] 1. Add 24mg of single-layer graphene into 30mL of deionized water, and sonicate for 20min;

[0040] 2. Pour 0.1208-0.2908g of metal nitrate into 100mL of deionized water, stir magnetically until completely dissolved;

[0041] 3. Under the condition of magnetic stirring, add 3-10 mL of ammonia water with a mass concentration of 25% dropwise to the solution in step 2 until the precipitate in the solution is completely dissolved to obtain an aqueous solution of the metal ion-ammonia complex;

[0042] 4. Pour the solution obtained in step 1 into the metal ion-ammonia complex aqueous solution, then add deionized water until the volume of the mixed solution is 200mL, and keep magnetic stirring at room temperature for 12-24h;

[0043] 5. After 12-24h room temp...

specific Embodiment approach 2

[0045] Embodiment 2: This embodiment differs from Embodiment 1 in that the frequency of the ultrasonic treatment in step 1 is 40 kHz. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0046] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the metal nitrate described in step 2 is nickel nitrate, copper nitrate or zinc nitrate. Others are the same as those in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a graphene / metal oxide-composite by room-temperature evaporation and homogeneous deposition, and relates to the method for preparing the graphene / metal oxide-composite. The invention aims to solve the technical problem that a conventional method takes graphene oxide as an initial reactant and cannot be docked with an upstream industrialized graphene product. The method comprises the steps: under a condition of magnetic stirring, adding ammonia water to a solution of metal nitrate drop by drop until a precipitate in the solution is completely dissolved, to obtain a metal ion-ammonia complex aqueous solution; pouring a monolayer graphene aqueous dispersion liquid into the metal ion-ammonia complex aqueous solution, volatilizing NH3 at room temperature for 12-24 h, carrying out centrifugal separation, cleaning for 3-4 times, freeze-drying and sintering, to obtain the graphene / metal oxide-composite. The synthesis method directly uses grapheneproduced by upstream industrialization as the initial reactant, so as to greatly facilitate the upstream and downstream industrialization docking and the quality control of the product performance. The invention belongs to the field of preparation the graphene / metal oxide-composite.

Description

technical field [0001] The invention relates to a method for preparing graphene / metal oxide-composites. Background technique [0002] A large number of literatures show that graphene / metal oxide-composites have been widely used in many fields such as lithium-ion batteries, fuel cells, supercapacitors, photovoltaic devices, electrochemical sensors, gas sensors, photocatalysis, and Raman enhancement in the past decade. There are various synthesis methods for graphene / metal oxide-composites, mainly including hydrothermal synthesis, microwave-assisted synthesis, liquid phase deposition, vapor phase deposition, electrochemical deposition, reflux deposition, and magnetron sputtering method, sol-gel method, etc. Obviously, these synthetic methods require high equipment costs, harsh preparation conditions, cumbersome operations, and are not suitable for large-scale industrial production. In addition, the key problem in the synthesis process is to disperse metal oxides uniformly on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/194C01G3/02C01G9/02C01G53/04
Inventor 霍丽华杨铭徐英明程晓丽高山张现发
Owner HEILONGJIANG UNIV
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