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A method for microwave-induced strengthening of iron-modified nitrogen-doped carbon-based materials for degradation of dyes and pesticides

A nitrogen-doped carbon and carbon-based material technology, applied in the field of environmental organic pollutant remediation, can solve the problems of reducing microwave energy utilization rate and pollutant degradation rate, weakening the non-thermal effect of microwave, etc., achieving good dispersion, promoting shedding, The effect of fast reaction rate

Active Publication Date: 2021-10-22
NANKAI UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] Carbon-based materials have the characteristics of acid resistance, alkali resistance, high temperature and high pressure resistance, etc. The combination of carbon-based materials and electromagnetic waves will convert electromagnetic wave absorption into heat energy and dissipate it. If the heat dissipation is too much, it will lead to non-target dissipation of microwave energy, weakening the The non-thermal effect of microwave, thereby reducing the utilization rate of microwave energy and the degradation rate of pollutants

Method used

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  • A method for microwave-induced strengthening of iron-modified nitrogen-doped carbon-based materials for degradation of dyes and pesticides
  • A method for microwave-induced strengthening of iron-modified nitrogen-doped carbon-based materials for degradation of dyes and pesticides
  • A method for microwave-induced strengthening of iron-modified nitrogen-doped carbon-based materials for degradation of dyes and pesticides

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Experimental program
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Embodiment 1

[0038] Step 1: Synthesis of nitrogen-doped carbon-based materials

[0039] Using redox graphene carbon as the carbon-based material, 1 g of the carbon-based material was added to 200 ml of water, and then 1 g of melamine was added to form a mixed solution after 24 hours of adsorption equilibrium. Suction filtered and freeze-dried for later use. The resulting black mixture was transferred to an atmosphere furnace, and heated in a static state at 400° C. with nitrogen for 40 minutes at a heating rate of 5° C. / min. Then, the obtained black powder was washed three times with ethanol and deionized water, then suction-filtered, and freeze-dried for 24 h for further use.

[0040] Step 2: Preparation of iron-modified nitrogen-doped carbon-based materials

[0041] Place 1g / 200mL of the nitrogen-doped carbon-based material suspension prepared above in a three-necked flask, and fill 15g of FeSO 4 ·7H 2 O was added to the suspension and stirred for 12 hours to reach adsorption equilib...

Embodiment 2

[0045]Step 1: Synthesis of nitrogen-doped carbon-based materials

[0046] Using redox graphene carbon as the carbon-based material, add 1 g of the carbon-based material to 200 ml of water, then add 1 g of melamine, and form a mixed solution after 24 hours of adsorption equilibrium. Suction filtered and freeze-dried for later use. The resulting black mixture was transferred to an atmosphere furnace, and heated in a static state at 400° C. with nitrogen for 40 minutes at a heating rate of 5° C. / min. Then, the obtained black powder was washed three times with ethanol and deionized water, then suction-filtered, and freeze-dried for 24 h for further use.

[0047] Step 2: Preparation of iron-modified nitrogen-doped carbon-based materials

[0048] Place 2g / 200mL of the nitrogen-doped carbon-based material suspension prepared above in a three-necked flask, and fill 10g of FeSO 4 ·7H 2 O was added to the suspension and stirred for 12 hours to reach adsorption equilibrium, and 10g / 1...

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Abstract

The invention discloses a method for microwave-induced strengthening of iron-modified nitrogen-doped carbon-based materials to degrade dyes and pesticides. The nitrogen-doped carbon-iron composite material obtained by the method of the invention has a three-dimensional structure, and the zero-valent iron particles are nanometer Level, uniform distribution, high catalytic activity, the degradation reaction is mainly induced by the thermal effect generated by microwave radiation and non-thermal effects such as electricity, magnetism and chemistry to strengthen iron-modified nitrogen-doped carbon-based materials to degrade high-concentration organic pollutants and improve the absorption of microwave energy And the utilization rate of zero-valent iron, the dyes and pesticides will be quickly degraded. The microwave-coupled iron-modified nitrogen-doped carbon-based material method of the present invention has fast reaction rate, high efficiency, easy recovery after use, no secondary pollution, and has the characteristics of simplicity, economy and strong operability.

Description

[0001] Application field [0002] The invention belongs to the technical field of environmental organic pollutant remediation, and in particular relates to a microwave-induced strengthening method for efficiently degrading dyes and pesticides by iron-modified nitrogen-doped carbon-based materials. Background technique [0003] With the rapid development of chemical, food and other industries, the types and quantities of refractory organic wastewater are on the rise, with high toxicity, complex components, and difficult biodegradation. At present, the commonly used treatment methods include adsorption method, incineration method, concentration method, electrocatalytic oxidation treatment, membrane technology treatment and the combination of the above methods, etc., but there are problems such as high treatment cost, complicated process, and difficult equipment maintenance. Microwave water treatment technology is an emerging water pollution control technology. It uses the therma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30B01J27/24B01J37/32B01J37/16C02F101/30C02F101/34C02F101/38
CPCB01J27/24B01J35/0033B01J37/16B01J37/32C02F1/302C02F2101/306C02F2101/308C02F2101/34C02F2101/38
Inventor 张鹏孙红文范明毅王翠苹郝越力蒙星英
Owner NANKAI UNIV
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