A kind of porous fe/c/n composite material and preparation method thereof

A composite material and powder technology, which is applied in the field of porous Fe/C/N composite material and its preparation, can solve the problems of secondary pollution pollutant adsorption capacity, low iron regeneration efficiency on the catalyst, and uneven distribution of catalytic sites. Achieve efficient and stable heterogeneous electro-Fenton catalytic performance, high utilization rate, and good product performance reproducibility

Active Publication Date: 2022-04-29
SUZHOU INST FOR ADVANCED STUDY USTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing heterogeneous Fenton catalysts still have some defects: (1) the catalytic sites are not evenly distributed on the support; (2) the catalyst is prone to agglomeration during use; (3) the regeneration efficiency of iron on the catalyst is low ; (4) the H produced by the catalyst and the cathode 2 o 2 Mass transfer resistance between
However, this kind of material still has the disadvantages of secondary pollution caused by metal dissolution or insufficient adsorption capacity of pollutants, which limits its practical application.

Method used

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  • A kind of porous fe/c/n composite material and preparation method thereof
  • A kind of porous fe/c/n composite material and preparation method thereof
  • A kind of porous fe/c/n composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation method of Fe / C / N porous composite material

[0044] (1) Synthesis of precursor MIL-100(Fe):

[0045] First, accurately weigh 277.5mg of reduced iron powder, 687.5mg of 1,3,5-trimellitic acid (H 3 BTC), mixed with 200 μL of hydrofluoric acid (40 wt%), 190 μL of nitric acid (65 wt%), and 20 mL of deionized water, and continuously stirred at a speed of 500 rpm for 30 min. The above mixed solution was transferred to a polytetrafluoroethylene reactor liner with a volume of 50mL, the cap was screwed on tightly, and the reaction was carried out by hydrothermal reaction at 150°C for 24h. Cool naturally to room temperature after the reaction is complete, centrifuge the reaction product, transfer the centrifuged product to a clean beaker, add about 250 mL of deionized water, and put it in an oil bath at 80°C for 3 hours to remove residual H 3 BTC. After the oil bath is completed, centrifuge, and wash the centrifuged product several times with deionized water and ab...

Embodiment 2

[0051] The catalytic performance test of embodiment 2.Fe / C / N composite material

[0052] Weigh 10 mg of Fe / C / N porous material, mix it with 2.45 mL of isopropanol and 50 μL of Nafion solution in a sealed glass weighing bottle, and ultrasonicate for 60 min to obtain a uniformly dispersed ink solution. Use a pipette gun to evenly drop the ink solution to an area of ​​6cm 2 Carbon paper electrodes were air-dried at room temperature to prepare carbon paper electrodes loaded with Fe / C / N porous materials.

[0053] The catalytic degradation experiment was carried out at room temperature, using platinum wire as the counter electrode, Ag / AgCl electrode as the reference electrode, and carbon paper electrode loaded with Fe / C / N porous material as the working electrode, connected to the electrochemical workstation to form a three-electrode system . 10mg·L -1 BPA solution was used as simulated wastewater, adding 0.05mol·L -1 Anhydrous Na 2 SO 4 Adjust its pH to 3.0 as a supporting ele...

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Abstract

The invention relates to the field of material technology. The invention provides an efficient, stable and environmentally friendly porous iron-carbon composite material as an electro-Fenton cathode to improve the pollutant degradation efficiency and sustainability of the electro-Fenton system. The material uses the iron-based metal skeleton organic compound MIL-(100)Fe as the precursor, polyaniline (PANI) as the carbon source and nitrogen source, and obtains the Fe / C / N porous composite material through high-temperature carbonization. The Fe / C / N composite material of the present invention has efficient and stable heterogeneous electro-Fenton catalytic properties. In practical applications, the material has oxygen reduction and Fenton catalysis, and can generate H 2 o 2 Simultaneously catalyzed H 2 o 2 Generate OH without adding other reagents or catalysts.

Description

technical field [0001] The invention relates to the technical field of materials, and more specifically relates to a porous Fe / C / N composite material and a preparation method thereof. Background technique [0002] Advanced oxidation processes (AOPs), also known as deep oxidation methods, use oxidants, catalysts, light, electric ultrasound and other technologies to produce a large number of highly oxidative oxidation active substances (such as OH, etc.) in the reaction, through The reaction of oxidative active substances and organic pollutants, the sewage treatment process of rapid mineralization of refractory organic pollutants, is often used in the pretreatment or advanced treatment of sewage. [0003] Electro-Fenton technology (Enric Brillas, I.S.s., and Mehmet A.Oturan, Electro-Fenton Process and Related Electrochemical Technologies Based on Fenton's Reaction Chemistry. Chem. Rev. 2009, 109, 6570-6631) is a kind of advanced oxidation technology, its core is to use the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90
CPCC02F1/4672C02F1/725C02F2305/026
Inventor 李文卫陆家缘胡晓柳后起
Owner SUZHOU INST FOR ADVANCED STUDY USTC
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