Preparation method of copper-iron bimetal confinement nitrogen-doped carbon nanotube composite material

A copper-iron bimetallic, nitrogen-doped carbon technology is applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc. Uneven distribution of points, inability to scale production, etc., to achieve the effect of easy control of reaction process conditions, low catalytic activity and low cost

Pending Publication Date: 2021-10-08
HEFEI UNIV OF TECH
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Problems solved by technology

[0006] Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a method for preparing a copper-iron bimetallic confined nitrogen-doped carbon nanotube composite material. The technical problems to be solved include: 1. Selecting a suitable carbon carrier, solving the problem of catalyst The problem of uneven distribution of active sites; 2. Solve the problems of complicated preparation process of bimetallic metal organic framework materials, harsh experimental conditions, and incapable of large-scale production

Method used

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  • Preparation method of copper-iron bimetal confinement nitrogen-doped carbon nanotube composite material
  • Preparation method of copper-iron bimetal confinement nitrogen-doped carbon nanotube composite material

Examples

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Embodiment 1

[0027] (1) Precursor preparation process: Take a certain amount of concentrated hydrochloric acid to prepare 20mL hydrochloric acid solution (concentration is 3M), and copper foil (2×2cm 2) soaked in hydrochloric acid solution for 24 hours to remove the oxide layer on the surface of the copper foil, and then rinse the copper foil treated with hydrochloric acid with deionized water and methanol in sequence. Weigh 6.5g of 2-methylimidazole and 0.44g of iron acetylacetonate and disperse them in 80mL of methanol solution and keep stirring, then add 2.9g of copper foil after pickling to the above solution and sonicate for 1 hour to obtain A liquid. Next, 6.0 g of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 40 mL of methanol to obtain liquid B. Then pour liquid B into liquid A quickly and stir at 25°C for 24 hours, centrifuge to collect the precipitate of copper-iron bimetallic metal-organic framework precursor, wash with methanol three times and dry in an oven at 60°C to obtain the pr...

Embodiment 2

[0033] In this example, a copper-iron bimetallic confined nitrogen-doped carbon nanotube composite material was prepared in the same manner as in Example 1, except that the pyrolysis temperature was 1050°C.

[0034] After testing, the composite material prepared in this embodiment has a carbon nanotube structure, and the bimetallic copper and iron are highly dispersed in the metal-organic framework-derived nitrogen-doped carbon nanotubes, and have high catalytic activity.

[0035] The same method as in Example 1 was used to test the catalytic performance of the composite material prepared in this example. After testing, the degradation rate of organic pollutant Golden Orange II and heavy metal pollutant hexavalent chromium reached 100%.

Embodiment 3

[0037] In this example, a copper-iron bimetallic confined nitrogen-doped carbon nanotube composite material was prepared in the same manner as in Example 1, with the only difference being that the amount of methanol used in liquid A was 40 mL, and the amount of methanol in liquid B was 20 mL during the preparation of the precursor.

[0038] After testing, the composite material prepared in this embodiment has a carbon nanotube structure, and the bimetallic copper and iron are highly dispersed in the metal-organic framework-derived nitrogen-doped carbon nanotubes, and have high catalytic activity.

[0039] The same method as in Example 1 was used to test the catalytic performance of the composite material prepared in this example. After testing, the degradation rate of organic pollutant Golden Orange II and heavy metal pollutant hexavalent chromium reached 100%.

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Abstract

The invention discloses a preparation method of a copper-iron bimetal confinement nitrogen-doped carbon nanotube composite material, which comprises the following steps: firstly, obtaining a copper-iron bimetal metal organic framework precursor by a liquid phase diffusion method, and then transferring the precursor into a tubular furnace by an in-situ pyrolysis method, and calcining and pyrolyzing in inert gas to obtain a target product. According to the obtained catalyst, monatomic iron and copper nanoparticles are anchored on carbon nanotubes through coordination, the catalytic site density is high, the specific surface area is large, the conductivity is good, and the catalyst shows excellent performance and wide application prospects in the fields of adsorption separation, catalysis, energy storage and the like; the preparation method is simple in preparation process and low in cost, and has wide application prospects and practical value.

Description

technical field [0001] The invention relates to the field of preparation of inorganic catalysts, in particular to a method for preparing a copper-iron bimetallic confined nitrogen-doped carbon nanotube composite material. Background technique [0002] Transition metal-confined nitrogen-doped carbon nanotube composites have become promising candidates for electrochemical catalysis, energy, and energy due to their excellent specific surface area, surface physicochemical properties, unique metal-carbon bonds, and noble metal-like d-state density close to the Fermi level. It is a promising catalyst material in environmental catalysis and other aspects. However, the synthesis of traditional nitrogen-doped carbon nanotube materials often has defects such as cumbersome preparation process, high energy consumption, and low yield, which makes it unsuitable for large-scale and industrial production. In recent years, metal-organic framework materials have been used as precursors to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/72C02F101/38C02F101/22
CPCB01J27/24C02F1/725C02F2101/38C02F2101/22
Inventor 姚运金张阳洋尹红玉胡红伟刘笑言唐英豪
Owner HEFEI UNIV OF TECH
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