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Pd monatomic doped graphene/nitrogen doped amorphous carbon composite material and preparation method thereof

A technology of amorphous carbon and composite materials, applied in the field of nanomaterials, can solve problems such as difficulty in meeting large-scale, controllable, high-efficiency graphene manufacturing needs, serious environmental pollution, and complex processes, and achieve high-value utilization and source Broad, Inexpensive Effects

Inactive Publication Date: 2020-03-27
ZHUHAI FUDAN INNOVATION INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional graphene preparation method is complex in process, high in cost, and serious in environmental pollution. It is difficult to meet the large-scale, controllable, and high-efficiency graphene manufacturing needs. It is urgent to develop new principles and methods for low-cost and environmentally friendly graphene preparation.

Method used

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  • Pd monatomic doped graphene/nitrogen doped amorphous carbon composite material and preparation method thereof
  • Pd monatomic doped graphene/nitrogen doped amorphous carbon composite material and preparation method thereof
  • Pd monatomic doped graphene/nitrogen doped amorphous carbon composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] The preparation method of Pd single atom doped graphene / nitrogen doped amorphous carbon composite material includes the following steps:

[0038] Step 1: Pre-treat the bacterial cellulose: freeze-dry the bacterial cellulose;

[0039] Step 2: Prepare 1-5 mol / L FeCl 3 Aqueous solution: FeCl 3 Add to deionized water and stir evenly;

[0040] Step 3: Immerse the bacterial cellulose obtained in Step 1 in the solution obtained in Step 2 until the swelling is close to the initial shape and is dry;

[0041] Step 4: Heat treatment, keeping the nitrogen gas flow at 100-500sccm under the condition that the atmosphere in the tube furnace is exhausted, and the calcination conditions are first at 200-500℃, the heating rate is 1-10℃ / min, and the temperature is 1- 4h; then keep the heating rate of 1-10℃ / min to 700-1000℃ and keep it for 2h;

[0042] Step 5: Acidification, suction filtration, water washing and drying of the product obtained in Step 4;

[0043] Step 6: Place the precursor obtained ...

Embodiment 2

[0049] The preparation method of Pd single atom doped graphene / nitrogen doped amorphous carbon composite material includes the following steps:

[0050] Step 1: Pre-treat the bacterial cellulose: freeze-dry the bacterial cellulose;

[0051] Step 2: Prepare 1-5 mol / L FeCl 3 Aqueous solution: FeCl 3 Add to deionized water and stir evenly;

[0052] Step 3: Immerse the bacterial cellulose obtained in Step 1 in the solution obtained in Step 2 until the swelling is close to the initial shape and is dry;

[0053] Step 4: Heat treatment, keeping the nitrogen gas flow at 100-500sccm under the condition that the atmosphere in the tube furnace is exhausted, and the calcination conditions are first at 200-500℃, the heating rate is 1-10℃ / min, and the temperature is 1- 4h; then keep the heating rate of 1-10℃ / min to 700-1000℃ and keep it for 2h;

[0054] Step 5: Acidification, suction filtration, water washing and drying of the product obtained in Step 4;

[0055] Step 6: Place the precursor obtained ...

Embodiment 3

[0061] The preparation method of Pd single atom doped graphene / nitrogen doped amorphous carbon composite material includes the following steps:

[0062] Step 1: Pre-treat the bacterial cellulose: freeze-dry the bacterial cellulose;

[0063] Step 2: Prepare 1-5 mol / L FeCl 3 Aqueous solution: FeCl 3 Add to deionized water and stir evenly;

[0064] Step 3: Immerse the bacterial cellulose obtained in Step 1 in the solution obtained in Step 2 until the swelling is close to the initial shape and is dry;

[0065] Step 4: Heat treatment, keeping the nitrogen gas flow at 100-500sccm under the condition that the atmosphere in the tube furnace is exhausted, and the calcination conditions are first at 200-500℃, the heating rate is 1-10℃ / min, and the temperature is 1- 4h; then keep the heating rate of 1-10℃ / min to 500-700℃, keep it for 2h;

[0066] Step five: acidify, filter with suction, wash with water, and dry the product obtained in step four;

[0067] Step 6: Place the precursor obtained in Ste...

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Abstract

The invention belongs to the technical field of nano materials, and particularly relates to a Pd monatomic doped graphene / nitrogen doped amorphous carbon composite material and a preparation method thereof. The iron monatomic doped graphene material is prepared by taking bacterial cellulose as a raw material, and the preparation method comprises the following steps: soaking freeze-dried bacterialcellulose in a catalyst solution, taking out the cellulose and freeze-drying; calcining and acidifying under inert gas; coating dopamine, freeze-drying and calcining; and loading palladium metal simple substance. Compared with the traditional graphene preparation method, the preparation method has the advantages of safe process, simple operation, greatly reduced production cost, almost no pollution to the environment, realization of low-cost rapid preparation of the large-area biomass graphene single crystal and convenience in application in large-scale device preparation; besides, two carbonmaterials with different crystallinity are formed by calcining the carbon-containing compound after coating the carbon-containing compound and the loaded metal simple substance is a single atom so that the addition amount of noble metal is greatly reduced and the material performance is remarkably improved.

Description

Technical field [0001] The invention belongs to the technical field of nanomaterials, and specifically relates to a Pd monoatom-doped graphene / nitrogen-doped amorphous carbon composite material and a preparation method thereof. Background technique [0002] Graphene (GO) is composed of carbon atoms with sp 2 A two-dimensional conjugated nanomaterial with a monoatomic thickness (theoretical thickness of GO is 0.35 nm, and the measured value is about 0.8 nm), which is formed by hybridization of bonds and arranged periodically through hexagons. In the plane direction, the carbon atoms in GO are connected by σ bonds; in the vertical direction, the p orbitals arranged in parallel overlap each other to form delocalized π bonds. The unique structure of GO gives it a series of excellent physical and chemical properties-excellent mechanical, electrical, optical and thermal properties. It is used in electronic information, field effect transistors, thermal and heat dissipation materials, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/194C01B32/05
CPCC01B32/05C01B32/184C01B32/194
Inventor 王帅徐睿殷杰池凯
Owner ZHUHAI FUDAN INNOVATION INST