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Covalent organic framework film material for removing triclosan in environmental water as well as preparation method and application of same

A technology of covalent organic framework and thin film materials, applied in chemical instruments and methods, inorganic chemistry, water pollutants, etc., can solve the problems of affecting TCS adsorption, no selectivity of adsorption, unfavorable repeated use, etc., and achieve low cost and high efficiency Absorptive capacity, not easily broken effect

Active Publication Date: 2020-09-11
MINJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Studies have found that some commonly used adsorbents such as activated carbon and carbon nanotubes can effectively remove TCS in water, but this adsorption is not selective. When other pollutants in water are high, the adsorption of TCS will be affected, and it is not conducive to repeated use.
In addition, there is also a method of using protonated bean cake to remove TCS in wastewater (CN 105000620 B), but the whole process requires a series of cumbersome processes such as stirring, shaking, filtration and separation, and the filtrate needs to be adjusted to neutrality, resulting in increased costs, time-consuming and laborious

Method used

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  • Covalent organic framework film material for removing triclosan in environmental water as well as preparation method and application of same
  • Covalent organic framework film material for removing triclosan in environmental water as well as preparation method and application of same
  • Covalent organic framework film material for removing triclosan in environmental water as well as preparation method and application of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Preparation of TAPB-TPA-COFs membrane:

[0059] 1) 0.799mol PTSA and 0.267mol TAPB were dissolved in 100 mL of acetonitrile aqueous solution (V MeCN :V H2O =3:7), ultrasonic waves were added to disperse and dissolve to obtain a TAPB / PTSA solution, and pipette 50 mL of the TAPB / PTSA solution into a 250 mL beaker.

[0060] 2) Dissolve 0.267mol TPA in 100 mL ethyl acetate solution, pipette 50 mL of TPA mixture and slowly add it on top of TAPB / PTSA solution, and form an organic phase / aqueous phase interface.

[0061] 3) Seal the beaker with parafilm and let it stand under light for 1-8 days. The growth process is as follows: figure 2 As shown, with the increase of the growth days, the color of the TAPB-TPA-COFs solution gradually deepened to orange-yellow, and the thickness of the film also gradually increased.

[0062] 4) When the TAPB-TPA-COFs film grows out and has a certain thickness, remove the upper organic phase solution, and take out the TAPB-TPA-COFs film into ...

Embodiment 2

[0065] Performance characterization of TAPB-TPA-COFs film under natural light and sunlight:

[0066] 1) 0.799mol PTSA and 0.267mol TAPB were dissolved in 100 mL of acetonitrile aqueous solution (V MeCN :V H2O =3:7), ultrasonic waves were added to disperse and dissolve to obtain a TAPB / PTSA solution, and pipette 50 mL of the TAPB / PTSA solution into a 250 mL beaker.

[0067] 2) Dissolve 0.267 mol of TPA in 100 mL of ethyl acetate solution, pipette 50 mL of TPA mixture and add it slowly on top of TAPB / PTSA solution to form an organic phase / aqueous phase interface.

[0068] 3) Seal the beaker with parafilm, and let it stand for 8 days under natural light indoors and sunlight outdoors.

[0069] 4) When the TAPB-TPA-COFs film grows out and has a certain thickness, remove the upper organic phase solution, and take out the TAPB-TPA-COFs film into a petri dish as a support with an aqueous phase filter paper.

[0070] 5) successively use acetonitrile aqueous solution (V MeCN :V H2O...

Embodiment 3

[0073] According to the steps of Example 2, in step 3, the illumination conditions were changed, and the grown TAPB-TPA-COFs film was subjected to X-ray under the irradiation of 365nm ultraviolet light (5W), indoor natural light, outdoor sunlight, and incandescent lamp (30W). Diffraction (XRD) analysis, the results are as follows Figure 4 shown.

[0074] Depend on Figure 4 It can be seen that COFs films of a certain crystal form can be formed under the four light conditions, and the samples obtained under natural light and sunlight show a sharper peak at [100], indicating that the prepared material has better crystallinity and a more structured crystal form. The TAPB-TPA-COFs film has an obvious strong diffraction peak at 2θ=2.3° in the small angle region, corresponding to the (100) diffraction crystal plane. This result indicates that the material has better crystallinity on the (100) crystal plane. This is consistent with most reported COFs materials. The spacing of CO...

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Abstract

The invention discloses a covalent organic framework film material for removing triclosan in environmental water as well as a preparation method and application of same. In particular, terephthalaldehyde and 1,3,5-tri-(4-aminophenyl) benzene are used as bridging monomers, p-toluenesulfonic acid monohydrate is used as a catalyst, an acetonitrile-water solution and an ethyl acetate solution are usedas two-phase solvents, and the novel TAPB-TPA-COFs film is polymerized at room temperature through a liquid phase interface method. The prepared film material is prepared into a small solid-phase extraction column, an excellent adsorption effect on triclosan in environmental water is achieved, the maximum adsorption capacity can reach 12.21 mg / g, and the optimal removal rate of TCS can reach 99.72%. The TAPB-TPA-COFs membrane is relatively good in crystallinity, high in thermal stability and low in cost, has efficient adsorption performance on TCS, can be repeatedly utilized, and has a greatapplication prospect in the field of environmental pollutant enrichment and separation.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a covalent organic framework film material for removing triclosan in environmental water, a preparation method and application thereof. Background technique [0002] With the development of society and the progress of civilization, food, clothing, housing and transportation are not only enough to meet daily needs, people gradually begin to pursue healthier and more convenient lifestyles and product needs. Environmental issues have also gradually entered people's sights, and people began to pay attention to eating healthy and living safely. [0003] As a broad-spectrum antibacterial agent, TCS is widely used in personal daily care products, and is discharged into the water environment with domestic sewage after use. Studies have shown that TCS may be biologically toxic, and it is likely to be converted into toxic substances in the environment and enriched in the envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08G12/08B01J20/26B01J20/28C02F1/28B01J20/30C02F101/36C08L61/22
CPCC08J5/18C08G12/08B01J20/262B01J20/28033C02F1/285C02F2101/36C08J2361/22
Inventor 李艳霞钱承秀王军许鹏俊
Owner MINJIANG UNIV
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