Unlock instant, AI-driven research and patent intelligence for your innovation.

Activated persulfate catalyst prepared with modified carbon nanotubes and its preparation and application

A technology for activating persulfate and carbon nanotubes, which is applied in the functional fields of water treatment and environmental materials, can solve the problems of limiting the application of PMS oxidation reaction, difficulty in recycling, secondary pollution, etc., and achieves easy control of the reaction process and low cost , The effect of low equipment requirements

Active Publication Date: 2021-04-06
NANJING TECH UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potassium persulfate (PMS) oxidation reaction is usually carried out under homogeneous conditions, but homogeneous catalysts have the disadvantages of being soluble in water and difficult to recycle and reuse, resulting in high cost and possible secondary pollution.
These disadvantages limit the application of PMS oxidation reaction in the degradation of organic wastewater

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Activated persulfate catalyst prepared with modified carbon nanotubes and its preparation and application
  • Activated persulfate catalyst prepared with modified carbon nanotubes and its preparation and application
  • Activated persulfate catalyst prepared with modified carbon nanotubes and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Take 20g of carbon nanotubes, slowly add 200mL of 60% nitric acid at 20°C, stir at a speed of 60r / min for 30min until the carbon nanotubes are completely submerged and fully mixed with nitric acid, and let stand for 20h , to obtain modified carbon nanotubes.

[0029] (2) The modified carbon nanotubes obtained above are subjected to suction filtration, and are cleaned with 100ml deionized water each time during suction filtration, treated 5 times, put into an oven, and dried to constant weight at 60°C to obtain Modified carbon nanotube support.

[0030] (3) The aforementioned modified carbon nanotube support was impregnated with Co(NO 3 ) 2 ·6H 2 O solution, ultrasonic at 80kHz for 30min at 20°C, calcined at 500°C for 4h, and cooled to room temperature to obtain the metal / modified carbon nanotube catalyst prepared by ultrasonic impregnation, with Co 3 o 4 The active component load is calculated as 5wt.%.

[0031] (4) Experimental conditions for persulfate oxidati...

Embodiment 2

[0033] (1) Take 20g of carbon nanotubes, slowly add 300mL of 50% nitric acid at 20°C, stir at a speed of 50r / min for 30min until the carbon nanotubes are completely submerged and fully mixed with nitric acid, and let stand for 18h , to obtain modified carbon nanotubes.

[0034] (2) The modified carbon nanotubes obtained above are subjected to suction filtration. During the suction filtration, 100ml of deionized water is used to clean each time, and they are treated for 5 times. They are put into an oven and dried to constant weight at 80°C to obtain Modified carbon nanotube support.

[0035] (3) The aforementioned modified carbon nanotube support was impregnated with Fe(NO 3 ) 3 9H 2 O solution, ultrasonic at 60kHz for 30min at 20°C, calcined at 600°C for 4h, and cooled to room temperature to obtain the metal / modified carbon nanotube catalyst prepared by ultrasonic impregnation, with Co 3 o 4 The active component load is calculated as 5wt.%.

[0036] (4) Experimental con...

Embodiment 3

[0038] (1) Take 30g of carbon nanotubes, slowly add 500mL of sulfuric acid with a percentage content of 50% at 20°C, stir at a speed of 60r / min for 30min until the carbon nanotubes are completely submerged and fully mixed with sulfuric acid, and stand for 22h , to obtain modified carbon nanotubes.

[0039] (2) The modified carbon nanotubes obtained above are subjected to suction filtration. During the suction filtration, 100ml of deionized water is used to clean each time, and they are treated for 5 times. They are put into an oven and dried to constant weight at 80°C to obtain Modified carbon nanotube support.

[0040] (3) The aforementioned modified carbon nanotube support was impregnated with Co(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 9H 2 O solution, under the condition of 20 ℃, ultrasonic at a frequency of 50 kHz for 20 min, roasted at 700 ℃ for 4 h, and cooled to room temperature, the metal / modified carbon nanotube catalyst prepared by ultrasonic impregnation was obtained...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a catalyst for preparing high-efficiency activated persulfate by using modified carbon nanotubes, a preparation method and application thereof, and belongs to the functional fields of water treatment and environmental materials. The present invention uses modified carbon nanotubes as carrier material, and Fe 2 O 3 , SrO, Ag 2 O, CuO, Bi 2 O 3 and Co 3 O 4 One or more than two of them are used as active components, and a new type of high-efficiency activated persulfate catalyst is prepared after ultrasonication and impregnation. The persulfate oxidation reaction catalyst prepared by the present invention has the advantages of good dispersibility, high catalytic activity, strong stability, low cost, low equipment requirements, etc., and the removal rate of antibiotics in high-concentration antibiotic wastewater can reach more than 99%. The removal rate of TOC reaches over 70%. The catalyst prepared by the invention has the characteristics of being recyclable, avoiding secondary pollution of water bodies with metal residues, and the like, and is beneficial to the popularization of persulfate advanced oxidation technology in the industrial application of treating antibiotic waste water.

Description

technical field [0001] The invention relates to a method and application of a novel modified carbon nanotube for preparing a highly efficient activated persulfate catalyst, which is suitable for catalyzing persulfate oxidation to treat refractory organic wastewater, and belongs to the functional fields of water treatment and environmental materials. Background technique [0002] In recent years, the production and use of a large number of antibiotics has led to excessive discharge of antibiotics, which has caused serious pollution to my country's water resources. Antibiotic wastewater is a kind of high-concentration organic wastewater with biological toxicity. At present, the treatment methods of antibiotic wastewater mainly include biological methods such as activated sludge and deep well aeration, physical methods such as sedimentation flocculation and air flotation, and advanced oxidation methods such as Fenton oxidation. Among them, the larger antibiotic manufacturers i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/50B01J23/745B01J23/75B01J23/78B01J23/843C02F1/72C02F101/30C02F103/34
CPCB01J23/002B01J23/50B01J23/745B01J23/75B01J23/78B01J23/8437B01J2523/00C02F1/725C02F2101/30C02F2103/343B01J2523/54B01J2523/842B01J2523/845
Inventor 黄菲张璐璐吴佳鑫于杨张立慧黄和乔纳森贝尔
Owner NANJING TECH UNIV