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Two-dimensional metalloporphyrin-based COF (chip on film) material as well as film preparation method and application

A porphyrin-based, metal-based technology, applied in chemical instruments and methods, water/sludge/sewage treatment, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of little research on photocatalytic performance, Achieve the effect of improved catalytic degradation performance, large specific surface area, and good stability

Active Publication Date: 2019-03-15
HENAN INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research of porphyrin-based COF materials mainly focuses on the study of adsorption and photoelectric properties, while there are few studies on their photocatalytic properties.
However, there are no reports on the photocatalytic degradation of organic dyes by porphyrin COFs.

Method used

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  • Two-dimensional metalloporphyrin-based COF (chip on film) material as well as film preparation method and application
  • Two-dimensional metalloporphyrin-based COF (chip on film) material as well as film preparation method and application
  • Two-dimensional metalloporphyrin-based COF (chip on film) material as well as film preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of CuP-DHNDA-COF:

[0032] Copper 5,10,15,20-tetrakis-(4-aminophenyl)porphyrin (CuTAPP) (88.2mg, 0.12mmol), 2,6-dihydroxy-1,5-dialdehydenaphthalene (58.6mg ,0.24mmol), 0.6mL36% acetic acid, dichlorobenzene (3mL), and n-butanol (3mL) were added to a polytetrafluoroethylene-lined autoclave, and after ultrasonic dispersion for 20min, the autoclave was sealed and placed in an oven , 120 ° C reaction 3d. Then naturally cool to room temperature, centrifuge, and then wash with N,N-dimethylformamide, tetrahydrofuran, and acetone in order to wash away unreacted precursors and oligomers. Then vacuum-dried at 80° C. for 12 h to obtain 116.2 mg of a purple solid (theoretical yield: 138.2 mg), with a yield of 84.1%.

[0033] Such as figure 1 As shown, the product CuP-DHNDA-COF is at 1586cm -1 There is a strong absorption, which is the stretching vibration peak of the formed imine bond C=N, while the aldehyde group C=O in the raw material (1658cm -1 ) and amino N-H (32...

Embodiment 2

[0041] Photodegradation of methylene blue experiment: In order to further explore the performance of the synthesized CuP-DHNDA-COF material, a series of experiments were designed to verify the efficiency of its catalytic degradation of methylene blue.

[0042] Take 10 mg of the catalyst (CuP-DHNDA-COF), add 20 mg (10 mg / L) of methylene blue aqueous solution to it, and put the mixture into an ultrasonic cleaner to completely disperse the catalyst in the methylene blue aqueous solution. According to the above operation, prepare six test tubes for adding the above reaction solution, numbered 1, 2, 3, 4, 5, 6. After adding methylene blue aqueous solution and catalyst to No. React under dark conditions for 1 hour, and measure the UV-visible absorbance value of No. 2 after centrifugation. Measure the absorbance of No. 3 test tube after 15 minutes of visible light irradiation reaction, and measure the absorbance of the solutions in No. 4, No. 5 and No. 6 test tubes after 30 minutes, ...

Embodiment 3

[0045] Preparation of CuP-DHNDA-COF thin film: After amination treatment of ITO glass, first react with 2,6-dihydroxy-1,5-dialdehyde naphthalene, then take it out and wash it, put it in 5,10,15, 20-tetrakis-(4-aminophenyl)porphyrin copper solution followed by reaction, then removed and washed, and then put into the previous 2,6-dihydroxy-1,5-dialdehyde naphthalene solution, repeating this for 50 Take it out, wash it, dry it, and measure SEM to find that a dense film has formed.

[0046] Such as Figure 9 As shown, the XRD of CuP-DHNDA-COF film and powder have similar shapes, and the peak positions are consistent, indicating that the synthesized CuP-DHNDA-COF film has the same framework structure as the powder.

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Abstract

The invention discloses a two-dimensional metalloporphyrin-based COF (chip on film) material as well as a film preparation method and the application thereof, and belongs to the technical field of inorganic chemistry. In a high-pressure reaction vessel, CuP-DHNDA-COF is obtained by performing an aldimine condensation reaction and filtering. The method has the advantages of being simple in operation, high in yield, easy in large-scale production and the like; the material CuP-DHNDA-COF serving as a photocatalyst is used for degrading methylene blue dye, and the good capability of photocatalyticdegradation of organic pollutants is shown. Therefore, the material CuP-DHNDA-COF has potential application on the aspect of wastewater treatment of the dye.

Description

technical field [0001] The invention relates to a porphyrin-derived inorganic material, in particular to a two-dimensional metal porphyrin-based COF material and a film preparation method and application, and belongs to the technical field of inorganic chemistry. Background technique [0002] In recent years, with the in-depth development of industrialization, environmental problems, especially industrial wastewater, have become one of the environmental problems that need to be solved urgently. More than 100,000 organic pollutants, especially organic dyes, are discharged from factories every year, 7×10 5 Tons, these fuels are usually highly toxic, stable and difficult to biodegrade, which has become one of the global environmental problems today. Once these organic pollutants are released into the ecosystem, they will cause a series of problems, such as clogging sewage treatment pipes and affecting aquatic organisms. Therefore, effectively reducing the concentration of orga...

Claims

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Application Information

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IPC IPC(8): C08G83/00C02F1/30B01J31/22C02F101/30
CPCC02F1/30C08G83/008B01J31/1691B01J31/183B01J2531/16B01J2531/025C02F2101/308B01J35/39
Inventor 侯玉霞李英曲黎
Owner HENAN INST OF SCI & TECH
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