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Graphene tube-wrapped metal nitride nanobelt and preparation method thereof

A technology of graphene tubes and nanobelts, which is applied in the direction of graphene, nitrogen-metal/silicon/boron binary compounds, nano-carbon, etc., can solve the problems of capacity loss and poor dynamic performance, and achieve lower resistivity and better Electrochemical properties, the effect of facilitating the transport of electrons

Inactive Publication Date: 2014-12-24
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, metal oxides are mostly studied, but these metal oxides have some shortcomings, such as poor kinetic properties or capacity loss during cycling (especially at higher rates), which are required Very high rate performance is more evident in the field of supercapacitors

Method used

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  • Graphene tube-wrapped metal nitride nanobelt and preparation method thereof
  • Graphene tube-wrapped metal nitride nanobelt and preparation method thereof
  • Graphene tube-wrapped metal nitride nanobelt and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] The preparation of a graphene nanotube wrapped molybdenum nitride nanoribbon comprises the following steps:

[0033] 1) Weigh 20 mg of dried molybdenum trioxide, stir and ultrasonically disperse in distilled water, then add 1 mL of polydiallyl dimethyl ammonium chloride solution, continue to stir for 5 minutes and then centrifuge, measure 5 mL of 1 mg / mL prepared by Hummer method Graphene oxide dispersion liquid, add the concentrated molybdenum oxide liquid obtained by centrifugation into the graphene oxide dispersion liquid drop by drop, ultrasonically disperse and stir until the dispersion is even, then suction filter and dry;

[0034] 2) Remove the dried membrane from the filter membrane, and perform annealing treatment in an ammonia atmosphere at a heating rate of 1-10°C / min, an annealing temperature of 400-1200°C, and a holding time of 60-120min to obtain A graphene nanotube wrapped molybdenum nitride nanoribbon.

[0035] Such as figure 1 As shown, XRD proves tha...

Embodiment 2

[0040] The preparation of a graphene nanotube wrapped molybdenum nitride nanoribbon comprises the following steps:

[0041] 1) Weigh 100 mg of dried molybdenum trioxide, stir and ultrasonically disperse in distilled water, then add 15 mL of polydiallyl dimethyl ammonium chloride solution, continue stirring for 30 min and then centrifuge, measure 50 mL of 1 mg / mL prepared by Hummer method Graphene oxide dispersion liquid, add the concentrated molybdenum oxide liquid obtained by centrifugation into the graphene oxide dispersion liquid drop by drop, ultrasonically disperse and stir until the dispersion is even, then suction filter and dry;

[0042] 2) Remove the dried membrane from the filter membrane, and perform annealing treatment at an ammonia atmosphere at a heating rate of 1-10°C / min, an annealing temperature of 400-1200°C, and a holding time of 10-60min to obtain A graphene nanotube wrapped molybdenum nitride nanoribbon.

Embodiment 3

[0044] The preparation of a graphene nanotube wrapped molybdenum nitride nanoribbon comprises the following steps:

[0045] 1) Weigh 200mg of dried molybdenum trioxide, stir and ultrasonically disperse in distilled water, then add 30mL of polydiallyldimethylammonium chloride solution, continue stirring for 60min and then centrifuge, measure 100mL of 1mg / mL prepared by Hummer method Graphene oxide dispersion liquid, add the concentrated molybdenum oxide liquid obtained by centrifugation into the graphene oxide dispersion liquid drop by drop, ultrasonically disperse and stir until the dispersion is even, then suction filter and dry;

[0046] 2) Remove the dried membrane from the filter membrane, and perform annealing treatment in an ammonia atmosphere at a heating rate of 10-20°C / min, an annealing temperature of 400-1200°C, and a holding time of 10-120min to obtain A graphene nanotube wrapped molybdenum nitride nanoribbon.

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Abstract

The invention in particular relates to a graphene tube-wrapped metal nitride nanobelt and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a metal oxide precursor nanobelt; (2) stirring and ultrasonically dispersing the weighed and dried metal oxide precursor nanobelt in distilled water, adding a poly dimethyl diallyl ammonium chloride solution, continuously stirring, centrifuging, measuring graphene oxide dispersion liquid prepared by adopting an Hummer process, dropwise adding the metal oxide precursor nanobelt obtained by centrifuging into the graphene oxide dispersion liquid, ultrasonically dispersing and stirring, after dispersing uniformly, performing suction filtration, and drying; and (3) stripping a dried membrane from a filter membrane, and annealing in an ammonia gas atmosphere. According to the prepared graphene tube-wrapped metal nitride nanobelt, the specific surface area of a material can be enlarged, the one-dimensional nanostructure provides a one-dimensional channel for electrolyte flow and ionic migration, and the electrochemical performance is good.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite structures, and in particular relates to a graphene tube-wrapped metal nitride nanobelt and a preparation method thereof. Background technique [0002] In recent years, nanomaterials have attracted widespread attention due to their great scientific value and potential application value. Theoretical and experimental studies have shown that nanostructures exhibit superior properties compared to bulk materials. In particular, one-dimensional nanomaterials (such as nanowires and nanotubes) have one-dimensional electron conduction channels, thus exhibiting excellent photoelectrochemical properties. At present, metal oxides are mostly studied, but these metal oxides have some shortcomings, such as poor kinetic properties or capacity loss during cycling (especially at higher rates), which are required The field of supercapacitors with very high rate capability is more obvious. Therefore, how to ...

Claims

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Application Information

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IPC IPC(8): C01B21/06C01B31/04B82Y30/00C01B32/184
Inventor 霍开富王喆马国强
Owner HUAZHONG UNIV OF SCI & TECH
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