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Preparation method of confinement type carbon nanotube material

A technology of carbon nanotubes and confinement, which is applied in the field of preparation of confinement carbon nanotube materials, can solve the problems of low ozone utilization rate, economic discount, high cost, etc., reduce processing energy consumption, improve degradation efficiency, structure stable effect

Pending Publication Date: 2021-05-14
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the emerging processes for advanced treatment of related wastewater, the processes with good application effects include ozone oxidation process, membrane separation process, activated carbon adsorption with biological activated carbon, etc., and the common ozone process requires expensive ozone generating equipment. Economically It is greatly discounted, and the general utilization rate of ozone is very low. If the escaped ozone is not treated in time, it will cause serious air pollution problems. The membrane treatment process is effective in treating water quality, but it is expensive and requires irregular maintenance

Method used

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Examples

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Effect test

Embodiment 1

[0032] A method for deep degradation of antibiotics by confined carbon nanotube materials, comprising the following steps:

[0033] 1) Pretreatment of carbon nanotubes: put commercially available industrial-grade carbon nanotubes into nitric acid with a mass fraction of 63%, ultrasonicate the two for 2 hours, wherein the concentration of carbon nanotubes in the solution is 100g / L, and then add flat bottom The flask was heated and refluxed at 115°C for 9 hours in an oil bath, taken out, filtered and washed with deionized water until pH = 6.1, freeze-dried at -45°C for 36 hours, and the processed carbon nanotubes were collected for later use;

[0034] 2) Loading of carbon nanotubes: the (Co(NO 3 ) 2· 6H 2 O) Dissolve in the absolute ethanol solution and ultrasonically disperse for 30min, configure a cobalt nitrate solution with a concentration of 0.4mol / L, then add the pretreated carbon nanotubes into the cobalt nitrate solution for ultrasonic dispersion for 0.5h, and add carb...

Embodiment 2

[0036] A method for deep degradation of antibiotics by confined carbon nanotube materials, comprising the following steps:

[0037]1) Pretreatment of carbon nanotubes: put commercially available industrial-grade carbon nanotubes into nitric acid with a mass fraction of 63%, and ultrasonicate the two for 1 hour, wherein the concentration of carbon nanotubes in the solution is 50g / L, and then add flat-bottomed The flask was heated and refluxed at 98°C for 10 hours in an oil bath, taken out, filtered and washed with deionized water until pH = 6.3, freeze-dried at -45°C for 38 hours, and the processed carbon nanotubes were collected for later use;

[0038] 2) Loading of carbon nanotubes: the (Co(NO 3 ) 2· 6H 2 O) blend into the absolute ethanol solution and ultrasonically disperse for 25min, configure a cobalt nitrate solution with a concentration of 0.9mol / L, then add the pretreated carbon nanotubes into the cobalt nitrate solution for ultrasonic dispersion for 1h, and add carb...

Embodiment 3

[0041] A method for deep degradation of antibiotics by confined carbon nanotube materials, comprising the following steps:

[0042] 1) Pretreatment of carbon nanotubes: put commercially available industrial-grade carbon nanotubes into 63% nitric acid by mass fraction, ultrasonicate the two for 3 hours, wherein the concentration of carbon nanotubes in the solution is 50 g / L, and then add them to a flat-bottomed flask Heat and reflux at 110°C in an oil bath for 14 hours, take it out, wash it with deionized water until pH = 6.6, freeze-dry it at -45°C for 45 hours, and collect the processed carbon nanotubes for later use;

[0043] 2) Loading of carbon nanotubes: the (Co(NO 3 ) 2· 6H 2 O) blend into the absolute ethanol solution for ultrasonic dispersion for 20min, configure a cobalt nitrate solution with a concentration of 2.0mol / L, then add the pretreated carbon nanotubes into the cobalt nitrate solution for ultrasonic dispersion for 2h, and add carbon nanotubes The volume ra...

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Abstract

The invention relates to a preparation method of a confinement type carbon nanotube material. According to the method, cobaltosic oxide (Co3O4) is loaded in a carbon nanotube (CNT) to prepare a confinement type carbon nanotube material. The carbon nanotube material prepared by the invention can activate persulfate radicals in a peroxymonosulfate solution to generate sulfate radical free radicals with strong oxidizing property, so as to degrade antibiotics in pharmaceutical wastewater. On one hand, the limited-range carbon nanotube material reacts with pollutants in the tube to strengthen the degradation effect of antibiotics, on the other hand, the reaction pH can be reduced in the peroxymonosulfate activation process, so that the treatment efficiency of related materials is reduced, and compared with other carbon materials of the same type, the limited-range carbon nanotube material is higher in acid environment adaptability, and therefore, the degradation process in a peroxymonosulfate system is more stable. The confinement type carbon nanotube material provided by the invention can efficiently degrade antibiotic materials in pharmaceutical wastewater, and has the advantages of rapid reaction, high stability and no secondary pollution problem.

Description

technical field [0001] The invention belongs to the field of medical wastewater treatment technology, and in particular relates to a preparation method of a confined carbon nanotube material. The prepared confined carbon nanotube material can deeply degrade antibiotics. Background technique [0002] For a long time, antibiotics have been indispensable in people's daily life, a class of drugs used to inhibit the growth of bacteria or kill bacteria, such as norfloxacin, cephradine, amoxicillin, tetracycline and other common drugs. Due to its large number of users and large demand, a large amount of waste water containing antibiotics will be generated during its production and daily use. People exposed to antibiotics for a long time will destroy their own beneficial bacteria and develop drug resistance at the same time. Babies, the elderly, and pregnant women will threaten their lives when they are exposed to antibiotics for a long time. The daily biochemical treatment discha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/168C01G51/04C02F1/72C02F101/30
CPCC01B32/168C01G51/04C02F1/725C02F2101/30C01P2004/80
Inventor 刘志英徐炎华张雯雯宋文斌刘璧铭
Owner NANJING UNIV OF TECH
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