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Graphene/manganese tetraoxide nanocomposite and preparation method thereof

A technology of nano manganese tetraoxide and composite materials, which is applied in chemical instruments and methods, manganese oxide/manganese hydroxide, carbon compounds, etc., can solve problems such as complex synthesis processes, achieve large specific surface area, simple method, and prevent agglomeration Effect

Active Publication Date: 2014-05-07
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the preparation of graphene / manganese tetraoxide nanocomposites, and the synthesis process is generally complicated.

Method used

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  • Graphene/manganese tetraoxide nanocomposite and preparation method thereof
  • Graphene/manganese tetraoxide nanocomposite and preparation method thereof
  • Graphene/manganese tetraoxide nanocomposite and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] Take 1mL of 10mg / mL graphite oxide concentrate and put it in a beaker, add 39mL of deionized water to obtain a graphene oxide solution with a concentration of 0.25mg / mL, stir evenly, ultrasonicate in a water bath at room temperature for 10min, then place the beaker in an ice water bath, And further ultrasonicated for 60min under the power of 240W of the probe ultrasonic processor; add 1mmol potassium permanganate to the above 0.25mg / mL graphene oxide solution, stir until the potassium permanganate is completely dissolved, then add 1000μL to it with a mass fraction of 35% hydrazine hydrate, stirred for 20 minutes to make it evenly mixed; pour the above mixed solution into a 50mL reaction kettle, and react at 100°C for 8 hours. After the reaction is completed, take it out after cooling. The reaction product is brownish yellow, indicating the formation of manganese oxide. The product was repeatedly washed by centrifugation and vacuum-dried at 80°C for 12 hours to obtain a t...

Embodiment 2

[0034] Take 2mL of 10mg / mL graphite oxide concentrate and put it in a beaker, add 38mL of deionized water to dilute the concentration of graphite oxide solution to 0.5mg / mL, stir evenly, and put the beaker in an ice water bath after ultrasonication for 10min at room temperature. Sonicate for 60min under the probe ultrasonic processor at 240W power; add 1mmol potassium permanganate to the above 0.5mg / mL graphene oxide solution, stir until the potassium permanganate is completely dissolved, add 1000μL of hydrazine hydrate with a mass fraction of 35%, and stir 20min to make it evenly mixed; pour the above mixed solution into a 50mL reaction kettle, react at 100°C for 8h, the reaction product is washed repeatedly by centrifugation, and vacuum dried at 80°C for 12h to obtain a graphene / manganese tetraoxide nanocomposite material , and trimanganese tetraoxide particles are evenly attached to the graphene surface, and trimanganese tetraoxide is spherical or square, such as figure 2 ...

Embodiment 3

[0036]Take 1mL of 10mg / mL graphite oxide concentrate and put it in a beaker, add 39mL of deionized water to dilute the concentration of graphite oxide solution to 0.25mg / mL, stir evenly, and put the beaker in an ice water bath after ultrasonication for 10min at room temperature. Ultrasonicate for 60min at a probe ultrasonic processor with a power of 240W; add 1mmol potassium permanganate to the above 0.25mg / mL graphene oxide solution, stir until the potassium permanganate is completely dissolved, add 1000μL of hydrazine hydrate with a mass fraction of 35%, and stir Mix it uniformly for 20 minutes; pour the above mixed solution into a 50mL reaction kettle, react at 80°C for 8h, and the reaction product is washed repeatedly by centrifugation and vacuum dried at 80°C for 12h to obtain a graphene / manganese tetraoxide nanocomposite material , and manganese tetraoxide is spherical, with a diameter of about 20nm, such as image 3 shown.

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Abstract

The invention discloses a graphene / manganese tetraoxide nanocomposite and a preparation method thereof. The method comprises the following steps of firstly, diluting graphite oxide concentrated solution to be 0.1-5mg / mL with deionized water, stirring uniformly, after water bath ultrasonic at room temperature, putting a beaker into ice-water bath, and carrying out ultrasonic treatment by a probe ultrasonic processor to obtain graphene oxide solution; secondly, adding permanganate into the graphene oxide solution, stirring till the permanganate is dissolved completely, adding a reducing agent, and stirring uniformly; thirdly, reacting the solution obtained in step two at 80-120 DEG C, after reacting, cooling, centrifuging and washing, and vacuum-drying, so as to obtain the graphene / manganese tetraoxide nanocomposite. The graphene / manganese tetraoxide nanocomposite is prepared by one-step hydrothermal method, the reducing agent simultaneously reduces the two raw materials, and the method is simple and easy to operate.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic nanometer materials, in particular to a preparation method of a graphene / manganese tetraoxide nanocomposite material. Background technique [0002] Nanomaterials, also known as nanostructured materials, refer to materials with at least one dimension in the nanoscale range (1-100nm) or composed of them as basic units. The size of nanomaterials is in the transition region between atoms and macroscopic materials. Such a system is neither a typical macroscopic system nor a typical microscopic system, but a mesoscopic system, so it has small size effects, surface effects, and quantum size effects. , Macroscopic quantum tunneling effect and other special effects, but also endow it with special physical and chemical properties that are different from single molecules and bulk materials. Because different nanomaterials have different physical and chemical properties, in practical applications, som...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01G45/02B82Y30/00B82Y40/00C01B32/192
Inventor 戴晓军冯娇边莎艾文涛蔡华强
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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