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Sea urchin-like boron nitride nanosheet-nanotube hierarchical structure and preparation method thereof

A hierarchical structure, boron nitride technology, applied in chemical instruments and methods, nitrogen compounds, nanotechnology, etc., can solve problems such as sea urchin-like boron nitride nanosheet-nanotube hierarchical structure, etc., to achieve uniform morphology, Good oxidation resistance and good repeatability

Active Publication Date: 2017-09-15
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, there are no patents and literature reports on the sea urchin-like boron nitride nanosheet-nanotube hierarchical structure

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  • Sea urchin-like boron nitride nanosheet-nanotube hierarchical structure and preparation method thereof
  • Sea urchin-like boron nitride nanosheet-nanotube hierarchical structure and preparation method thereof
  • Sea urchin-like boron nitride nanosheet-nanotube hierarchical structure and preparation method thereof

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Embodiment 1

[0030] A sea urchin-like boron nitride nanosheet-nanotube hierarchical structure is prepared by the following method:

[0031] (1) Preparation of B@Ni(HCO 3 ) 2 Precursor: Add 0.05g of polyvinylpyrrolidone K30, 0.1mol of amorphous boron powder and 0.01mol of nickel nitrate in 100ml of deionized water, stir magnetically and ultrasonically, then add 0.2mol of ammonium carbonate to the above solution and place it at a constant temperature of 60°C Stir magnetically in a water bath for 12 hours and filter; the filtrate is washed with water and dried in vacuum at 60°C for 12 hours to obtain B@Ni(HCO 3 ) 2 Precursor.

[0032] (2) Preparation and purification of sea urchin-like boron nitride nanosheet-nanotube hierarchical structure: B@Ni(HCO 3 ) 2 The precursor was placed in a vacuum tube furnace. In an ammonia atmosphere with a flow rate of 50ml / min, the temperature was raised from room temperature to 1100°C at a rate of 10°C / min, and kept for 1h; then the temperature was conti...

Embodiment 2

[0035] A sea urchin-like boron nitride nanosheet-nanotube hierarchical structure is prepared by the following method:

[0036] (1) Preparation of B@Ni(HCO 3 ) 2 Precursor: add 0.5g of polyvinylpyrrolidone K30, 0.1mol of amorphous boron powder and 0.05mol of nickel nitrate in 100ml of deionized water, stir magnetically and ultrasonically, then add 0.5mol of ammonium bicarbonate to the above solution and place at 70°C Magnetically stirred in a constant temperature water bath for 6h, filtered; the filtrate was washed with water and vacuum dried at 60°C for 12h to obtain B@Ni(HCO 3 ) 2 Precursor.

[0037] (2) Preparation and purification of sea urchin-like boron nitride nanosheet-nanotube hierarchical structure: B@Ni(HCO 3 ) 2 The precursor was placed in a vacuum tube furnace. In an ammonia atmosphere with a flow rate of 100ml / min, the temperature was raised from room temperature to 1100°C at a rate of 15°C / min, and kept for 2 hours; then the temperature was continued at a ra...

Embodiment 3

[0040] A sea urchin-like boron nitride nanosheet-nanotube hierarchical structure is prepared by the following method:

[0041] (1) Preparation of B@Ni(HCO 3 ) 2 Precursor: Add 0.1g of polyvinylpyrrolidone K30, 0.1mol of amorphous boron powder and 0.01mol of nickel nitrate in 100ml of deionized water, stir magnetically and ultrasonically, then add 0.3mol of ammonium bicarbonate to the above solution and place at 80°C Stir magnetically in a constant temperature water bath for 3 hours and filter; the filtrate is washed with water and dried in vacuum at 60°C for 12 hours to obtain B@Ni(HCO 3 ) 2 Precursor.

[0042] (2) Preparation and purification of sea urchin-like boron nitride nanosheet-nanotube hierarchical structure: B@Ni(HCO 3 ) 2 The precursor was placed in a vacuum tube furnace. In an ammonia gas atmosphere with a flow rate of 150ml / min, the temperature was raised from room temperature to 1100°C at a rate of 15°C / min, and kept for 3 hours; then the temperature was con...

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Abstract

The invention specifically relates to a sea urchin-like boron nitride nanosheet-nanotube hierarchical structure and a preparation method thereof, belonging to the field of inorganic nano-materials. The preparation method comprises the following steps: successively adding a surfactant, amorphous boron powder and a nickel salt, carrying out magnetic stirring and ultrasonic treatment, then adding an ammonium salt, placing the obtained mixture in a constant-temperature water-bath pot for magnetic stirring and filtering and then carrying out washing and vacuum drying so as to obtain a core-shell-structure-like B@Ni(HCO3)2 precursor; placing the obtained precursor in a vacuum tubular furnace, carrying out heating to a certain temperature in an ammonia gas atmosphere for a heat treatment reaction and then carrying out natural cooling to room temperature so as to obtain a solid crude product; and treating the crude product so as to obtain the pure sea urchin-like boron nitride nanosheet-nanotube hierarchical structure. The sea urchin-like boron nitride nanosheet-nanotube hierarchical structure prepared by using the method is formed by assembling of nanosheets and nanotubes and has good crystallinity, uniform morphology, stable structure, good resistance to oxidation and good application prospects in the field of functional composite materials.

Description

technical field [0001] The invention belongs to the field of inorganic nanometer materials, in particular to a sea urchin-like boron nitride nanosheet-nanotube hierarchical structure and a preparation method thereof. Background technique [0002] In recent years, the research on nanomaterials has developed from nanomaterials with zero-dimensional, one-dimensional, two-dimensional structures to multidimensional and hierarchical nanostructures. The basic structural units of hierarchical nanostructures mainly include nanoparticles, nanotubes, nanorods, nanofibers and nanosheets. The emergence of such materials has also enabled people to further understand the physical and interface effects in nanomaterials. For example, hierarchical nanostructures often exhibit mechanical, electrical, thermal, optical, and magnetic properties different from conventional low-dimensional materials, which provide a new strategy for the creation of functional materials and the construction of nanod...

Claims

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Application Information

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IPC IPC(8): C01B21/064B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B21/064C01P2002/72C01P2002/82C01P2002/88C01P2004/03C01P2004/04C01P2004/30C01P2004/50C01P2004/51C01P2004/61C01P2004/64C01P2006/37
Inventor 傅正义王恒平航王为民王皓
Owner WUHAN UNIV OF TECH
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