Method for preparing porous nanometer graphite

A technology of nano-graphite and iron salt, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of difficult operation, expensive raw materials, high production cost, etc., to reduce energy consumption and production cost , Lower conversion temperature, lower equipment requirements

Active Publication Date: 2015-04-08
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation of nano-graphite by the above method requires high equipment, is not easy to operate, and the raw materials are relatively expensive, resulting in high production costs, and is not suitable for large-scale industrial production.

Method used

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  • Method for preparing porous nanometer graphite
  • Method for preparing porous nanometer graphite

Examples

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Embodiment 1

[0020] Weigh 0.025 moles of ferric nitrate, 0.075 moles of glycine, and 0.075 moles of carbon source, dissolve various raw materials in distilled water to prepare a solution, and place the solution on a temperature-controllable electric furnace for heating. The solution reacts after volatilization and concentration to obtain a precursor powder. The precursor powder is reacted at 700°C under a nitrogen atmosphere for 4 hours, and then the powder is washed with hydrochloric acid and ethanol and dried to obtain porous nano-graphite.

Embodiment 2

[0022] Weigh 0.025 moles of ferric nitrate, 0.025 moles of urea, and 0.05 moles of carbon source, dissolve various raw materials in distilled water to prepare a solution, and place the solution on a temperature-controllable electric furnace for heating. The solution reacts after volatilization and concentration to obtain a precursor powder. The precursor powder is reacted at 900°C and an argon atmosphere for 3 hours, and then the powder is washed with hydrochloric acid and water and dried to obtain porous nano-graphite .

Embodiment 3

[0024] Weigh 0.025 moles of ferric chloride, 0.075 moles of ammonium nitrate, 0.075 moles of glycine, and 0.1 moles of carbon source, dissolve various raw materials in distilled water to prepare a solution, and place the solution on a temperature-controllable electric furnace for heating. The solution undergoes a reaction after volatilization and concentration to obtain a precursor powder. The precursor powder is reacted at 1000°C in a vacuum atmosphere for 2 hours, and then the powder is washed with nitric acid and ethanol and dried to obtain porous nano-graphite.

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Abstract

The invention discloses a method for preparing porous nanometer graphite and belongs to the field of research on nanometer carbon materials. The method comprises the following main steps: preparing a water-soluble carbon source as a raw material, an auxiliary agent and iron salts according to an appropriate ratio into a solution and heating; evaporating, concentrating and reacting the solution to obtain carbon-containing precursor powder, reacting the precursor for 0.5-5 hours at 600-1300 DEG C under a certain atmosphere to obtain a reaction product, and washing the reaction product with acid to obtain porous nanometer graphite. The method is simple in operation and low in cost and is conductive to industrial production; the obtained product is high in degree of graphitization, has a porous structure and can be widely applied in such fields as lithium ion cells, field emission materials and super capacitors.

Description

technical field [0001] The invention belongs to the field of nano-carbon material research, and in particular relates to a preparation method of porous nano-graphite. Background technique [0002] Due to its excellent chemical stability, corrosion resistance, good mechanical properties and field emission properties, nano-graphite has a wide range of applications in many fields, such as lithium-ion batteries, supercapacitors, nano-sensors, etc. The conversion of traditional carbon materials into graphite requires a relatively high graphitization temperature (2500°C or even 3000°C). In recent years, the preparation and synthesis of nano-graphite are mainly divided into two categories: one is the physical preparation method of crushing natural scales, mainly including mechanical ball milling, detonation cracking, ultrasonic crushing and electrochemical intercalation; the other The first category is chemical synthesis, mainly including pulsed laser deposition, detonation synthe...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y30/00
Inventor 秦明礼曹知勤顾月茹曲选辉吴昊阳贾宝瑞
Owner UNIV OF SCI & TECH BEIJING
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