A kind of copper oxide/nitrogen doped amorphous carbon composite material and its preparation and application

A technology of amorphous carbon and composite materials, applied in oxidation water/sewage treatment, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as high cost, complex synthesis process, limited application, etc. Simple preparation process and good effect

Active Publication Date: 2020-05-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon materials can avoid secondary pollution caused by metal leaching, but often require further chemical modification or functionalization due to the lack of active functional groups, and the synthesis process is complex and costly, which strictly limits the use of these catalytic materials in activating persulfate to degrade organic pollutants. Applications

Method used

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  • A kind of copper oxide/nitrogen doped amorphous carbon composite material and its preparation and application
  • A kind of copper oxide/nitrogen doped amorphous carbon composite material and its preparation and application
  • A kind of copper oxide/nitrogen doped amorphous carbon composite material and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 3 g of dicyandiamide, 0.296 g of copper nitrate and 0.5 g of polyvinylpyrrolidone into 80 mL of deionized water, stir magnetically for 10 min until it is completely dissolved, then add 2.196 g of urea into the reaction solution, stir for 30 min, and dissolve the mixture Put it into an ultrasonic reactor, the ultrasonic power is 800W, the stirring speed is 700r / min, and the heating temperature is 80°C until it is completely dry. Then the resulting mixture was transferred to a tube furnace with a nitrogen atmosphere, the heating rate was 3°C / min, and the temperature was maintained at 700°C for 3 hours. The obtained material was washed with 1mol / L hydrochloric acid to remove excess copper ions, and then washed three times with pure water, ethanol Wash three times, filter with suction, and dry in an oven at 60° C. for 4 hours to obtain a copper oxide / nitrogen-doped amorphous carbon composite material.

Embodiment 2

[0036] Add 3 g of dicyandiamide, 1.48 g of copper nitrate and 0.5 g of polyvinylpyrrolidone into 80 mL of deionized water, stir magnetically for 10 min until it is completely dissolved, then add 2.196 g of urea into the reaction solution, stir for 30 min, and dissolve the mixture Put it into an ultrasonic reactor, the ultrasonic power is 800W, the stirring speed is 700r / min, and the heating temperature is 80°C until it is completely dry. Then the resulting mixture was transferred to a tube furnace with a nitrogen atmosphere, the heating rate was 3°C / min, and the temperature was maintained at 700°C for 3 hours. The obtained material was washed with 1mol / L hydrochloric acid to remove excess copper ions, and then washed three times with pure water, ethanol Wash three times, filter with suction, and dry in an oven at 60° C. for 4 hours to obtain a copper oxide / nitrogen-doped amorphous carbon composite material.

Embodiment 3

[0038]Add 3g of dicyandiamide, 0.34g of copper chloride and 0.5g of polyvinylpyrrolidone into 80 mL of deionized water, stir magnetically for 10 min until it is completely dissolved, then add 2.196g of urea into the reaction solution, stir for 30 min, and The mixture was put into an ultrasonic reactor, the ultrasonic power was 800W, the stirring speed was 700r / min, and the heating temperature was 80°C until it was completely dry. Then the resulting mixture was transferred to a tube furnace with a nitrogen atmosphere, the heating rate was 3°C / min, and the temperature was maintained at 700°C for 3 hours. The obtained material was washed with 1mol / L hydrochloric acid to remove excess copper ions, and then washed three times with pure water, ethanol Wash three times, filter with suction, and dry in an oven at 60° C. for 4 hours to obtain a copper oxide / nitrogen-doped amorphous carbon composite material.

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Abstract

The invention discloses a copper oxide / nitrogen doped amorphous carbon composite material as well as preparation and application thereof. The preparation method concretely comprises the following steps: fully mixing carbon source and nitrogen source dicyandiamide and copper salt, which are used as raw materials, in an ultrasonic reactor according a certain proportion for carrying out a reaction bytaking urea as an alkali source to adjust the solution to alkaline and using polyvinylpyrrolidone as a surfactant; heating to dryness, and carbonizing, pickling and washing the obtained mixture so asto obtain a material which is supported in nitrogen-doped amorphous carbon by means of copper oxide. The material is novel in structure, easy in obtaining of the raw materials, simple in process, clean in reaction process and free from secondary pollution. The copper oxide / nitrogen doped amorphous carbon composite material is applied to degradation and removal of phenol in water body, is simple in method and good in removal effect, and can be used for treating the phenol with a concentration of 0.1mmol / L; the phenol removal rate can reach 99% or above within 20min.

Description

technical field [0001] The invention relates to the field of preparation technology of catalytic materials for heterogeneous catalytic activation of persulfate, in particular to a copper oxide / nitrogen-doped amorphous carbon composite material and its preparation method and its application in catalytic degradation of phenol in water. Background technique [0002] Advanced oxidation technology based on sulfate radicals is currently a very important method for the advanced treatment of refractory organic pollutants. Due to its high efficiency in degrading organic pollutants, it has broad application prospects in the field of water treatment. Sulfate radicals can be generated by activating persulfate through light, microwave, heating, transition metal ion catalysis, etc., but photoactivation and microwave activation have strict requirements on equipment and technology. Ionic catalysis has problems such as secondary pollution, difficult separation, and poor reusability. The het...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/72C02F101/34
CPCB01J27/24C02F1/725C02F2101/345
Inventor 杨卫春姜智柴立元李超芳杨志辉李昕雨王海鹰李青竹
Owner CENT SOUTH UNIV
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