Carbon-coated nickel oxide nano composite material and preparation method and application thereof

A technology of nanocomposite materials and nickel oxide, which is applied in the direction of oxidative preparation of carboxylic acids, preparation of organic compounds, chemical instruments and methods, etc., can solve complex catalyst preparation process, low conversion rate of cyclohexane, and low selectivity of adipic acid and other problems, to achieve the effect of good industrial application prospects, high conversion rate and high selectivity, and excellent activity

Active Publication Date: 2021-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prior art has disadvantages such as low conversion rate of cyclohexane or low selectivity of adipic acid or complex catalyst preparation process and high cost.

Method used

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  • Carbon-coated nickel oxide nano composite material and preparation method and application thereof
  • Carbon-coated nickel oxide nano composite material and preparation method and application thereof
  • Carbon-coated nickel oxide nano composite material and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0056] The second aspect of the present invention also provides the preparation method of the aforementioned carbon-coated nickel oxide nanocomposite, comprising the following steps: placing nickel source and carboxylic acid in a solvent and mixing to form a homogeneous solution; removing the solvent in the homogeneous solution , to obtain a precursor; pyrolyzing the precursor under an inert atmosphere or a reducing atmosphere; and subjecting the pyrolyzed product to oxygen treatment to obtain a nanocomposite material; wherein, the carboxylic acid is a mixture of polyvalent organic carboxylic acids and nitrogen-containing compounds , or nitrogen-containing organic carboxylic acids.

[0057] Specifically, the precursor is a water-soluble mixture, which refers to a mixture of a nickel source and a polyhydric organic carboxylic acid and a nitrogen-containing compound, or a nickel source and a nitrogen-containing organic carboxylic acid in water, ethanol and other solvents Dissolv...

Embodiment 1

[0087] This example is used to illustrate the preparation method of the nitrogen-doped carbon-coated nickel oxide nanocomposite material of the present invention.

[0088] (1) Weigh 10g of nickel acetate, 10g of citric acid, and 20g of hexamethylenetetramine into 100mL of deionized water, stir at 70°C to obtain a homogeneous solution, and continue heating to evaporate to dryness to obtain a precursor.

[0089] (2) Put the precursor in the porcelain boat, then put the porcelain boat in the constant temperature zone of the tube furnace, pass nitrogen gas, the flow rate is 100mL / min, and raise the temperature to 550°C at a rate of 5°C / min, and keep the temperature for 2 hours Stop heating and cool to room temperature under a nitrogen atmosphere to obtain a nitrogen-doped carbon-coated nickel nanocomposite.

[0090] (3) the nanocomposite material that step (2) is obtained is placed in the porcelain boat, then the porcelain boat is placed in the constant temperature zone of tubular...

Embodiment 2

[0093] This example is used to illustrate the preparation method of the nitrogen-doped carbon-coated nickel oxide nanocomposite material of the present invention.

[0094] (1) Weigh 20g of nickel acetate, add 10g of ethylenediaminetetraacetic acid into 150mL of deionized water, stir and react at 60°C for 24h, continue to heat and evaporate to dryness, and grind the solid to obtain a precursor.

[0095] (2) Put the precursor in the porcelain boat, then place the porcelain boat in the constant temperature zone of the tube furnace, pass nitrogen gas, flow rate 100mL / min, and raise the temperature to 600°C at a rate of 4°C / min, and keep the temperature for 2 hours Stop heating and cool to room temperature under a nitrogen atmosphere to obtain a nitrogen-doped carbon-coated nickel nanocomposite.

[0096] (3) the product obtained in step (2) is placed in a porcelain boat, then the porcelain boat is placed in the constant temperature zone of the tube furnace, and the standard gas (ox...

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Abstract

The invention provides a carbon-coated nickel oxide nano composite material and a preparation method and application thereof, including a method for catalyzing nitrous oxide decomposition by utilizing a catalyst containing the nano composite material and a method for preparing adipic acid by utilizing the catalyst containing the nano composite material to catalyze and oxidize cyclohexane. The nano composite material comprises a nuclear membrane structure with an outer membrane and an inner core, the outer membrane is a nitrogen-doped graphitized carbon membrane, the inner core comprises nickel oxide nano particles, and the carbon content accounts for not more than 5 wt% of the nano composite material. As a catalyst active component, the nano composite material can effectively catalyze and decompose nitrous oxide, and is beneficial to solving the problem of eliminating high-concentration N2O generated in the production process of adipic acid plants, nitric acid plants and the like. In addition, the nitrogen-doped carbon-coated nickel oxide nanocomposite can catalyze cyclohexane oxidation under mild conditions, can realize high-conversion-rate and high-selectivity one-step preparation of adipic acid from cyclohexane, and has a good industrial application prospect.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a carbon-coated nickel oxide nanocomposite material and a preparation method and application thereof. Background technique [0002] Transition metal oxides have excellent catalytic properties and photoelectromagnetic properties, and are research hotspots in the field of inorganic materials. They are widely used in energy storage materials, catalytic materials, magnetic recording materials, and biomedicine. Carbon materials have good electrical conductivity, good chemical / electrochemical stability, and high structural strength. Coating the nanoparticles of active metals or metal oxides with carbon materials can effectively improve the conductivity and stability of the nanomaterials, and have a limited effect on the nanoparticles so that they are not easy to agglomerate. In recent years, carbon-coated nanomaterials have been widely used in electrocatalysis, supercapacitor materials, anode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J23/755B01J37/08B01J37/14C07C51/31C07C55/14B01D53/86B01D53/56
CPCB01J27/24B01J23/755B01J35/0013B01J35/0086B01J37/082B01J37/14C07C51/313B01D53/8628B01D2257/402C07C55/14Y02C20/10Y02P20/30Y02P20/50
Inventor 荣峻峰于鹏谢婧新宗明生吴耿煌林伟国纪洪波
Owner CHINA PETROLEUM & CHEM CORP
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