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Preparation method of nitrogen and sulfur co-doped graphene

A nitrogen-sulfur co-doping, graphene technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as relatively high requirements for equipment corrosion resistance and environmental pollution, and achieve easy control of the reaction process. The effect of low cost and simple process

Active Publication Date: 2013-06-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method they adopted uses nitrogen and sulfur sources as nitrogen and sulfur sources, and involves pungent and corrosive ammonia and sulfur dioxide gases, which are likely to pollute the environment and require relatively high corrosion resistance for equipment.

Method used

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  • Preparation method of nitrogen and sulfur co-doped graphene
  • Preparation method of nitrogen and sulfur co-doped graphene
  • Preparation method of nitrogen and sulfur co-doped graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh graphene, melamine and dibenzyl disulfide according to the mass ratio of 1:6:6, put them into a mortar, mix and grind for 2 hours; After entering high-purity argon to remove air, the temperature was raised to 1000°C at a rate of 3°C / min, kept for 1h, and cooled to room temperature naturally to obtain nitrogen-sulfur co-doped graphene.

[0025] The transmission electron microscope and X-ray diffraction patterns of gained nitrogen-sulfur co-doped graphene are respectively as follows figure 1 with figure 2 As shown, it can be seen that the resulting nitrogen-sulfur co-doped graphene still has very thin wrinkled shape and few layers.

[0026] The Raman spectrum of gained nitrogen-sulfur co-doped graphene is as follows image 3 It can be seen from the figure that the I of graphene D / I G =1.41, the I of nitrogen-sulfur co-doped graphene D / I G =1.21, due to I D / I G Indicates the degree of disorder of graphene, and it can be seen that graphene is more ordered ...

Embodiment 2

[0029] Weigh graphite oxide, urea and p-toluenesulfonic acid according to the mass ratio of 1:20:5, put them into a mortar, mix and grind for 4 hours; After entering high-purity argon to remove air, the temperature was raised to 900°C at a rate of 3°C / min, kept for 5h, and cooled to room temperature naturally to obtain nitrogen-sulfur co-doped graphene.

[0030] It can be obtained by elemental analysis that in the nitrogen-sulfur co-doped graphene, the nitrogen content is 3.2 at.%, and the sulfur content is 2.0 at.%.

Embodiment 3

[0032] Weigh graphene oxide and L-cysteine-S-2-thiophene formaldehyde according to the mass ratio of 1:20, put them into a mortar, mix and grind for 5 hours; then put the mixture into a porcelain boat and place it in a tube furnace After passing high-purity nitrogen into the heating zone to remove the air, the temperature was raised to 700°C at a rate of 3°C / min, kept for 3h, and cooled down to room temperature naturally to obtain nitrogen-sulfur co-doped graphene.

[0033] It can be obtained by elemental analysis that in the nitrogen-sulfur co-doped graphene, the nitrogen content is 5 at.%, and the sulfur content is 1.1 at.%.

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Abstract

The invention discloses a nitrogen and sulfur co-doped graphene. The method comprises the following steps: grinding and uniformly mixing graphene or a graphene derivative, a nitrogen-containing compound and a sulfur-containing compound, carrying out thermal annealing under the protection of an inert gas at a temperature of 500-1000DEG C, maintaining the temperature for 1-5h, and cooling to room temperature to obtain the nitrogen and sulfur co-doped graphene, wherein content of the nitrogen element in the nitrogen and sulfur co-doped graphene is 1-10at.%, and the content of the sulfur element in the nitrogen and sulfur co-doped graphene is 0.5-2at.%. The method has the advantages of simple technology, low cost, easy control of the reaction process and the like, is suitable for the industrial large-scale production, and can be used in the super capacitor field, the sensor field, the catalytic field, the fuel battery field, the lithium air battery field and the like.

Description

technical field [0001] The invention relates to the field of graphene nanomaterials, in particular to a preparation method of nitrogen-sulfur co-doped graphene. Background technique [0002] Graphene is SP 2 A two-dimensional crystal formed by stacking hybridized carbon atoms in a six-membered ring. Since the first preparation of graphene by mechanical exfoliation in 2004 by Prof. Andre K. Geim and his collaborators, graphene has quickly become a current research center in nanoelectronics, condensed matter physics and materials science. hotspots. Graphene with two-dimensional structure has important application value in the fields of electronics, sensors, supercapacitors and batteries due to its unique physical, chemical and mechanical properties. In recent years, experiments and theory have proved that the doping of heteroatoms such as nitrogen, boron, sulfur, phosphorus and halogen elements can adjust and change the electrical properties and chemical stability of graphe...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/194
Inventor 王海辉蔡丹丹王素清
Owner SOUTH CHINA UNIV OF TECH
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