A preparation method and application of triiron tetroxide@cyclodextrin/carbon nanotube composite that synergistically catalyzes tetrabromobisphenol A in water

A technology of iron tetroxide and carbon nanotubes, applied in chemical instruments and methods, chemical/physical processes, oxidized water/sewage treatment, etc., can solve the problems of excessively long reaction time, poor removal rate, and high removal rate , to achieve the effect of good catalytic performance, preventing agglomeration and high removal rate

Active Publication Date: 2020-09-08
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The existing problems of the heterogeneous Fenton catalysts obtained by the research are: the removal rate is high only in the strongly acidic environment, the removal rate is poor in the neutral and alkaline environment, and the reaction time is too long

Method used

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  • A preparation method and application of triiron tetroxide@cyclodextrin/carbon nanotube composite that synergistically catalyzes tetrabromobisphenol A in water
  • A preparation method and application of triiron tetroxide@cyclodextrin/carbon nanotube composite that synergistically catalyzes tetrabromobisphenol A in water
  • A preparation method and application of triiron tetroxide@cyclodextrin/carbon nanotube composite that synergistically catalyzes tetrabromobisphenol A in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Treat 25 mg of carbon nanotubes in 20 ml of ethylene glycol solution with an ultrasonic cell disruptor for 30 minutes to disperse the carbon nanotubes evenly.

[0029] (2) Add 0.4g FeCl 3 ·6H 2 O, 1.13g NaAc and 0.4g β-CD were mixed in 10ml ethylene glycol, added to the above mixture, and ultrasonically oscillated for 10 minutes.

[0030] (3) The mixture was transferred to a 50ml polytetrafluoroethylene-sealed autoclave, placed in a vacuum drying oven, heated at 200°C for 8 hours, and cooled to room temperature.

[0031] (4) The separated catalyst was washed with ionized water and absolute ethanol, and finally, the final catalyst was dried in a vacuum oven at 50° C. for 24 hours for use.

[0032] The prepared Fe3O4 / Carbon Nanotube@Cyclodextrin material was placed under a transmission electron microscope (TEM) to observe the morphology and particle size of the material, and it was found that cyclodextrin modified Fe3O3 particles (200nm) were attached The carbon na...

Embodiment 2

[0034] (1) Treat 25 mg of carbon nanotubes in 20 ml of ethylene glycol solution with an ultrasonic cell disruptor for 30 minutes to disperse the carbon nanotubes evenly.

[0035] (2) Add 0.4g FeCl 3 ·6H 2 O, 1.13g NaAc and 0.4g β-CD were mixed in 10ml ethylene glycol, added to the above mixture, and ultrasonically oscillated for 10 minutes.

[0036] (3) The mixture was transferred to a 50ml polytetrafluoroethylene-sealed autoclave, placed in a vacuum drying oven, heated at 200°C for 8 hours, and cooled to room temperature.

[0037] (4) The separated catalyst was washed with ionized water and absolute ethanol, and finally, the final catalyst was dried in a vacuum oven at 50° C. for 24 hours for use.

[0038] The prepared material was catalytically degraded with TBBPA as the target pollutant to verify the catalytic performance of the prepared material.

[0039] A known amount of the prepared catalyst was added to a 50 mL Erlenmeyer flask containing 10 mL of a reaction solutio...

Embodiment 3

[0041] (1) Treat 25 mg of carbon nanotubes in 20 ml of ethylene glycol solution with an ultrasonic cell disruptor for 30 minutes to disperse the carbon nanotubes evenly.

[0042] (2) Add 0.4g FeCl 3 ·6H 2 O, 1.13g NaAc and 0.4g β-CD were mixed in 10ml ethylene glycol, added to the above mixture, and ultrasonically oscillated for 10 minutes.

[0043] (3) The mixture was transferred to a 50ml polytetrafluoroethylene-sealed autoclave, placed in a vacuum drying oven, heated at 200°C for 8 hours, and cooled to room temperature.

[0044] (4) The separated catalyst was washed with ionized water and absolute ethanol, and finally, the final catalyst was dried in a vacuum oven at 50° C. for 24 hours for use.

[0045] Carry out magnetic separation to the catalyst that the embodiment 2 carries out catalytic treatment to TBBPA, after collecting, wash with deionized water and ethanol several times, dry and set aside. The optimal experimental conditions were repeated for catalytic degrada...

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Abstract

The invention discloses a preparation method and application of a ferroferric oxide@cyclodextrin / carbon nanotube compound capable of cooperatively catalyzing tetrabromobisphenol A (TBBPA) in water. The preparation method comprises the following steps: treating 25mg of carbon nanotubes in 20ml of an ethylene glycol solution and treating for 30min by utilizing an ultrasonic cell crusher to uniformlydisperse the carbon nanotubes; then mixing 0.4g of FeCl3.6H2O, 1.13g of NaAc and 0.4g of beta-CD in 10ml of ethylene glycol and adding into a mixed solution; carrying out ultrasonic oscillation for 10min; transferring a mixture into a high-pressure kettle sealed by 50ml of polytetrafluoroethylene; putting the high-pressure kettle into a vacuum drying box and heating at 200 DEG C for 8h; then cooling to room temperature; washing a separated catalyst with ionized water and absolute ethyl alcohol; finally, drying the final catalyst in a vacuum drying oven at 50 DEG C for 24h to obtain a materialfor later use; carrying out catalytic degradation on the prepared material by taking the TBBPA as a target pollutant and verifying catalytic performance of the prepared material. Compared with an existing catalyst, the prepared catalyst has better catalytic performance, is suitable for a wider pH (Potential of Hydrogen) range and has good stability, repeated utilization performance and anti-interference performance; the time of catalytic reaction is greatly shortened.

Description

technical field [0001] The invention relates to a preparation method and application of ferric iron tetroxide@cyclodextrin / carbon nanotube composite that synergistically catalyzes the removal of tetrabromobisphenol A from water, and belongs to the field of water treatment in environmental protection. Background technique [0002] In order to meet the rapid development of modern agriculture, chemical industry, and human activities, humans have produced more and more man-made chemicals. Since most of these industry-derived chemicals have never previously been found in the natural environment, they are hardly biodegradable, and many of these compounds exhibit considerable toxicity to microorganisms. Increasing evidence shows that a large amount of synthetic chemicals are released into the environment, posing serious threats to the safety of ecosystems and human health. Therefore, proper treatment should be done to remove these pollutants from wastewater, groundwater and even d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C02F1/28C02F1/72C02F101/36
CPCB01J31/065B01J35/0033C02F1/285C02F1/725C02F2101/36
Inventor 张一梅武盼盼赖毓娴赵亚龙
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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