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Preparation method of nitrogen-sulfur co-doped graphene-like porous sheet layer embedded with iron carbide

A nitrogen-sulfur co-doping, graphene technology, applied in chemical instruments and methods, chemical/physical processes, oxidized water/sewage treatment, etc. Surface area, reduce secondary pollution, enhance the effect of conductivity

Inactive Publication Date: 2021-05-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of graphene is complicated, the cost is high, and in the absence of doping, the carbonization temperature of carbon-based materials to obtain graphene structure is relatively high, the degree of activation of persulfate is limited, and material recovery is also difficult.
[0004] Graphene-like materials have an ultra-thin two-dimensional structure with atomic-level thickness and infinite planar expansion, similar to graphene layered structure, which can activate persulfate to degrade organic pollutants in water, but the traditional method of preparing graphene-like materials Complicated, and the resulting graphene-like materials have limited effectiveness in removing organic pollutants

Method used

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  • Preparation method of nitrogen-sulfur co-doped graphene-like porous sheet layer embedded with iron carbide
  • Preparation method of nitrogen-sulfur co-doped graphene-like porous sheet layer embedded with iron carbide
  • Preparation method of nitrogen-sulfur co-doped graphene-like porous sheet layer embedded with iron carbide

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Experimental program
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Embodiment 1

[0030] This embodiment provides a method for preparing a nitrogen-sulfur co-doped graphene-like porous sheet (FeC@SCN-0.5-1-6) embedded with iron carbide, comprising the following steps:

[0031] Step 1, take by weighing 0.5g of Fe(NO 3 ) 3 9H 2 O and 1 g of methionine were dissolved in 40 mL of deionized water, and after stirring for 30 min, 6 g of melamine was added, and 40 mL of absolute ethanol was added, and stirred for 30 min to obtain a suspension;

[0032] Step 2. Transfer the suspension obtained in step 1 to a 250mL three-necked flask, stir in a water bath at 80°C for 4 hours to evaporate the solvent, and then put the obtained solid in an oven at 80°C for drying, and grind to obtain the precursor body;

[0033] Step 3. Place the precursor obtained in step 2 in a tube furnace, and carry out two-step carbonization under the protection of nitrogen. First, heat up to 500°C for 2 hours at a heating rate of 2°C / min, and then carbonize at a heating rate of 2°C / min. Heat ...

Embodiment 2

[0035] This example provides a method for preparing a nitrogen-sulfur co-doped graphene-like porous sheet (FeC@SCN-0.5-1-4) embedded with iron carbide. Compared with Example 1, the only difference is the addition of 6g of melamine is adjusted to add 4g of melamine; other steps remain unchanged. Finally, a nitrogen-sulfur co-doped graphene-like porous sheet embedded with iron carbide (FeC@SCN-0.5-1-4) was obtained.

Embodiment 3

[0037] This example provides a method for preparing a nitrogen-sulfur co-doped graphene-like porous sheet (FeC@SCN-0.5-1-2) embedded with iron carbide. Compared with Example 1, the only difference lies in the addition of 6g of melamine is adjusted to add 2g of melamine; other steps remain unchanged. Finally, a nitrogen-sulfur co-doped graphene-like porous sheet embedded with iron carbide (FeC@SCN-0.5-1-2) was obtained.

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Abstract

The invention provides a preparation method of an iron carbide embedded nitrogen-sulfur co-doped graphene-like porous sheet layer, and belongs to the technical field of water treatment. The preparation method specifically comprises the following steps: 1) adding ferric salt and a sulfur source into deionized water, uniformly stirring, adding a nitrogen source and absolute ethyl alcohol, and uniformly stirring to obtain a suspension; wherein the mass ratio of the ferric salt to the sulfur source to the nitrogen source is (0.3-1): (0.2-2): (2-12), and the mass fraction of the ferric salt is 3.75-12.5%; 2) evaporating a solvent in the turbid liquid to obtain a precursor; and 3) heating the precursor in nitrogen to 500 DEG C, carbonizing for 2-4 hours, heating to 800 DEG C, carbonizing for 2-5 hours, cooling, pickling, washing to be neutral, drying, and grinding to obtain the material. The material obtained by the invention can improve the problem that the current carbon material is difficult to recover in the water body, reduces the secondary pollution caused by metal dissolution, and has excellent capability of removing organic pollutants in the water.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for preparing a nitrogen-sulfur co-doped graphene-like porous sheet embedded with iron carbide. Background technique [0002] With the rapid development of industry, the pollution of water quality is also increasing. More and more organic pollutants enter the water body, which not only damages the surrounding environment, but also seriously affects the health of surrounding animals and humans. At present, the advanced oxidation technology of activating persulfate is extremely effective in removing refractory organic pollutants in water. [0003] Peroxymonosulfate can generate free radicals with super oxidizing ability under the action of catalyst. The catalytic process of the homogeneous system with transition metal ions as the main catalyst is simple and easy, but the recovery is difficult, and in order to prevent the precipitation of metal ions, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/02B01J35/10C02F1/72C02F101/30B01J35/00
CPCB01J27/24C02F1/725C02F2101/30B01J35/33B01J35/00B01J35/30B01J35/60
Inventor 陈文瑾何东东黄金何红梅雷乐乐慎雅倩
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA