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Porous graphene and preparation method in magnetic field environment

A porous graphene, graphene technology, applied in graphene, chemical instruments and methods, control/adjustment processes, etc., can solve the problems of small pore size range of porous graphene, uncontrollable preparation process, many defects in finished products, etc. The effect of large distribution range, suitable for large-scale industrial production and high preparation efficiency

Inactive Publication Date: 2020-06-26
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the existing technology is complex and the preparation process is basically uncontrollable, the aperture range of the obtained porous graphene is very small, and the finished product has many defects, the invention provides a preparation method of porous graphene and a magnetic field environment

Method used

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  • Porous graphene and preparation method in magnetic field environment
  • Porous graphene and preparation method in magnetic field environment
  • Porous graphene and preparation method in magnetic field environment

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1: the preparation of porous graphene

[0034] 1) Take 10 mg of ferrocene and add it to 100 mL of ethanol, stir and dissolve to obtain a 0.1 mg / mL solution, continue to stir, take 10 mg / mL graphene oxide aqueous solution and add it to the above solution, ultrasonically disperse for 60 min at 100 W power, then transfer to In the reaction kettle, the height of the permanent magnet preset in the reaction kettle is equal to the liquid level of the solution added, and the volume of the permanent magnet accounts for 5% of the total volume. The temperature is raised to 90°C and kept at a constant temperature for 24h;

[0035] 2) Suction filter the reaction product in step 1, wash with ethanol until it is colorless, freeze-dry, place the freeze-dried product in a carbonization furnace, and heat-treat at 700° C. for 6 hours;

[0036] 3) Wash the product of step 2 in a dilute acid solution, stir for 24 hours, filter with suction, wash with water until neutral, and dry ...

Embodiment 2

[0037] Embodiment 2: the preparation of porous graphene

[0038] 1) Take 300 mg of nickelocene and add it to 100 mL of ethanol, stir and dissolve to obtain a 3 mg / mL solution, continue to stir, take 2.99 mg / mL graphene oxide aqueous solution into the above solution, ultrasonically disperse at 300 W for 32.5 min, transfer Into the reaction kettle, the height of the permanent magnet preset in the reaction kettle is equal to the liquid level of the solution added, the volume of the permanent magnet accounts for 20% of the total volume, the temperature is raised to 135°C, and the temperature is kept constant for 13h;

[0039] 2) Suction filter the reaction product in step 1, wash with ethanol until it is colorless, freeze-dry, place the freeze-dried product in a carbonization furnace, and heat-treat at 950°C for 3.25h;

[0040] 3) Wash the product of step 2 in a dilute acid solution, stir for 12.5 h, filter with suction, wash with water until neutral, and dry (90° C., 14 h) to obt...

Embodiment 3

[0041] Embodiment 3: the preparation of porous graphene

[0042] 1) Add 500mg of cobalt dicene into 100mL ethanol, stir and dissolve to obtain a 5mg / mL solution, continue to stir, take 2.5mg / mL graphene oxide aqueous solution and add it to the above solution, ultrasonically disperse for 5min at 500W power, then transfer to In the reaction kettle, the height of the permanent magnet preset in the reaction kettle is equal to the liquid level of the solution added, and the volume of the permanent magnet accounts for 50% of the total volume. The temperature is raised to 180°C and kept at a constant temperature for 2 hours;

[0043] 2) Suction filter the reaction product in step 1, wash with ethanol until it is colorless, freeze-dry, place the freeze-dried product in a carbonization furnace, and heat-treat at 1200°C for 0.5h;

[0044] 3) Wash the product of step 2 in a dilute acid solution, stir for 1 h, filter with suction, wash with water until neutral, and dry (120° C., 4 h) to obt...

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Abstract

The invention belongs to the technical field of graphene preparation, and particularly relates to porous graphene and a preparation method in a magnetic field environment. By taking ferrocene or nickelocene or cobaltocene as a catalyst precursor, and through low temperature hydrothermal treatment, ferrocene or nickelocene or cobaltocene is combined with an oxygen-containing functional group of graphene oxide and anchored in a magnetic field provided by a permanent magnet, the ferrocene is reduced into iron nanoparticles through carbonization heat treatment, the iron nanoparticles can etch carbon atoms in graphene so that holes are reserved in a graphene sheet layer, and porous graphene is formed after acid pickling. The prepared porous graphene is uniform in pore diameter, can be adjustedwithin the range of several nanometers to hundreds of nanometers according to needs, and is large in pore diameter distribution range. The method is simple in process, high in preparation efficiency,low in cost and suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of graphene preparation, and in particular relates to a preparation method of porous graphene and a magnetic field environment. Background technique [0002] Graphene was discovered in 2004 and immediately received widespread attention from the scientific community as soon as it was announced. Graphene is a single layer of carbon atoms tightly packed into a two-dimensional hexagonal honeycomb lattice structure, and is the thinnest material known so far. The special hexagonal honeycomb structure of graphene contains rich and novel physical phenomena, and it not only has excellent electrical properties (electron mobility at room temperature can reach 2×10 5 cm 2 ·V -1 ·s -1 ), outstanding thermal conductivity (5000W·m -1 ·K -1 ), super high specific surface area (2630m 2 g -1 ), while its Young's modulus (1100GPa) and breaking strength (125GPa) are also comparable to those of nanotubes. In addition, i...

Claims

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Application Information

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IPC IPC(8): C01B32/184B01J19/08
CPCB01J19/0006B01J19/087C01B2204/20C01B2204/22C01B32/184
Inventor 马灿良王艺华赵云
Owner SHANXI UNIV
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