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Method for doping synthesized sulfur with graphene

A technology of sulfur-doped graphene and graphene gel, which is applied in the field of synthesizing sulfur-doped graphene, can solve the problems of high cost, low yield, complicated preparation process of sulfur-doped graphene, etc., and achieves large processing capacity and high cost. Inexpensive and easy to scale up effects

Inactive Publication Date: 2016-03-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the preparation process of sulfur-doped graphene is complicated, the cost is high, and the yield is low in the prior art, and a new method for synthesizing sulfur-doped graphene is provided

Method used

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  • Method for doping synthesized sulfur with graphene
  • Method for doping synthesized sulfur with graphene
  • Method for doping synthesized sulfur with graphene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 300 mg of graphite oxide was ultrasonically stripped in 100 ml of deionized water for 1.5 hours to prepare a 3 mg / ml graphene oxide solution, which was freeze-dried at -40°C for 24 hours to obtain a porous graphene oxide gel, and the volume percentage of hydrogen sulfide was introduced A mixed gas of 20% hydrogen sulfide and nitrogen was reacted at 900° C. for 30 minutes and cooled to room temperature to obtain sulfur-doped graphene, wherein the atomic percentage of sulfur was 1.65%.

[0029] The obtained sulfur-doped graphene X-ray diffraction spectrum (XRD) figure, scanning electron microscope (SEM) figure, transmission electron microscope (TEM) figure, and X-ray photoelectron spectrum (XPS) figure see accompanying drawing, show that sulfur atom Already replaced carbon atoms into the graphene lattice.

Embodiment 2

[0031] 50 mg of graphite oxide was ultrasonically stripped in 100 ml of deionized water for 1 hour to prepare a 0.5 mg / ml graphene oxide solution, which was freeze-dried at -40°C for 48 hours to obtain a porous graphene oxide gel, and the volume percentage of hydrogen sulfide was introduced A mixed gas of 5% hydrogen sulfide and nitrogen was reacted at 550° C. for 2 hours and cooled to room temperature to obtain sulfur-doped graphene, wherein the atomic percentage of sulfur was 2.37%.

[0032] The obtained sulfur-doped graphene X-ray diffraction spectrum (XRD) figure, scanning electron microscope (SEM) figure, transmission electron microscope (TEM) figure, and X-ray photoelectron spectrum (XPS) figure are similar to [embodiment 1] .

Embodiment 3

[0034] 500 mg of graphite oxide was ultrasonically stripped in 100 ml of deionized water for 2 hours to prepare a 5 mg / ml graphene oxide solution, which was freeze-dried at -20°C for 12 hours to obtain a porous graphene oxide gel, and the volume percentage of hydrogen sulfide was introduced A mixed gas of 30% hydrogen sulfide and nitrogen was reacted at 900° C. for 1 hour and cooled to room temperature to obtain sulfur-doped graphene, wherein the atomic percentage of sulfur was 1.53%.

[0035] The obtained sulfur-doped graphene X-ray diffraction spectrum (XRD) figure, scanning electron microscope (SEM) figure, transmission electron microscope (TEM) figure, and X-ray photoelectron spectrum (XPS) figure are similar to [embodiment 1] .

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Abstract

The invention relates to a method for doping synthesized sulfur with graphene. The problems that in the prior art, a sulfur-doped graphene preparation process is complex, high in cost and low in yield are mainly solved. Through the technical scheme of the method including the following steps of a, conducting ultrasonic stripping on graphite oxide in water to obtain a graphene oxide solution; b, freezing and drying the graphene oxide solution to obtain porous graphene oxide gel; c, making porous graphene oxide gel react with mixed gas of hydrogen sulfide and inert gas to obtain sulfur-doped graphene, the problems are well solved, and the method can be used for industrial production of sulfur-doped graphene.

Description

technical field [0001] The invention relates to a method for synthesizing sulfur-doped graphene. Background technique [0002] Graphene is made of carbon atoms with sp 2 The two-dimensional crystal material with a hexagonal network structure composed of hybrid orbitals has excellent properties, such as high electron mobility, good thermal conductivity, light transmission and good stability, and can be applied to semiconductor materials, compound Materials, battery electrode materials, hydrogen storage materials, field emission materials and ultra-sensitive sensors and other fields. Doping is an effective way to change the electronic structure and chemical properties of graphene. The incorporation of heteroatoms into the graphene lattice can not only effectively introduce a band gap, but also increase the defects and local reactivity of graphene, thereby generating many new functions. Studies have found that nitrogen, boron or phosphorus elements can be incorporated into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 王灿贾银娟石竹刘志成高焕新
Owner CHINA PETROLEUM & CHEM CORP
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