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Preparation for nitrogen-doped carbon anode and application of nitrogen-doped carbon anode in catalysis of wet air oxidation

A nitrogen-doped carbon and nitrogen-doped technology, applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, water pollutants, etc., to achieve high catalytic activity and avoid secondary pollution.

Active Publication Date: 2019-09-20
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, it still requires an operating temperature above 80°C and an operating pressure above 0.5MPa (Zhang et al., Sci.Rep.2014, 4, 6797)

Method used

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  • Preparation for nitrogen-doped carbon anode and application of nitrogen-doped carbon anode in catalysis of wet air oxidation
  • Preparation for nitrogen-doped carbon anode and application of nitrogen-doped carbon anode in catalysis of wet air oxidation
  • Preparation for nitrogen-doped carbon anode and application of nitrogen-doped carbon anode in catalysis of wet air oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 2.0g of ethylenediaminetetraacetic acid disodium salt to 30mL of deionized water, dissolve to form a transparent solution, transfer to a 50mL hydrothermal reactor, and then immerse 0.4g of carbon felt treated with hydrogen oxide in the solution. React at 160℃ for 14h; after cooling, take out the carbon felt, wash three times alternately with deionized water and absolute ethanol, and dry it in an oven at 80℃ for 12h; then put the dried carbon felt in a tube furnace with nitrogen Heat treatment at 700℃ for 1h under protection to obtain nitrogen-doped carbon felt material.

[0027] In a single-chamber three-electrode system, under normal temperature and pressure, the prepared nitrogen-doped carbon felt material is used as the anode, platinum wire is the counter electrode, and the calomel electrode is the reference electrode, with 0.05 mol·L -1 Na 2 SO 4 As electrolyte, pH is 7.0, 30mL·s -1 Air is blown from the bottom of the reactor at a flow rate, and the concentration of...

Embodiment 2

[0029] Add 5.0g of ethylenediaminetetraacetic acid disodium salt to 30mL of deionized water, dissolve to form a transparent solution, transfer to a 50mL hydrothermal reactor, and then immerse 0.4g of carbon felt treated with hydrogen oxide in the solution. React at 200℃ for 8h; after cooling, take out the carbon felt, wash three times alternately with deionized water and absolute ethanol, and dry it in an oven at 80℃ for 12h; then put the dried carbon felt into a tube furnace with nitrogen Heat treatment at 300°C for 5h under protection to obtain nitrogen-doped carbon felt material.

[0030] In a single-chamber three-electrode system, under normal temperature and pressure, the prepared nitrogen-doped carbon felt material is used as the anode, platinum wire is the counter electrode, and the calomel electrode is the reference electrode, with 0.05 mol·L -1 Na 2 SO 4 As electrolyte, pH 3.0, 30mL·s -1 Air is blown from the bottom of the reactor at a flow rate, and the concentration of ...

Embodiment 3

[0032] Add 1.0g of ethylenediaminetetraacetic acid disodium salt to 30mL of deionized water, dissolve it to form a transparent solution and transfer it to a 50mL hydrothermal reactor, and then immerse 0.4g of carbon fiber treated with hydrogen oxide in the solution. React at 120℃ for 24h; after cooling, take out the carbon fiber, wash three times alternately with deionized water and absolute ethanol, and dry it in an oven at 80℃ for 12h; then put the dried carbon felt in a tube furnace under nitrogen protection Heat treatment at 900°C for 1h to obtain nitrogen-doped carbon fiber material.

[0033] In the single-chamber three-electrode system, the prepared nitrogen-doped carbon fiber material is used as the anode, the platinum wire is the counter electrode, and the calomel electrode is the reference electrode under normal temperature and pressure. -1 Na 2 SO 4 As electrolyte, pH 5.0, 30mL·s -1 Air is blown from the bottom of the reactor at a flow rate, and the concentration of cata...

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Abstract

The invention discloses a preparation for a nitrogen-doped carbon anode and an application of the nitrogen-doped carbon anode in catalysis of wet air oxidation. The nitrogen-doped carbon anode is prepared through the following steps: with an ordinary three-dimensional carbon material as a substrate and EDTA as a nitrogen source, subjecting the ordinary three-dimensional carbon material and the EDTA to a hydrothermal nitrogen doping reaction at a certain temperature; and carrying out cooling, then taking out the carbon material, carrying out washing and drying, placing the carbon material into a tubular furnace, and carrying out heat treatment in a nitrogen atmosphere so as to obtain a nitrogen-doped carbon material. According to the invention, at a normal temperature and a normal pressure and in a single-chamber three-electrode system, with the prepared nitrogen-doped carbon material as a battery anode, a platinum wire as a counter electrode, a calomel electrode as a reference electrode and Na2SO4 with a concentration of 0.05 mol.L<-1> at a voltage of 1.0 V as an electrolyte, air is catalyzed to oxidize dry wastewater under the condition of certain pH, and a variety of dyes with a certain concentration can be completely removed in 2 h.

Description

Technical field [0001] The invention relates to the preparation and application of an electrically-assisted catalytic wet air oxidation catalyst, in particular to the preparation of a nitrogen-doped carbon material anode and its application in the catalytic wet air oxidation. Background technique [0002] Nitrogen atoms have similar radii to carbon atoms, so they have good compatibility with carbon materials, are easy to dope into the carbon lattice, and have high stability and durability. In addition, the generated NC bond can make the carbon atom adjacent to the nitrogen atom have more positive charges, and the enhancement of electron adsorption will create better conditions for the catalytic redox reaction. These characteristics also make nitrogen doping widely used in Various catalytic fields. Solvothermal or hydrothermal methods are currently common methods for nitrogen-doping modification of carbon materials due to their mild conditions, easy operation, and suitable for la...

Claims

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Application Information

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IPC IPC(8): C02F1/74C02F1/72C02F101/38
CPCC02F1/725C02F1/74C02F2101/308C02F2101/38
Inventor 翟林峰郭贺友孙敏张锋
Owner HEFEI UNIV OF TECH
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