Iron-cobalt bimetal-organic framework material based on 2, 5-dihydroxy terephthalic acid ligand as well as preparation method and application of iron-cobalt bimetal-organic framework material

A technology of hydroxyterephthalic acid and organic framework, which is applied in the field of iron-cobalt bimetallic-organic framework materials and its preparation, can solve the problems of secondary pollution, increase of processing costs, cobalt ions cannot be recycled and utilized in the environment, and achieve high utilization rate High, short reaction time, good removal effect

Pending Publication Date: 2020-02-28
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the cobalt ions existing in the cobalt ion activated permonosulfate reaction system in the prior art, which cannot be recycled and cause secondary pollution to the environment, it is necessary to further increase the treatment processes such as ion exchange, adsorption, precipitation and separation, which increases the treatment cost and other problems and shortcomings, the present invention provides an iron-cobalt bimetallic-organic framework material and its preparation method and application in the field of wastewater treatment

Method used

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  • Iron-cobalt bimetal-organic framework material based on 2, 5-dihydroxy terephthalic acid ligand as well as preparation method and application of iron-cobalt bimetal-organic framework material
  • Iron-cobalt bimetal-organic framework material based on 2, 5-dihydroxy terephthalic acid ligand as well as preparation method and application of iron-cobalt bimetal-organic framework material
  • Iron-cobalt bimetal-organic framework material based on 2, 5-dihydroxy terephthalic acid ligand as well as preparation method and application of iron-cobalt bimetal-organic framework material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Preparation of Iron-Cobalt Bimetallic-Organic Framework Materials

[0036] (1) Preparation of precursor solution: 0.873g (3mM) Co(NO 3 ) 2 ·6H 2 O, 0.596g (3mM) FeCl 2 4H 2 O and 0.498g (3mM) 2,5-dihydroxyterephthalic acid (DTPA) were dissolved in 60mL N,N-dimethylformamide (DMF) and ethanol mixture (DMF:ethanol=1:1), Stir the above mixed solution until it is completely dissolved to obtain a precursor solution;

[0037] (2) Iron-cobalt bimetallic-organic framework based on 2,5-dihydroxyterephthalic acid ligand: the precursor solution prepared in step (1) was transferred to a 100mL polytetrafluoroethylene-lined autoclave , put the reaction kettle in a programmed oven, solvothermal reaction at 150°C for 24h; cool down, cool down to room temperature naturally, filter with a vacuum pump and repeat with absolute ethanol, N,N-dimethylformamide (DMF) and deionized water Wash to obtain a brown precipitate; put the precipitate in a vacuum oven at 100°C and dry for 12 hours...

Embodiment 2

[0040] (1) Preparation of precursor solution: 0.873g (3mM) Co(NO 3 ) 2 ·6H 2 O, 0.596g (3mM) FeCl 2 4H 2 O and 0.498g (3mM) 2,5-dihydroxyterephthalic acid (DTPA) were dissolved in 60mL N,N-dimethylformamide (DMF) and ethanol mixture (DMF:ethanol=1:1), Stir the above mixed solution until it is completely dissolved to obtain a precursor solution;

[0041] (2) Iron-cobalt bimetallic-organic framework based on 2,5-dihydroxyterephthalic acid ligand: the precursor solution prepared in step (1) was transferred to a 100mL polytetrafluoroethylene-lined autoclave , put the reaction kettle in a programmed oven, solvothermal reaction at 110°C for 24 hours; cool down, naturally cool down to room temperature, filter with a vacuum pump and repeat with absolute ethanol, N,N-dimethylformamide (DMF) and deionized water Wash to obtain a brown precipitate; put the precipitate in a vacuum oven at 100°C and dry for 12 hours to obtain a black solid powder, which is an iron-cobalt bimetallic-org...

Embodiment 3

[0044] (1) Preparation of precursor solution: 0.873g (3mM) Co(NO 3 ) 2 ·6H 2 O, 0.596g (3mM) FeCl 2 4H 2 O and 0.498g (3mM) 2,5-dihydroxyterephthalic acid (DTPA) were dissolved in 60mL N,N-dimethylformamide (DMF) and ethanol mixture (DMF:ethanol=1:1), Stir the above mixed solution until it is completely dissolved to obtain a precursor solution;

[0045] (2) Iron-cobalt bimetallic-organic framework based on 2,5-dihydroxyterephthalic acid ligand: the precursor solution prepared in step (1) was transferred to a 100mL polytetrafluoroethylene-lined autoclave , put the reaction kettle in a programmed oven, solvothermal reaction at 170°C for 24 hours; cool down, cool down to room temperature naturally, and filter with absolute ethanol, N,N-dimethylformamide (DMF) and deionized water repeatedly Wash to obtain a brown precipitate; put the precipitate in a vacuum oven at 100°C and dry for 12 hours to obtain a black solid powder, which is an iron-cobalt bimetallic-organic framework ...

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Abstract

The invention relates to an iron-cobalt bimetal-organic framework material based on a 2, 5-dihydroxy terephthalic acid ligand as well as a preparation method and application of the iron-cobalt bimetal-organic framework material. The preparation method comprises following steps: dissolving cobalt nitrate hexahydrate, ferrous chloride tetrahydrate and 2, 5-dihydroxy terephthalic acid in an organic solvent to obtain a precursor solution; carrying out solvothermal reaction on the precursor solution at the temperature of 110-170 DEG C; and after the reaction is finished, carrying out post-treatmentto obtain the iron-cobalt bimetal-organic framework material. Highly dispersed cobalt and iron active center ions in the iron-cobalt bimetal-organic framework material can enhance effective contact of cobalt ions and iron with a peroxymonosulfate to generate sulfate free radicals with strong oxidizing property, so that refractory organic pollutants in wastewater are removed. The iron-cobalt bimetal-organic framework material based on the 2, 5-dihydroxy terephthalic acid ligand is suitable for treating various organic wastewater, is high in efficiency, good in durability, convenient to operateand environmentally friendly, and possesses a wide prospect in treating toxic, harmful and non-biodegradable organic wastewater.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to an iron-cobalt bimetallic-organic framework material based on 2,5-dihydroxyterephthalic acid ligands and a preparation method and application thereof. Background technique [0002] With the rapid development of industry, the treatment of water pollution has become a worldwide problem. The widespread existence of refractory organic pollutants makes water treatment more and more people's attention. Refractory organic pollutants are difficult to remove by traditional biological, physical and chemical methods due to their complex composition, stable structure and long half-life. Moreover, most of the refractory organic pollutants have certain toxicity and are easy to stay in the living body, thus causing cancer, distortion and feminization of humans and animals. Advanced oxidation technology has the characteristics of fast, non-selective, and thorough oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/16B01J31/28C02F1/72C02F101/30
CPCB01J31/1691B01J31/28C02F1/725C02F1/722C02F2101/30
Inventor 李欢旋唐俊红
Owner HANGZHOU DIANZI UNIV
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