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Composite material of high-nitrogen-doped grapheme and ultrathin MoSe2 nanosheets and preparation method of composite material

A technology of nitrogen-doped graphene and composite materials, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve problems such as difficulties and few researches, and achieve simple operation, controllable reaction conditions and high yield Effect

Inactive Publication Date: 2014-12-24
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the drawbacks and deficiencies of the above-mentioned technologies are: (1) For such nanocomposites, there are relatively few studies on further functionalization of graphene, such as heteroatom doping; (2) Exposure of active sites through surfactants (Active Edge Sites), there is no related research; (3) In addition, compared to MoS 2 , for MoSe 2 There are very few studies, especially the liquid-phase synthesis of high-quality MoSe 2 This is also a big difficulty

Method used

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  • Composite material of high-nitrogen-doped grapheme and ultrathin MoSe2 nanosheets and preparation method of composite material
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  • Composite material of high-nitrogen-doped grapheme and ultrathin MoSe2 nanosheets and preparation method of composite material

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Embodiment 1

[0029] This embodiment includes the following steps:

[0030] 1) Preparation of low-nitrogen-doped graphene: Disperse 500 mg of graphene oxide (produced by the Hummers method) into 100 mL of aqueous solution, stir and ultrasonically disperse it evenly; then add 5 mL of NH to the dispersion 3 ·H 2 O (20%), stirring and heating to 90 ° C, through a chemical reaction for 2 hours, to obtain rough low-nitrogen graphene; finally, obtain low-nitrogen graphene with excellent quality through dialysis.

[0031] 2) Preparation of chemical reaction solution: 0.2mmol of ammonium molybdate tetrahydrate, i.e. (NH 4 ) 6 Mo 7 o 24 4H 2 O and 3mmol of Na 2 SeO 3 dissolved in 15mL H 2 In a mixed solution composed of O and 15mL ethylene glycol, stir for 15 minutes;

[0032] Add 5 mL of ethylenediamine (ETA) stabilizer to the above solution, stir for 15 minutes; get 5 low-nitrogen-doped graphene and add to the above solution, stir and sonicate for 30 minutes;

[0033] 3) Solvothermal hig...

Embodiment 2

[0035] This embodiment includes the following steps:

[0036] 1) Preparation of low-nitrogen-doped graphene: Disperse 500 mg of graphene oxide (produced by the Hummers method) into 100 mL of aqueous solution, stir and sonicate to disperse evenly; then add 10 mL of NH to the dispersion 3 ·H 2 O (20%), stirring and heating to 90 ° C, through a chemical reaction for 10 hours, to obtain rough low-nitrogen graphene; finally, obtain high-quality low-nitrogen graphene through dialysis.

[0037] 2) Preparation of chemical reaction solution: 0.5 mmol of ammonium molybdate tetrahydrate, i.e. (NH 4 ) 6 Mo 7 o 24 4H 2 O and 10mmol of Na 2 SeO 3 dissolved in 15mL H 2 In a mixed solution composed of O and 15mL ethylene glycol, stir for 15 minutes;

[0038] Add 15mL of ethylenediamine (ETA) stabilizer to the above solution, stir for 15 minutes; get 15mL of low-nitrogen-doped graphene and add to the above solution, stir and sonicate for 30 minutes;

[0039] 3) Solvothermal high nitr...

Embodiment 3

[0041] This embodiment includes the following steps:

[0042] 1) Preparation of low-nitrogen-doped graphene: Disperse 500 mg of graphene oxide (produced by the Hummers method) into 100 mL of aqueous solution, stir and sonicate to disperse evenly; then add 15 mL of NH to the dispersion 3 ·H 2 O (20%), stirring and heating to 90 ° C, through a chemical reaction for 10 hours, to obtain rough low-nitrogen graphene; finally, obtain high-quality low-nitrogen graphene through dialysis.

[0043] 2) Preparation of chemical reaction solution: 1.5mmol of ammonium molybdate tetrahydrate, i.e. (NH 4 ) 6 Mo 7 o 24 4H 2 O and 15mmol of Na 2 SeO 3 dissolved in 15mL H 2 In a mixed solution composed of O and 15mL ethylene glycol, stir for 15 minutes;

[0044] Add 25mL of ethylenediamine (ETA) stabilizer to the above solution, stir for 15 minutes; get 20mL of low-nitrogen-doped graphene and add to the above solution, stir and sonicate for 30 minutes;

[0045] 3) Solvothermal high nitro...

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Abstract

The invention provides a composite material of high-nitrogen-doped grapheme and ultrathin MoSe2 nanosheets and a preparation method of the composite material. According to the method, after a molybdenum source, a selenium source and low-nitrogen-doped grapheme which are dissolved in water and ethylene glycol are sufficiently mixed, solvent thermal reaction is conducted under the effect of ethidene diamine serving as an active agent, the ultrathin MoSe2 nanosheets are made to grow on the grapheme evenly, meanwhile, the low-nitrogen-doped grapheme is doped deeply, and finally the composite material of the high-nitrogen-doped grapheme and the ultrathin MoSe2 nanosheets is obtained. The high-nitrogen-doped grapheme / molybdenum selenide nanosheets synthesized through the method have the excellent performances of high conductivity, high catalysis and the like at the same time, and can be widely applied to photocatalysis, chemical catalysis, electrodes of solar cells, electrodes of other new energy batteries and electrode materials of super-capacitors.

Description

technical field [0001] The present invention relates to a composite material in the technical field of nanomaterial preparation and its preparation, specifically a kind of high nitrogen doped graphene and ultrathin MoSe 2 Composite materials of nanosheets and methods for their preparation. Background technique [0002] Transition metal sulfur, selenide MX 2 (M=Mo, W, Nb, Ta; X=S, Se) has attracted extensive attention from researchers because of its layered structure similar to graphene. Such materials are used in the fields of optoelectronics, catalysis, and superconductivity because of their excellent properties, such as catalytic properties, magnetism, and semiconductor properties. Remove MoS 2 Outside, MoSe 2 It is also a transition metal two-dimensional layered material, which has a sheet structure similar to graphite. The Mo atoms and Se atoms in the layer are covalently bonded, and the layers are connected by van der Waals force, and the layers are easily connected...

Claims

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Application Information

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IPC IPC(8): H01B1/04H01B5/14H01B13/00B01J27/24B82Y30/00B82Y40/00
Inventor 毕恩兵陈汉韩礼元
Owner SHANGHAI JIAO TONG UNIV
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