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A kind of nickel/noble metal/α-phase nickel hydroxide nanocomposite material, preparation method and application thereof

A nano-composite material, nickel hydroxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve high product purity and yield, solve the effect of operation process, and weaken the tendency of agglomeration

Active Publication Date: 2016-06-01
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation method is simple, continuous and environmentally friendly, and solves the multi-step complex operation process of the existing multi-layer core-shell structure

Method used

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  • A kind of nickel/noble metal/α-phase nickel hydroxide nanocomposite material, preparation method and application thereof
  • A kind of nickel/noble metal/α-phase nickel hydroxide nanocomposite material, preparation method and application thereof
  • A kind of nickel/noble metal/α-phase nickel hydroxide nanocomposite material, preparation method and application thereof

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Effect test

Embodiment 1

[0034] A nickel / palladium / α-phase nickel hydroxide nanocomposite material, the nanocomposite material has a magnetic core-shell structure, the surface morphology of the magnetic core-shell structure is flower-shaped, the core is nickel nanoparticles, and the palladium shell layer wraps nickel nanoparticles , the outermost layer is a nickel hydroxide protective layer, with an average particle size of 250nm.

[0035] A kind of preparation method of nickel / palladium / alpha phase nickel hydroxide nanocomposite material, the step comprises:

[0036] A. Mix 1mL10mmol·L at room temperature -1 Nickel nitrate solution and 0.15g polyvinylpyrrolidone were dissolved in 50mL water, and ultrasonically mixed to form a mixed solution;

[0037] B. After argon protection for 30 minutes, under continuous stirring at 20°C, add 20mL of newly configured 10mmol / L sodium borohydride solution to the mixed solution prepared in step A, react for 10 minutes, and then inject 8mL0. 5mmol·L -1 K 2 PdCl ...

Embodiment 2

[0043] A nickel / palladium / α-phase nickel hydroxide nanocomposite material, the nanocomposite material has a magnetic core-shell structure, the surface morphology of the magnetic core-shell structure is flower-shaped, the core is nickel nanoparticles, and the palladium shell layer wraps nickel nanoparticles , the outermost layer is a nickel hydroxide protective layer, with an average particle size of 300nm;

[0044] A kind of preparation method of nickel / palladium / alpha phase nickel hydroxide nanocomposite material, the step comprises:

[0045] A. Mix 1mL10mmol·L at room temperature -1 Nickel nitrate solution and 0.15g polyvinylpyrrolidone were dissolved in 50mL water, and ultrasonically mixed to form a mixed solution;

[0046] B. After argon protection for 30 minutes, under stirring at 30°C, add 15 mL of newly configured 20 mmol / L sodium borohydride solution to the mixed solution prepared in step A, react for 10 minutes, and then inject 8 mL into the mixed solution. .5mmol·L...

Embodiment 3

[0049] A nickel / palladium / α-phase nickel hydroxide nanocomposite material, the nanocomposite material has a magnetic core-shell structure, the surface morphology of the magnetic core-shell structure is flower-shaped, the core is nickel nanoparticles, and the palladium shell layer wraps nickel nanoparticles , the outermost layer is a nickel hydroxide protective layer, with an average particle size of 230nm;

[0050] A kind of preparation method of nickel / palladium / nickel hydroxide nano composite material, the step comprises:

[0051] A. Mix 1mL10mmol·L at room temperature -1 Nickel nitrate solution and 0.2g polyvinylpyrrolidone were dissolved in 50mL water, and ultrasonically mixed to form a mixed solution;

[0052] B. After argon protection for 30 minutes, under stirring at 15°C, add 10 mL of newly configured 6 mmol / L sodium borohydride solution to the mixed solution prepared in step A, react for 10 minutes, and then inject 8 mL into the mixed solution. .5mmol·L -1 K 2 PdC...

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Abstract

The invention relates to a nickel / noble metal / α phase nickel hydroxide nanocomposite material, a preparation method and its application. Nickel / noble metal / α-phase nickel hydroxide nanocomposite has a magnetic core-shell structure. The surface morphology of the magnetic core-shell structure is spherical, with an average particle size of about 230-300nm. The core is nickel nanoparticles, and the precious metal shell wraps the nickel nanoparticles. , the outermost layer is an α-phase nickel hydroxide protective layer; the preparation method steps include dissolving and mixing divalent nickel salt or its solution and polyvinylpyrrolidone, passing inert gas protection for more than 30 minutes, reacting with sodium borohydride solution, and then reacting with precious metals The salt solution is reacted and the reaction product is centrifuged. The composite material prepared by the invention has high purity and yield, special structure, good activity and magnetic properties, and strong stability, and can be effectively used in organic catalytic reactions. The preparation method is simple, continuous, controllable, the conditions are mild, and the equipment requirements are not high. Suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials, in particular to a nickel / noble metal / α-phase nickel hydroxide nanocomposite material, a preparation method and an application thereof. Background technique [0002] Due to its unique structure, core-shell nanocomposites exhibit many novel physical and chemical properties, which are of high value in basic theoretical research and industrial applications. Among them, the catalyst with core / shell structure can not only realize the controllable catalytic reaction, but also protect the core material from the chemical erosion of the external environment and solve the problem of nanoparticle agglomeration, which has become a research hotspot in the field of catalysis in recent years. By changing the material, structure, optical or surface properties of the core and shell, many special properties can be produced, which have broad application prospects in biology, light, electricity, magn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J35/02B01J35/00
Inventor 耿保友刘亚东
Owner ANHUI NORMAL UNIV
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