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Supporting or non-supporting type transition metal @h-BN core-shell nanostructure preparation method

A nanostructure and transition metal technology, applied in metal processing equipment, nanotechnology, nanotechnology, etc., can solve the problems of complex preparation process, expensive raw materials, poor repeatability, etc., and achieve easy control of reaction conditions, easy scale-up production, and wide application foreground effect

Active Publication Date: 2018-09-07
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there is little work on coating boron nitride shells on the surface of metal particles. At the same time, there are problems such as complex preparation process, expensive raw materials, and poor repeatability. Therefore, a core-shell structure that can prepare boron nitride-coated metal nanoparticles is studied. , while the preparation method is simple and the raw materials are cheap, it is very necessary

Method used

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  • Supporting or non-supporting type transition metal @h-BN core-shell nanostructure preparation method
  • Supporting or non-supporting type transition metal @h-BN core-shell nanostructure preparation method
  • Supporting or non-supporting type transition metal @h-BN core-shell nanostructure preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of iron-boron alloy (FeB): Dissolve 0.6977g of ferrous sulfate heptahydrate in 25mL of deionized water under the protection of argon and stir in an ice bath; dissolve 0.0412g of sodium hydroxide in 10mL of deionized water, and after cooling , then add 0.5362g of potassium borohydride to dissolve; add the potassium borohydride solution dropwise to the ferrous sulfate solution, after the dropwise addition, continue to stir for 0.5h, use a magnet for magnetic separation, wash with water until neutral, wash with ethanol three times, vacuum 40 Dry at ℃ for 8 hours to obtain iron-boron alloy (FeB).

[0045] Raise the temperature of the FeB alloy to 500°C at 5°C / min in an ammonia atmosphere, keep it for 2h, continue to heat it up to 850°C at 5°C / min in an ammonia atmosphere, keep it for 1h, and cool it down to room temperature in an argon atmosphere to obtain Fe@h -BN core-shell nanomaterials.

[0046] figure 1 It is a high-resolution electron microscope photo o...

Embodiment 2

[0052] Pipetting concentration is the ruthenium trichloride RuCl of 0.0964mol / L 3 20mL aqueous solution was placed on a stirring table at room temperature and stirred; 0.0330g sodium hydroxide was dissolved in 8mL deionized water, after cooling, 0.4290g potassium borohydride was added to dissolve; potassium borohydride solution was added dropwise to ruthenium trichloride solution After the dropwise addition, continue to stir for 2h, separate by suction filtration, wash with water until neutral, wash with ethanol three times, and dry at 60°C for 8h in vacuum to obtain ruthenium boron alloy (RuB).

[0053] The RuB alloy was heated up to 500°C at 5°C / min in an ammonia atmosphere, kept for 4h, continued to be heated at 5°C / min in ammonia gas to 700°C, kept for 3h, and dropped to room temperature in an argon atmosphere to obtain Ru@h-BN Core-shell nanomaterials.

[0054] Figure 6 It is a transmission electron microscope photo of the Ru@h-BN sample. It can be seen that the nanopa...

Embodiment 3

[0057] Pipetting concentration is the ruthenium trichloride RuCl of 0.0964mol / L 3 5mL aqueous solution was placed on a stirring table at room temperature and stirred, and 1.0091g ​​of carrier XC-72 was weighed in RuCl 3 Add 100mL of deionized water to the solution, and stir evenly after ultrasonication; dissolve 0.0083g of sodium hydroxide in 4mL of deionized water, and after cooling, add 0.1134g of potassium borohydride to dissolve; add the potassium borohydride solution dropwise to the trichloro In the ruthenium solution, after the dropwise addition, continue to stir for 2 hours, separate by suction filtration, wash with water until neutral, wash with ethanol three times, and dry in vacuum at 30°C for 14 hours to obtain a ruthenium-boron alloy (5% RuB / C) supported by XC-72 .

[0058] The temperature of 5% RuB / C alloy was raised to 500°C at 5°C / min in ammonia atmosphere, kept for 2h, continued to be heated at 5°C / min in ammonia gas to 600°C, kept for 4h, and cooled to room t...

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Abstract

The invention discloses a supporting or non-supporting type transition metal @h-BN core-shell nanostructure preparation method. According to the preparation method, transition metal salt serves as a precursor, KBH4 or NaBH4 serves as a reducing agent, reduction of metal ions is carried out in a solution system, and an amorphous alloy nanostructure (TMB) comprising transition metal (TM) and boron (B) element is obtained; and the TMB structure is heated to 500 DEG C-850 DEG C under the nitrogenous atmosphere, the temperature is kept for 1 h-3 h, cooling is carried out to the room temperature inthe inert gas atmosphere, and the core-shell nanostructure with a metal core and h-BN shell layer is obtained. The preparation method is simple and convenient in preparing process, the raw material price is low, the process repeatability is good, operation is safe and reliable, macro-quantity preparation can be achieved, and amplification production is easy. The prepared raw material structure isunique, and important application to the processes of catalysis, energy resources and the like is achieved.

Description

technical field [0001] The present invention relates to a preparation method of a loaded or unloaded metal @h-BN core-shell nanomaterial, in particular to a loaded or unloaded transition metal @h-BN core-shell nanostructure Preparation. Background technique [0002] The discovery of nanomaterials and their excellent properties have opened up new directions in the field of materials science and engineering. More and more new nanomaterials have been synthesized, such as nanoparticles, nanoclusters, nanowires, nanorods, nanofilms, etc. . Although single-component nanomaterials have shown excellent properties, multi-component nanomaterials show more outstanding properties and performances in many cases; in this case, nanocomposites with core-shell structures have begun to appear in people in the field of vision. The core-shell nanostructure is a layer of other materials coated on the surface of nanoparticles by physical or chemical methods to obtain a special structure of two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F9/22B22F1/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/22B22F9/24B22F1/0553B22F1/07B22F1/16B22F1/054
Inventor 傅强陈思如赵偲钦包信和
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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