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Preparation method of graphite carbon coated iron-nitrogen-carbon solid-phase Fenton catalyst and its application

A catalyst, graphitic carbon technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of decomposing action to be studied, high cost, and achieve the promotion of decomposing action, excellent performance, synthesis simple steps

Active Publication Date: 2019-11-08
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently, reported graphitic carbon-wrapped Fe 3 Most of the synthesis methods of C catalysts are compounded by graphene, carbon nanotubes and iron phthalocyanine and processed through a series of complicated steps, and the cost is relatively high
[0007] Catalyst synthesis methods with iron-nitrogen active sites or the coexistence of iron-nitrogen species and carbon-iron species need to be further developed. 2 o 2 The role of decomposition remains to be studied

Method used

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  • Preparation method of graphite carbon coated iron-nitrogen-carbon solid-phase Fenton catalyst and its application
  • Preparation method of graphite carbon coated iron-nitrogen-carbon solid-phase Fenton catalyst and its application
  • Preparation method of graphite carbon coated iron-nitrogen-carbon solid-phase Fenton catalyst and its application

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Embodiment 1

[0044] A graphite carbon-wrapped iron-nitrogen-carbon solid-phase Fenton catalyst, the preparation method of which is as follows:

[0045] 1) Mix 3g of glucose and 8g of urea (the molar ratio of carbon source to nitrogen source is 1:8), heat and melt at 150°C until clarified, then add 3.03g of ferric nitrate nonahydrate and stir until completely dissolved, transfer to Dry in an oven at 180°C for 12h, and then calcined at 750°C for 2h under the protection of nitrogen atmosphere to obtain a graphite carbon-wrapped iron-nitrogen-carbon solid-phase Fenton catalyst. The mass fraction of Fe in the synthesized catalyst is 35%, labeled as FeNC@C-35.

Embodiment 2

[0047] A graphite carbon-wrapped iron-nitrogen-carbon solid-phase Fenton catalyst, the preparation method of which is as follows:

[0048] Mix 3g of glucose and 5g of urea (the molar ratio of carbon source to nitrogen source is 1:5), heat and melt at 150°C until clarified, then add 1.73g of ferric nitrate nonahydrate and stir until completely dissolved, then transfer to 180°C Drying in an oven for 12 hours, followed by calcining at 750°C for 2 hours under the protection of a nitrogen atmosphere to obtain a graphite carbon-wrapped iron-nitrogen-carbon solid-phase Fenton catalyst, the mass fraction of Fe in the synthesized catalyst is 20% , labeled as FeNC@C-20.

Embodiment 3

[0050] A graphite carbon-wrapped iron-nitrogen-carbon solid-phase Fenton catalyst, the preparation method of which is as follows:

[0051] Mix 3g of glucose with 11g of urea (the molar ratio of carbon source to nitrogen source is 1:11), heat and melt at 150°C until clarified, then add 4.32g of ferric nitrate nonahydrate and stir until completely dissolved, then transfer to 180 ℃ in an oven for 24 hours, and then under the protection of nitrogen atmosphere, calcined at 750 ℃ ​​for 2 hours to obtain the iron-nitrogen-carbon solid-phase Fenton catalyst wrapped in graphite carbon. The mass fraction of Fe element in the synthesized catalyst is 50 %, marked as FeNC@C-50.

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Abstract

The invention relates to the technical field of preparing solid-phase Fenton catalyst, in particular to a preparation method of graphite carbon coated iron-nitrogen-carbon solid fenton catalyst and its application in organic wastewater treatment. The preparation method of the catalyst comprises the following steps: after mixing and melting the carbon source and the nitrogen source in a certain proportion, adding a certain proportion of iron source, fully stirring and dissolving the mixture, transferring the mixture to an oven at 150-180 DEG C for drying for 12-24 hours, and calcining under theprotection of nitrogen atmosphere to obtain the catalyst. The catalyst prepared by the invention is a graphite carbon coated FeN and Fe3C coexisting iron-nitrogen-carbon catalyst, the size of the nanoparticles is 5-30nm, the specific surface area of the catalyst is 80-300m2 / g, and the FeN is the main active site for decomposing hydrogen peroxide. The catalyst of the present invention can be applied to electric-Fenton and Fenton systems and an organic wastewater with pH range of 3-9 is treated. The preparation method of the invention has the advantages of simple steps, easy availability of rawmaterials, excellent performance, high stability and recyclability.

Description

technical field [0001] The invention relates to the technical field of preparation of solid-phase Fenton catalysts, in particular to a preparation method of graphite carbon-wrapped iron-nitrogen-carbon solid-phase Fenton catalysts and its application in treating organic wastewater. Background technique [0002] Fenton reaction (Fenton reaction), as an advanced oxidation technology, mainly refers to the use of Fe 2+ catalytic decomposition of H 2 o 2 , the process of generating a highly oxidative free radical product·OH (2.8eV), as shown in formula (1). Fe 2+ and H 2 o 2 Called Fenton's reagent. [0003] Fe 2+ +H 2 o 2 +H + → Fe 3+ +H 2 O+ OH (1) [0004] The Fenton method has been widely studied because it can generate a large amount of highly active OH and can efficiently degrade and treat organic wastewater. At present, the common Fenton methods include electric-Fenton, photo-Fenton, homogeneous-phase Fenton and solid-phase Fenton. In general, these methods c...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/72C02F101/30
CPCB01J27/24C02F1/722C02F2101/30Y02W10/37
Inventor 胡晶晶孙杰余佳棋雷炜东李金林张煜华
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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