Molybdenum disulfide/sulfur-and-nitrogen-doped graphene nanosheet composite material as well as preparation method and application thereof

A technology of nitrogen-doped graphene and graphene nanosheets, which is applied in the field of nanocomposite materials and its preparation, can solve the problems of small sample yield, poor conductivity, and enlarged electron transmission path, and achieve simple preparation method and large specific surface area , a wide range of effects

Active Publication Date: 2015-03-11
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a semiconductor, molybdenum disulfide has poor electrical conductivity. Combining with graphene can indeed increase the electrical conductivity of the material, which is beneficial to electron transport, but the conductivity of graphene obtained by hydrothermal reaction is not very ideal, and the disulfide obtained by hydrothermal reaction Molybdenum sulfide is not grown on graphene in situ but mixed with it. The contact between sheet molybdenum disulfide and graphene is not close enough, which will increase the electron transmission path. On the other hand, the sample yield obtained by hydrothermal reaction Small, not conducive to large-scale production

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  • Molybdenum disulfide/sulfur-and-nitrogen-doped graphene nanosheet composite material as well as preparation method and application thereof
  • Molybdenum disulfide/sulfur-and-nitrogen-doped graphene nanosheet composite material as well as preparation method and application thereof

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Embodiment 1

[0026] A molybdenum disulfide / sulfur and nitrogen-doped graphene nanosheet composite material of the present invention, in the composite material, molybdenum disulfide is loaded on sulfur, nitrogen-doped graphene nanosheet; the composite material is a diameter of 40 ~ 100nm wafer.

[0027] The preparation method of the molybdenum disulfide / sulfur and nitrogen-doped graphene nanosheet composite material of the present embodiment comprises the following steps: taking by weighing 0.22g ammonium tetrathiomolybdate, 0.15g graphene oxide, and 1.5g thiourea respectively, Dissolve in 150mL DMF and ultrasonically mix evenly, remove most of the solvent by rotary evaporation in an oil bath at 110°C with a rotary evaporator, take out the sample and dry it in vacuum at 120°C in a watch glass, take it out after complete drying, and grind it with a mortar Put it in a quartz boat, put it in a tube furnace, connect argon / hydrogen (10%) and argon with a three-way connection, and then use soapy ...

Embodiment 2

[0031] A molybdenum disulfide / sulfur and nitrogen-doped graphene nanosheet composite material of the present invention, in the composite material, molybdenum disulfide is loaded on sulfur, nitrogen-doped graphene nanosheet; the composite material is a diameter of 40 ~ 100nm wafer.

[0032]The preparation method of the molybdenum disulfide / sulfur and nitrogen-doped graphene nanosheet composite material of the present embodiment comprises the following steps: respectively weigh 0.3g ammonium tetrathiomolybdate, 0.15g graphene oxide, 2g thiourea, dissolve After ultrasonically mixing in 500mL DMF, use a rotary evaporator to remove most of the solvent in an oil bath at 90°C, then take out the sample and dry it under vacuum at 100°C in a watch glass, take it out after it is completely dry, grind it with a mortar, and place it Put it in a quartz boat, put it in a tube furnace, connect argon / hydrogen (10%) and argon with a tee, and then use soapy water to check for leaks, check whethe...

Embodiment 3

[0035] A molybdenum disulfide / sulfur and nitrogen-doped graphene nanosheet composite material of the present invention, in the composite material, molybdenum disulfide is loaded on sulfur, nitrogen-doped graphene nanosheet; the composite material is a diameter of 40 ~ 100nm wafer.

[0036] The preparation method of the molybdenum disulfide / sulfur and nitrogen-doped graphene nanosheet composite material of the present embodiment comprises the following steps: taking by weighing 0.2g ammonium tetrathiomolybdate, 0.2g graphene oxide, and 2.5g thiourea respectively, Dissolve in 1000mL DMF and ultrasonically mix evenly, remove most of the solvent by rotary evaporation in an oil bath at 100°C with a rotary evaporator, take out the sample and dry it in vacuum at 80°C in a watch glass, take it out after it is completely dry, and grind it finely with a mortar Put it in a quartz boat, put it in a tube furnace, connect argon / hydrogen (10%) and argon with a three-way connection, and then ...

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Abstract

The invention discloses a molybdenum disulfide / sulfur-and-nitrogen-doped graphene nanosheet composite material as well as a preparation method and an application thereof. According to the composite material, molybdenum disulfide is supported on a sulfur-and-nitrogen-doped graphene nanosheet. The preparation method of the composite material comprises steps as follows: ammonium tetrathiomolybdate, graphene oxide and thiourea are dissolved in N,N-dimethyl formamide and evenly mixed, a mixed solution is obtained, and then the mixed solution is dried and finally sintered in a protective gas; the mass ratio of the ammonium tetrathiomolybdate to the graphene oxide to the thiourea is in a range of (1-500):15:(10-1,000). The molybdenum disulfide / sulfur-and-nitrogen-doped graphene nanosheet composite material is wide in application range and can be applied to fields of lithium ion batteries, supercapacitors, hydrogen separation, photocatalysis, nanometer devices and the like.

Description

technical field [0001] The invention relates to inorganic nanometer materials, in particular to a nanocomposite material and its preparation method and application. Background technique [0002] At present, as a new type of high-energy and pollution-free chemical power source, lithium-ion batteries have been favored by energy chemistry researchers around the world. Compared with traditional primary batteries and secondary batteries, lithium-ion batteries have high discharge voltage, small self-discharge, and no pollution. Memory effect and other advantages, widely used in information, electronics, transportation, national defense and military fields. Among many transition metal materials, MoS 2 As a graphene-like layered material, in addition to its wide application in the fields of lubrication and catalysis, researchers in recent years have found that it also has great application prospects in the field of lithium battery anode materials. MoS 2 As a negative electrode ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36B82Y30/00
CPCB82Y30/00B82Y40/00H01M4/364H01M4/38H01M4/587H01M10/0525H01M2300/0091Y02E60/10
Inventor 王双印刘秋红吴振军吴江红马兆玲窦烁
Owner HUNAN UNIV
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