Preparation method of nitrogen-doped graphene

A nitrogen-doped graphene and precursor technology, applied in the field of nitrogen-doped graphene preparation, can solve problems such as environmental pollution, polluting products, and difficulty in mass production of nitrogen-doped graphene, and achieve excellent performance and appearance. uniform effect

Active Publication Date: 2014-12-24
QINGDAO HAIYUAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the CVD method needs to use a metal catalyst, which will pollute the product, and it is not easy to mass-produ

Method used

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  • Preparation method of nitrogen-doped graphene
  • Preparation method of nitrogen-doped graphene
  • Preparation method of nitrogen-doped graphene

Examples

Experimental program
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Example Embodiment

[0018] Example 1

[0019] The first step, the specific steps of preparing the precursor are as follows: the precursor is prepared in the following way: take 1.1g of citric acid and 28.9g of melamine (molar ratio is 1:40), add it to 150ml of anhydrous methanol, and at room temperature with Stir at a rate of 1000 r / min for 10 min, put the sample into a probe-type ultrasonic processor, and sonicate for 10 min in an ice-water bath at a power of 20 kHz and 400 W. The ultrasonicated sample was taken out, heated in a water bath at 80°C and stirred at a rate of 1000 r / min until the sample had no obvious liquid water, moved into a blast drying oven, and dried at 80°C for 24 hours to obtain the desired precursor.

[0020] In the second step, the precursor calcination process is as follows: put the precursor sample obtained above into a boat-shaped crucible of 100 × 50 × 50 cm, cover it, and place it in a tube furnace under an inert gas atmosphere at a temperature of 6 °C / min. The heati...

Example Embodiment

[0023] Example 2

[0024] The first step, the specific steps of preparing the precursor are as follows: the precursor is prepared in the following way: take 1.2g of citric acid and 23.8g of melamine (molar ratio is 1:30), add it to 130ml of anhydrous methanol, and at room temperature with Stir at a rate of 800 r / min for 20 min, put the sample into a probe-type ultrasonic processor, sonicate for 15 min in an ice-water bath at a power of 20 kHz and 300 W. The sonicated sample was taken out, heated in a water bath at 70 °C and stirred at a rate of 800 r / min until the sample had no obvious liquid water, moved into a blast drying oven, and dried at 70 °C for 36 hours to obtain the desired precursor.

[0025] In the second step, the calcination process of the precursor is as follows: put the obtained precursor sample into a 100×50×50cm boat-shaped crucible, cover it, and place it in a tube furnace under an inert gas atmosphere at a temperature of 4°C / min. The heating rate was incre...

Example Embodiment

[0028] Example 3

[0029] The first step, the specific steps of preparing the precursor are as follows: the precursor is prepared in the following manner: take 1.4g of citric acid and 18.6g of melamine (molar ratio of 1:20), add it to 100ml of anhydrous methanol, and at room temperature with Stir at a rate of 600 r / min for 30 min, put the sample into a probe-type ultrasonic processor, and sonicate for 20 min in an ice-water bath at a power of 20 kHz and 200 W. The ultrasonicated sample was taken out, heated in a water bath at 60 °C and stirred at a rate of 600 r / min until the sample had no obvious liquid water, moved into a blast drying oven, and dried at 60 °C for 48 hours to obtain the desired precursor.

[0030] In the second step, the precursor calcination process is as follows: put the obtained precursor sample into a 100 × 50 × 50 cm boat-shaped crucible, cover it, and place it in a tube furnace under an inert gas atmosphere at a temperature of 2 °C / min. The heating rat...

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Abstract

The invention relates to a preparation method of nitrogen-doped graphene. The preparation method comprises the following steps: adding raw materials of citric acid and melamine into methanol, stirring, performing ultrasonic treatment and drying to obtain a precursor, and calcining the precursor in a tubular furnace by two stages to finally obtain the nitrogen-doped grapheme. Compared with the prior art, the preparation method has the following advantages: the raw materials are wide in source; the steps are simple; requirements on equipment are low; in the preparation process, a reducing agent is not required, so that environment pollution is low; the prepared nitrogen-doped graphene is thin in sheet, large in specific surface area, uniform in structure and good in reproducibility.

Description

technical field [0001] The invention relates to the field of preparation of nano-carbon materials, in particular to a preparation method of nitrogen-doped graphene. Background technique [0002] Graphene is a carbon atom with sp 2 Carbon materials with a single-layer two-dimensional atomic structure composed of hybrid-connected monoatomic layers have been receiving scientific attention in recent years because of their extraordinary physical and electrochemical properties, such as high specific surface area, high electrical conductivity, and high mechanical strength. widespread attention in the world. Theoretical studies have shown that nitrogen doping can change the electronic structure and chemical properties of graphene, making it have n-type semiconductor properties, thereby expanding its applications in the fields of optics, electricity, and magnetism. [0003] At present, the commonly used methods for preparing nitrogen-doped graphene mainly include chemical vapor dep...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 朱申敏廖永亮张荻孙治华朱呈岭娄湘虹
Owner QINGDAO HAIYUAN IND
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