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Preparation method of ultrathin boron nitride nanosheet with high specific surface area

A technology of boron nitride and nanosheets, applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve the problems of few products, difficult to obtain, and limit the application of BNNSs, and achieve large pore volume, high thermal stability, high The effect of specific surface area

Inactive Publication Date: 2010-12-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limitation of the preparation method, the amount of the obtained product is less (currently generally <5-10 mg), and it is difficult to obtain a large amount, which limits the application of BNNSs

Method used

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  • Preparation method of ultrathin boron nitride nanosheet with high specific surface area
  • Preparation method of ultrathin boron nitride nanosheet with high specific surface area
  • Preparation method of ultrathin boron nitride nanosheet with high specific surface area

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Experimental program
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Embodiment 1

[0034] In a typical synthesis, 20 mmol B 2 o 3 , 130mmol zinc powder and 50mmol N 2 h 4 2HCl was mixed evenly and placed in a 20mL reaction kettle. Seal the reaction kettle, raise the temperature from room temperature to 500°C at a rate of 10°C / min in an electric furnace, and keep it at 500°C for 12 hours, then cool naturally, and the initial product is treated with diluted hydrochloric acid overnight to remove by-products. It was then filtered and dried at 80°C. The product is about 0.33g.

[0035] Using infrared spectrometer, X-ray powder diffractometer, transmission electron microscope (TEM, Hitachi H-7000), high resolution transmission electron microscope (HRTEM, JEOL-2100, 200kV), thermogravimetric analyzer, specific surface area and pore distribution instrument (NAVA2000e) in 77K for nitrogen adsorption-desorption analysis.

[0036] The obtained samples were first characterized by powder diffraction, as figure 1 , at 26.24 (3.394 ) and 42.08° (2.145 ) have two...

Embodiment 2

[0045] As described in Example 1, the difference is:

[0046] 40mmol B 2 o 3 , 200mmol zinc powder and 50mmol N 2 h 4 2HCl was mixed evenly and placed in a 20mL reactor, reacted at 500°C for 6h, and dried to obtain 1g of the product. The obtained XRD is as Figure 6 shown.

Embodiment 3

[0048] As described in Example 1, the difference is that Zn is replaced by equimolar magnesium powder, and the obtained product is mainly flakes with a diameter of more than 10 nm. Such as Figure 7 shown.

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Abstract

The invention relates to a preparation method of an ultrathin boron nitride nanosheet with high specific surface area. Boron oxide, zinc oxide, iron oxide or nickel oxide reacts with hydrazine hydrochloride, ammonium chloride or ammonium bromide at a temperate temperature to prepare the boron nitride ultrathin nanometer slice with the thickness is 2-6 nm in a high temperature agitated reactor. Because of high heat stability, high specific surface area (226 m<2> / g) and larger pore volume (0.405 cm<3> / g), the ultrathin boron nitride nanosheet can be used for preparing a catalytic agent carrier and the like.

Description

technical field [0001] The invention belongs to the field of preparing ultra-thin boron nitride nano-sheets (BNNSs) materials with high specific surface area, and in particular relates to a method for synthesizing ultra-thin boron nitride nano-materials with high specific surface area at relatively mild temperature by using solid-state reaction. Background technique [0002] In recent years, graphene has aroused widespread research interest due to its unique physical and chemical properties and potential application prospects, and is a star in the field of material science research. Its superior electron transport properties may lead to innovations in the field of electronic devices, see Nature 2006, 444, 347. In addition, multilayer carbon nanosheets (nanobelts or nanosheets) below 20nm have also attracted widespread attention due to their high specific surface area, sharp openings and other superior properties. See Adv.Mater., 2002, 14, 64 -67. [0003] Boron nitride has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/064
Inventor 徐立强王连成钱逸泰尉云平
Owner SHANDONG UNIV
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