A magnetic recyclable coni-mofs@gr adsorbent and its preparation method and its application to the adsorption of organic dyes

A technology of organic dyes and adsorbents, applied in the direction of selective adsorption, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of low efficiency and high cost of wastewater treatment, achieve high thermal stability, enhanced chemical stability, The effect of increasing the specific surface area

Active Publication Date: 2022-03-18
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of high cost and low efficiency in the existing wastewater treatment, the present invention provides a magnetically recyclable CoNi-MOFs@GR adsorbent and its preparation method and its application to the adsorption of organic dyes. Large surface area and significantly enhanced effect on treating organic dye wastewater

Method used

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  • A magnetic recyclable coni-mofs@gr adsorbent and its preparation method and its application to the adsorption of organic dyes
  • A magnetic recyclable coni-mofs@gr adsorbent and its preparation method and its application to the adsorption of organic dyes
  • A magnetic recyclable coni-mofs@gr adsorbent and its preparation method and its application to the adsorption of organic dyes

Examples

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Effect test

Embodiment 1

[0024] Example 1: 0.275 mmol of Co(NO 3 ) 2 , 0.275 mmol of Ni(NO 3 ) 2 and 0.65 mmol of 2-aminoterephthalic acid were added to 36 mL of solvent (30 mL of N.N-dimethylformamide, 3 mL of ethanol and 3 mL of secondary water) for sonication. The resulting product was sealed in a reactor and heated at 160 °C for 20 h. Then the reactor was cooled to room temperature, and the solid was collected and washed several times with secondary water. Finally, the obtained solid was dried overnight at 60 °C to obtain magnetic CoNi-MOFs powder.

[0025] Add 3.0 mg / mL graphene and 5 mg / mL CoNi-MOFs to water, and ultrasonicate at 40 KHz for 20 min to form a uniform dispersion. Vacuum drying at 60 °C yielded CoNi-MOFs@GR adsorbent.

Embodiment 2

[0026] Example 2: 0.375 mmol of Co(NO 3 ) 2 , 0.375 mmol of Ni(NO 3 ) 2 and 0.75 mmol of 2-aminoterephthalic acid were added to 36 mL of solvent (32 mL of N.N-dimethylformamide, 2 mL of ethanol and 2 mL of secondary water) for sonication. The resulting product was sealed in a reactor and heated at 200 °C for 24 h. Then the reactor was cooled to room temperature, and the solid was collected and washed several times with secondary water. Finally, the obtained solid was dried overnight at 60 °C to obtain magnetic CoNi-MOFs powder.

[0027] 5.0 mg / mL graphene and 8 mg / mL CoNi-MOFs were added to water, and ultrasonicated at 40 KHz for 30 min to form a uniform dispersion. Vacuum drying at 60 °C yielded CoNi-MOFs@GR adsorbent.

Embodiment 3

[0028] Embodiment 3: the Co(NO of 0.475 mmol 3 ) 2 , 0.475 mmol of Ni(NO 3 ) 2and 0.85 mmol of 2-aminoterephthalic acid were added to 36 mL of solvent (33 mL of N.N-dimethylformamide, 1.5 mL of ethanol and 1.5 mL of secondary water) for sonication. The resulting product was sealed in a reactor and heated at 220 °C for 28 h. Then the reactor was cooled to room temperature, and the solid was collected and washed several times with secondary water. Finally, the obtained solid was dried overnight at 60 °C to obtain magnetic CoNi-MOFs powder.

[0029] Add 8.0 mg / mL graphene and 10 mg / mL CoNi-MOFs to water, and ultrasonicate at 40 KHz for 40 min to form a uniform dispersion. Vacuum drying at 60 °C yielded CoNi-MOFs@GR adsorbent.

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Abstract

The invention belongs to the technical field of preparation of dye adsorption materials, and provides a magnetic recyclable CoNi-MOFs@GR adsorbent, a preparation method and an application for adsorption of organic dyes. The CoNi‑MOFs@GR adsorbent is a bimetallic organic framework compound CoNi‑MOFs supported on graphene GR. CoNi‑MOFs have large specific surface areas, active sites, and pores. GR has high thermal stability, can be used as an adsorbent carrier itself and has adsorption function, and it also has a large specific surface area and active sites. The adsorbent formed by GR and CoNi‑MOFs has the advantages of increased specific surface area, more active sites, and enhanced chemical stability, which enhances its adsorption capacity and can achieve efficient adsorption of methylene blue MB, Congo red CR and neutral red NR. Separation, easy to separate from the solution, and can be recycled and reused.

Description

technical field [0001] The invention belongs to the technical field of preparation of dye adsorption materials, and in particular relates to a magnetically recyclable CoNi-MOFs@GR adsorbent and its preparation method and its application to the adsorption of organic dyes, especially to the adsorption application of three organic dyes. Background technique [0002] With the rapid development of science and technology and the steady improvement of industrial technology, dyes have been widely used in various fields such as printing, textiles, plastics, leather, coatings, and food industries, making extremely important contributions to economic development and people's lives. However, the dye pollution caused by the unavoidable discharge into the water body along with the production, transportation and employment process may pose adverse and serious threats to the ecological environment and human health. Most dyes in wastewater are usually highly toxic and difficult to degrade du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01J20/32B01D15/08C02F1/28C02F101/30
CPCB01J20/226B01J20/20B01J20/28009B01J20/3085B01J20/3204B01D15/08C02F1/288C02F2101/308C02F2303/16
Inventor 雷鹏周影双少敏董川
Owner SHANXI UNIV
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