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Nitrogen-doped layered nano carbon catalyst as well as preparation and application thereof

A layered nano-carbon catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as secondary pollution, and achieve low cost, convenient operation, and simple preparation process. Effect

Active Publication Date: 2019-06-11
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problem of secondary pollution caused by the dissolution of existing metal catalysts in the catalytic ozonation system, the present invention provides a non-metallic catalyst that catalyzes the oxidation of ozone to degrade organic pollutants

Method used

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  • Nitrogen-doped layered nano carbon catalyst as well as preparation and application thereof
  • Nitrogen-doped layered nano carbon catalyst as well as preparation and application thereof
  • Nitrogen-doped layered nano carbon catalyst as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Disperse 1g of β-cyclodextrin and 1g of melamine in 80mL of water and 40mL of methanol, and disperse them by ultrasonication for 30min;

[0052] (2) Stir the mixed solution dispersed in step (1) on a magnetic stirrer at 80° C. at a speed of 300 r / min overnight;

[0053] (3) Put the solid mixture that was stirred and evaporated in step (2) in a quartz boat and put it into a tube furnace; roast it under the condition that the inert atmosphere is argon, and the roasting program is: with a speed of 5° C. / min Heated to 600°C and kept at 600°C for 4h, then the sample was heated to 800°C at 2°C / min and kept for 3h to obtain a nitrogen-doped layered nanocarbon material named N1C-800, Ar.

Embodiment 2

[0055] (1) Disperse 1g of β-cyclodextrin and 1g of melamine in 80mL of water and 40mL of methanol, and disperse them by ultrasonication for 30min;

[0056] (2) Stir the mixed solution dispersed in step (1) on a magnetic stirrer at 80° C. at a speed of 300 r / min overnight;

[0057] (3) Put the solid mixture that was stirred and evaporated in step (2) in a quartz boat and put it into a tube furnace; roast it under the condition that the inert atmosphere is argon, and the roasting program is: with a speed of 5° C. / min Heated to 600°C and kept at 600°C for 4h, then the sample was heated to 1100°C at 2°C / min and kept for 3h to obtain a nitrogen-doped layered carbon nanomaterial named N1C-1100, Ar.

Embodiment 3

[0059] (1) Disperse 1g of β-cyclodextrin and 3g of melamine in 80mL of water and 40mL of methanol, and disperse them by ultrasonication for 30min;

[0060] (2) Stir the mixed solution dispersed in step (1) on a magnetic stirrer at 80° C. at a speed of 300 r / min overnight;

[0061] (3) Put the solid mixture that was stirred and evaporated in step (2) in a quartz boat and put it into a tube furnace; roast it under the condition that the inert atmosphere is argon, and the roasting program is: with a speed of 5° C. / min Heated to 600°C and kept at 600°C for 4h, then the sample was heated to 800°C at 2°C / min and kept for 3h to obtain a nitrogen-doped layered nanocarbon material named N3C-800, Ar.

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Abstract

The invention discloses a nitrogen-doped layered nano carbon catalyst as well as preparation and application thereof. The catalyst has a layered nanostructure and is formed by heating beta-cyclodextrin and melamine at a high temperature, wherein the beta-cyclodextrin is used as a carbon source and the melamine is used as a nitrogen source, non-metallic raw materials are used as raw materials of the catalyst, compared with other catalysts, the catalyst provided by the invention has lower costs, a simpler preparation process, convenient operation, and broader application prospects in catalysis of degradation of macromolecular organic pollutants in wastewater in petrochemical industry by ozone in a catalysis ozone oxidation system; when the usage amount of the catalyst is 0.1 g / L and the concentration of the ozone is 25 ppm, oxalic acid with resistance to the ozone can be completely degraded within 45 min, p-nitrophenol widely detected in petrochemical and pharmaceutical wastewater can becompletely degraded within 45 min, and the removal rate of total organic carbon (TOC) can be significantly improved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment. It specifically relates to a nitrogen-doped layered nano-carbon catalyst and its preparation and application. Background technique [0002] In recent years, with the rapid development of industrialization, the total amount of wastewater discharge has increased year by year, and the problem of water environmental pollution has become increasingly serious, and refining wastewater is the main source of industrial wastewater. Studies have found that in addition to conventional pollutants such as petroleum, COD, ammonia nitrogen, sulfur, phenol, and cyanide, refining wastewater also contains some trace organic pollutants that are difficult to biodegrade, mainly including naphthenic acids, lipids, etc. Such pollutants generally have aromatic rings, condensed rings and heterocyclic rings in their molecular structures. The pollutants themselves have carcinogenic, teratogenic and mutagenic e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/78C02F101/30C02F101/32C02F101/34C02F103/36
Inventor 王郁现席佳欣陈春茂王庆宏
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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