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

A nanocomposite material, nickel oxide technology, applied in chemical instruments and methods, catalyst activation/preparation, nanotechnology for materials and surface science, etc., can solve the problems of high price and low activity, reduce air pollution, The effect of excellent activity and good industrial application prospects

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

Noble metal catalysts (such as Rh and Ru) on N 2 O catalytic decomposition has high low-temperature catalytic activity (250℃~350℃ range, can efficiently decompose N 2 O), but its expensive
The price of molecular sieve catalysts and transition metal oxide catalysts is significantly lower than that of noble metals, but the activity of these two types of catalysts for the catalytic decomposition of N2O is relatively low, and the temperature range for efficient decomposition is 450°C to 550°C. ℃

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

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preparation example Construction

[0052] The second aspect of the present invention also provides the preparation method of the aforementioned carbon-coated nickel oxide nanocomposite, comprising the following steps:

[0053] The nickel source and the polyvalent organic carboxylic acid are mixed in a solvent to form a homogeneous solution, and the solvent in the homogeneous solution is removed to obtain a precursor; the precursor is pyrolyzed in an inert atmosphere or a reducing atmosphere, and the pyrolyzed product is performing oxygen treatment; preparing a second metal salt solution, mixing the oxygen treated product with the second metal salt solution uniformly and stirring to obtain a solid-liquid mixture; and drying and roasting the solid-liquid mixture to obtain a nanocomposite material.

[0054] Specifically, the precursor is a water-soluble mixture, which refers to a nickel-containing water-soluble mixture obtained by dissolving a nickel source and a polyvalent organic carboxylic acid in a solvent such...

Embodiment 1

[0081] This example is used to illustrate the preparation method of the carbon-coated nickel oxide nanocomposite material of the present invention.

[0082] (1) Weigh 10 g of nickel carbonate and 10 g of citric acid into a beaker containing 100 mL of deionized water, stir at 70° C. to obtain a homogeneous solution, and continue heating and evaporating to dryness to obtain a solid precursor.

[0083] (2) Place the solid precursor obtained in step (1) in a porcelain boat, then place the porcelain boat in the constant temperature zone of the tube furnace, feed in nitrogen gas with a flow rate of 100mL / min, and heat at a rate of 4°C / min. The temperature was raised to 600°C, the temperature was kept constant for 2 hours, then the heating was stopped, and cooled to room temperature under a nitrogen atmosphere to obtain a carbon-coated nickel composite material.

[0084] (3) the product obtained in step (2) is placed in a porcelain boat, then the porcelain boat is placed in the const...

Embodiment 2

[0088] This example is used to illustrate the preparation method of the carbon-coated nickel oxide nanocomposite material of the present invention.

[0089] (1) Weigh 10g of nickel acetate and 10g of citric acid into a beaker containing 100mL of deionized water, stir at 70°C to obtain a homogeneous solution, continue heating and evaporate to dryness, and obtain a solid precursor.

[0090] (2) Place the solid precursor obtained in step (1) in a porcelain boat, then place the porcelain boat in the constant temperature zone of the tube furnace, feed nitrogen gas with a flow rate of 100mL / min, and set the temperature at a rate of 2°C / min. The temperature was raised to 650°C, the temperature was kept constant for 2 hours, then the heating was stopped, and cooled to room temperature under a nitrogen atmosphere to obtain a carbon-coated nickel composite material.

[0091] (3) the product obtained in step (2) is placed in a porcelain boat, then the porcelain boat is placed in the cons...

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Abstract

The invention provides a carbon-coated nickel oxide nano composite material and a preparation method and application thereof. The method comprises a method for catalytically decomposing nitrous oxide by adopting a catalyst containing the nano composite material. The nano composite material comprises a nuclear membrane structure with an outer membrane and an inner core, the outer membrane is a graphitized carbon membrane, the inner core comprises nickel oxide nano particles, the nano composite material further comprises second metal, the second metal is alkali metal and / or alkaline earth metal, and the molar ratio of the second metal to nickel is 0.01-0.3. When the nanometer composite material doped with the alkali metal and / or the alkaline earth metal is used for catalyzing the decomposition reaction of nitrous oxide, the catalytic activity can be further improved, the problem of eliminating high-concentration N2O generated in the production process of adipic acid plants, nitric acid plants and the like can be solved, and the nanometer composite material has good industrial application prospects.

Description

technical field [0001] The invention relates to the technical field of composite materials, 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, supercapaci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J37/02B01J37/08B01J37/14B01J37/06B82Y30/00B82Y40/00B01D53/86B01D53/56
CPCB01J23/78B01J37/0201B01J37/082B01J37/14B01J37/06B82Y30/00B82Y40/00B01D53/86B01D53/56B01D2257/402B01J35/23Y02C20/10Y02P20/30
Inventor 于鹏荣峻峰徐国标林伟国吴耿煌谢婧新宗明生纪洪波
Owner CHINA PETROLEUM & CHEM CORP
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