Carbon cloth loaded nitrogen-doped graphene material as well as preparation method and application thereof

A technology of nitrogen-doped graphene and carbon cloth, applied in chemical instruments and methods, catalyst activation/preparation, water/sludge/sewage treatment, etc., can solve the problems of low catalytic efficiency, insufficient stability, and catalyst recyclability and other problems, to achieve excellent catalytic activity, improve electron transfer ability, and facilitate the effect of catalytic degradation performance

Active Publication Date: 2020-12-22
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a carbon cloth-loaded nitrogen-doped graphene material and its preparation method and application, which solves the problems of existing catalysts such as difficulty in recycling, insufficient stability and low catalytic efficiency

Method used

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  • Carbon cloth loaded nitrogen-doped graphene material as well as preparation method and application thereof
  • Carbon cloth loaded nitrogen-doped graphene material as well as preparation method and application thereof
  • Carbon cloth loaded nitrogen-doped graphene material as well as preparation method and application thereof

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preparation example Construction

[0030] The invention discloses a method for preparing a carbon cloth-supported nitrogen-doped graphene material, which comprises the following steps:

[0031] (1) First disperse the nitrogen source into an organic solvent, then add non-noble metal-MOF nanoparticles as a precursor, and stir and mix at 60°C to obtain a composite dispersion; wherein, the mass of the nitrogen source and the non-noble metal-MOF The ratio is (1~20):1;

[0032] (2) Then, the composite dispersion liquid is added dropwise on the acidified carbon cloth, and after pyrolysis, the carbon cloth supported nitrogen-doped graphene material is obtained.

[0033] Specifically, the nitrogen source is one or two or more of urea, dicyandiamide, melamine, acetonitrile and polyaniline.

[0034] Specifically, the organic solvent is one or two or more of methanol, ethanol, isopropanol, ethylene glycol, polyethylene glycol, and the like.

[0035] Specifically, the non-noble metal-MOF is one or more of MOF-5 (Zn), ZIF-...

Embodiment 1

[0037] The invention discloses a method for preparing a carbon cloth-supported nitrogen-doped graphene material, which comprises the following steps:

[0038] (1) Dissolve 5.231g of dicyandiamide in 167mL of ethanol, stir and heat to dissolve at 60°C, then add 0.5231g of MIL-101(Fe), that is, the mass ratio of nitrogen source to MOF is 10:1; after uniform stirring for 4 hours A light orange solution was obtained, namely MIL-101(Fe) / dicyandiamide composite dispersion.

[0039] (2) Concentrate the carbon cloth with acid and 2.5g KMnO at 50°C 4 After soaking in the solution for 5 min, washing and drying, the treated carbon cloth was obtained. Wherein concentrated mixed acid is the concentrated phosphoric acid of 5ml and the concentrated hydrochloric acid of 45ml.

[0040] (3) Add the dispersion of MIL-101(Fe) / dicyandiamide compound dropwise onto the treated carbon cloth. After the MIL-101(Fe) / dicyandiamide compound is loaded on the carbon cloth, place Pyrolysis in the quartz b...

Embodiment 2

[0042] The invention discloses a method for preparing a carbon cloth-supported nitrogen-doped graphene material, which comprises the following steps:

[0043] (1) Dissolve 7.068g of dicyandiamide in 226mL of ethylene glycol, stir and heat to dissolve at 60°C, then add 0.3534g of MOF-5(Zn), that is, the mass ratio of nitrogen source to MOF is 20:1; stir evenly for 4 After hours, a white solution was obtained, that is, the MOF-5(Zn) / dicyandiamide composite dispersion.

[0044] (2) Concentrate the carbon cloth with acid and 2.5g KMnO at 50°C 4 After soaking in the solution for 5 min, washing and drying, the treated carbon cloth was obtained. Wherein the concentrated mixed acid is the concentrated phosphoric acid of 5ml and the concentrated nitric acid of 45ml.

[0045](3) Add the MOF-5(Zn) / dicyandiamide composite dispersion dropwise onto the treated carbon cloth, and the MIL-101(Fe) / dicyandiamide composite is loaded on the carbon cloth and placed in a tube furnace Pyrolysis in...

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Abstract

The invention belongs to the technical field of solid catalysts for activating persulfate, and particularly discloses a preparation method of a carbon cloth loaded nitrogen-doped graphene material, which comprises the following steps of (1) dispersing a nitrogen source into an organic solvent, adding non-noble metal-MOF nanoparticles as a precursor, and stirring and mixing at 60 DEG C to obtain acompound dispersion liquid, wherein the mass ratio of the nitrogen source to the non-noble metal-MOF is (1-20): 1, and (2) dropwise adding the compound dispersion liquid onto the acidified carbon cloth, and pyrolyzing to obtain the carbon cloth loaded nitrogen-doped graphene material. According to the preparation method, sacrificial elements and noble metals are not adopted, carbon cloth is takenas a substrate, and a self-assembled compound of non-noble metal MOF and a nitrogen source is pyrolyzed, so that the active nitrogen component in the catalyst is improved, the catalytic degradation performance is improved, and the material has good catalytic activity and stability. The invention also discloses an application of the material as a catalyst for activating persulfate.

Description

technical field [0001] The invention belongs to the technical field of solid catalysts for activating persulfates, and in particular relates to a carbon cloth-supported nitrogen-doped graphene material and a preparation method and application thereof. Background technique [0002] Advanced oxidation technology is a new type of technology developed in recent years for the treatment of refractory organic pollutants. It has the advantages of short cycle, quick effect, low cost, and good treatment effect. It has become a research topic in the field of medical wastewater treatment at home and abroad. Hotspots and Frontiers. In particular, compared with traditional advanced oxidation technologies such as Fenton’s method, activated persulfate advanced oxidation technology has the advantages of strong stability, good solubility, wide applicable pH range and long life of sulfate radicals, which is more conducive to high Degradation of concentrated organic pollutants. [0003] Under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/06B01J37/08C02F1/72C02F101/30
CPCB01J27/24B01J35/0033B01J35/06B01J37/086C02F1/725C02F2101/308
Inventor 杨丽梦
Owner XI'AN POLYTECHNIC UNIVERSITY
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