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Carbon-coated nickel carbide and nickel nano composite material as well as preparation method and application thereof

A nanocomposite material, carbon-coated nickel carbide technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, catalyst activation/preparation, etc. Cumbersome and other problems, to achieve the effect of good application prospects

Active Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, it can be seen that the current preparation of carbon-coated nickel carbide and nickel nanocomposites still has the disadvantages of cumbersome steps, the use of a large amount of organic solvents, and the high price of some ligands. Therefore, how to achieve green, simple, and low-cost preparation of nickel carbide and nickel nanocomposites are a difficult point in this field

Method used

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  • Carbon-coated nickel carbide and nickel nano composite material as well as preparation method and application thereof
  • Carbon-coated nickel carbide and nickel nano composite material as well as preparation method and application thereof
  • Carbon-coated nickel carbide and nickel nano composite material as well as preparation method and application thereof

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preparation example Construction

[0029] The invention provides a preparation method of carbon-coated nickel carbide and nickel nanocomposite material, comprising the following steps:

[0030] The precursor is prepared by mixing nickel source, nitrogen-free organic carboxylic acid and alkali metal salt;

[0031] The precursor is pyrolyzed in an inert atmosphere to obtain a nanocomposite;

[0032] Among them, the temperature of the pyrolysis is 345°C to 365°C, preferably 345°C to 360°C.

[0033] According to the present invention, the carbon-coated nickel carbide and nickel nanocomposite material prepared by the present invention contains a core-shell structure with a shell layer and an inner core, wherein the shell layer is a carbon layer, and the inner core includes nickel carbide and nickel nanoparticles, The carbon layer contains several layers of graphitized carbon layers. This kind of composite material with both nickel carbide and nickel core can exert many advantages of the material itself and produce...

Embodiment 1

[0053] This example is used to illustrate the preparation of carbon-coated nickel carbide and nickel nanocomposites

[0054] 1) Weigh 10.51g (50mmol) of citric acid monohydrate, 4.64g (50mmol) of nickel hydroxide, 11.69g (200mmol) of sodium chloride into 150mL of deionized water, stir at 110°C to obtain a homogeneous solution, and continue to heat and evaporate. Dry, the solid is ground to obtain the precursor.

[0055] 2) Take 9 g of the precursor obtained in step 1) and place it in a porcelain boat, then place the porcelain boat in the constant temperature zone of the tube furnace, feed nitrogen, flow 100 mL / min, and heat up to 330 ° C at a rate of 3 ° C / min Then, the temperature was raised to 350°C at a rate of 1°C / min, and the heating was stopped after 150 min at a constant temperature, and cooled to room temperature in a nitrogen atmosphere.

[0056] 3) Transfer the composite material in the porcelain boat of step 2) to a flask, add 50 mL of deionized water, stir at 60° ...

Embodiment 2

[0060] This example is used to illustrate the preparation of carbon-coated nickel carbide and nickel nanocomposites

[0061] 1) Weigh 10.51g (50mmol) citric acid monohydrate, 4.64g (50mmol) nickel hydroxide, 5.84g (100mmol) sodium chloride into 150mL deionized water, stir at 110°C to obtain a homogeneous solution, and continue to heat and steam. Dry, the solid is ground to obtain the precursor.

[0062] 2) Get 7g of the precursor obtained in step 1) and place it in a porcelain boat, then place the porcelain boat in the constant temperature zone of the tube furnace, feed nitrogen, flow 100 mL / min, and be warming up to 330 at a rate of 3°C / min After 1 °C, the temperature was raised to 350 °C at a rate of 1 °C / min, and the heating was stopped after 150 min at a constant temperature, and cooled to room temperature in a nitrogen atmosphere.

[0063] 3) Transfer the composite material in the porcelain boat of step 2) to a flask, add 50 mL of deionized water, stir at 60° C. for 20 m...

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Abstract

The invention provides a carbon-coated nickel carbide and nickel nano composite material as well as a preparation method and an application thereof. The preparation method comprises the following steps: mixing a nickel source, nitrogen-free organic carboxylic acid and alkali metal salt to prepare a precursor; and pyrolyzing the precursor in an inert atmosphere to obtain a nano composite material; wherein the pyrolysis temperature ranges from 345 DEG C to 365 DEG C. According to the method, the composite material can be prepared in a green, simple and efficient mode by adopting a method of pyrolyzing the metal salt precursor and strictly and accurately controlling reaction conditions, the utilization rate of nickel and carboxylic acid ligands in the precursor preparation process can reach 100%, waste water containing heavy metal is not generated, and the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of transition metal carbide composite materials, in particular to a carbon-coated nickel carbide and nickel nano-composite material and a preparation method and application thereof. Background technique [0002] Transition metal carbides are a class of interstitial compounds produced by the intercalation of carbon atoms into the lattice of transition metals, and have the properties of covalent solids, ionic crystals and transition metals. Transition metals and their carbides have many excellent properties, including high hardness and high electrical conductivity, and have applications in supercapacitors, catalysis, and electrocatalysis. [0003] The preparation of new carbon-based transition metal and carbide composites is an important research direction in this field. For example, Zhou et al. (Nano Letters, 2008, 8(4), 1147-1152) prepared Ni / Ni by liquid phase method. 3 C core-shell structure nanochain ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J37/08B82Y30/00B82Y40/00C07C5/03C07C15/073
CPCB01J27/22B01J37/082B82Y30/00B82Y40/00C07C5/03B01J35/23B01J35/33B01J35/397C07C15/073
Inventor 吴耿煌荣峻峰达志坚宗明生于鹏纪洪波
Owner CHINA PETROLEUM & CHEM CORP
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