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Preparation method and application of a nitrogen-doped carbon material catalyst

A nitrogen-doped carbon and catalyst technology is applied in the field of preparation of nitrogen-doped carbon material catalysts, which can solve the problems of poor stability and high metal cost, and achieve the effects of high stability, low equipment requirements, and reduced production costs.

Active Publication Date: 2021-05-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common problem faced by these catalysts is that the metal cost is relatively high, and the stability is relatively poor
Moreover, the catalysts used for the hydrogenation reaction of aromatic nitro compounds often require relatively harsh conditions, high temperature and high pressure.

Method used

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  • Preparation method and application of a nitrogen-doped carbon material catalyst
  • Preparation method and application of a nitrogen-doped carbon material catalyst
  • Preparation method and application of a nitrogen-doped carbon material catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take a certain amount of melanin and dissolve it in 16mL of absolute ethanol, then add 0.1806g of carbon nanotubes with a diameter of <8nm to ensure that the mass fraction of nitrogen is 6wt%, stir the mixture at 60°C for 5h, then cool to room temperature , centrifuge to remove the supernatant, fully dry the precipitate under vacuum condition at 60°C, completely remove the solvent, then grind it into powder, calcinate in 800°C nitrogen atmosphere for 2h, and cool to room temperature to obtain nitrogen-doped carbon material catalyst.

Embodiment 2

[0033] On the basis of Example 1, after adding melanin and carbon nanotubes into ethanol, the mixture was fully stirred at 70° C. for 5 hours, and the rest of the preparation steps were the same as in Example 1.

Embodiment 3

[0035] On the basis of Example 1, after adding melanin and carbon nanotubes into ethanol, the mixture was fully stirred at 60° C. for 10 h, and the rest of the preparation steps were the same as in Example 1.

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Abstract

The invention provides a method for preparing a nitrogen-doped carbon material catalyst, comprising the following steps: A, adding a nitrogen-containing compound and a carbon material into ethanol respectively, and stirring for 5-20 hours at a temperature range of 0-70°C; B. 1. Separating the liquid obtained in step A into solid-liquid, and drying the separated solid; C. Grinding the dried solid obtained in step B, and calcining it under an inert atmosphere to obtain a nitrogen-doped carbon material catalyst. The catalyst described in the invention can efficiently and selectively catalyze the hydrogenation of aromatic compounds under mild conditions, reduce the amount of metal used, reduce the cost of the catalyst, improve catalyst activity, stability and hydrogenation selectivity, and also have good electrocatalytic performance .

Description

technical field [0001] The invention belongs to the technical field of non-metallic catalysts, and in particular relates to a preparation method and application of a nitrogen-doped carbon material catalyst. Background technique [0002] Aromatic amine compounds are important raw materials for the production of pharmaceuticals, pesticides, dyes, rubber additives, photosensitive materials and petroleum solvents and other chemical products. Aromatic amine compounds are mainly prepared by catalytic hydrogenation of aromatic nitro compounds. Therefore, a New metal-free catalysts that can efficiently catalyze the hydrogenation of aromatic nitro compounds under mild conditions are of great significance. In the past, hydrogenation catalysts often used supported noble metal catalysts, which had good catalytic effect, but the cost was high. At the same time, supported catalysts also had problems such as uneven dispersion of active metals, large particle size, and small metal surface a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C07C213/02C07C215/76C07C209/36C07C211/52C07D215/40C07C221/00C07C223/06C07C225/22C07C227/04C07C229/60C07C231/12C07C237/30C07C217/84C07D285/14C07C253/30C07C255/58H01M4/90
CPCB01J27/24C07C209/365C07C213/02C07C221/00C07C227/04C07C231/12C07C253/30C07D215/40C07D285/14H01M4/9083C07C215/76C07C211/52C07C223/06C07C225/22C07C229/60C07C237/30C07C217/84C07C255/58Y02E60/50
Inventor 李国柱张香文王涖
Owner TIANJIN UNIV
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