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Preparation method and application of dual-rare earth covalent organic framework hybrid material

A technology of covalent organic frameworks and hybrid materials, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as poor selectivity, low adsorption capacity, and slow adsorption speed, and achieve The effects of short equilibration time, large adsorption capacity and strong binding capacity

Active Publication Date: 2021-06-25
NANCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of low adsorption capacity, slow adsorption speed, and poor selectivity caused by the lack of clear and effective functional groups in the current quinolone antibiotic adsorbents, the present invention provides a preparation method of a double rare earth covalent organic framework hybrid material and its application in Application in the separation and enrichment of quinolone antibiotics, the material can simultaneously provide multiple forces such as electrostatic, coordination, and metal-metal electron transfer, and under the synergistic effect of multiple forces, the separation and enrichment efficiency of quinolone antibiotics is improved , has a good application prospect in the removal of quinolone antibiotics in wastewater

Method used

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  • Preparation method and application of dual-rare earth covalent organic framework hybrid material
  • Preparation method and application of dual-rare earth covalent organic framework hybrid material

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Embodiment 1

[0036] Example 1: Preparation method and property characterization of a double rare earth covalent organic framework hybrid material

[0037] (1) Preparation of sulfonic acid functionalized covalent organic framework: 126.1 mg of 2,4,6-triformylphloroglucinol, 169.4 mg of 2,5-diaminobenzenesulfonic acid, mesitylene and 1, 6 mL of 4-dioxane mixed solution (the volume ratio of mesitylene and 1,4-dioxane is 4:1) and 1.2 mL of acetic acid were added to a 50 mL pyrex tube, and the mixture was sonicated for 10 minutes, passed through three Freeze-pump-thaw cycle degassing, after the flame is sealed, put the Pyrex tube in an oven at 120°C for 3 days, cool to room temperature, centrifuge the product, and wash with tetrahydrofuran and N,N-dimethylformamide The precipitate was washed several times, and the precipitate was placed in a vacuum oven at 90°C for 12 hours to dry under vacuum to prepare a sulfonic acid functionalized covalent organic framework material (TpPa-SO 3 H);

[0038...

Embodiment 2

[0044] Example 2: Application of a double rare earth covalent organic framework hybrid material in the adsorption of quinolone antibiotics

[0045] Three quinolone antibiotic aqueous solutions, such as norfloxacin (NOR), ciprofloxacin (CIP), and enrofloxacin (ENR), were prepared with a concentration of 10-500ppm, and 5 mg of double rare earth covalent organic framework hybrid material Tb-Eu@TpPa-SO 3 H was added to 10mL aqueous solutions containing different concentrations of norfloxacin, ciprofloxacin, and enrofloxacin to construct an adsorption system, and the pH value of the solution was adjusted to 8.0 with sodium hydroxide solution, and the adsorption system was placed at a constant temperature of 25°C. Shake at a speed of 180rpm for 10 minutes in a shaking incubator; centrifuge, take the supernatant, pass through a 0.45 μm filter membrane, and use high performance liquid chromatography and high performance liquid chromatography-mass spectrometry to measure the impurities...

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Abstract

The invention discloses a preparation method and application of a dual-rare-earth covalent organic framework hybrid material, and belongs to the technical field of environmental protection. The preparation method comprises the steps: firstly, carrying out condensation reaction on 2,4,6-triformyl phloroglucinol and 2,5-diaminobenzene sulfonic acid to synthesize a sulfonic acid functionalized covalent organic framework, and hybridizing the sulfonic acid functionalized covalent organic framework as a parent with terbium ions and europium ions to prepare the dual-rare-earth covalent organic framework hybrid material. The prepared double-rare-earth covalent organic framework hybrid material is simple in method and good in thermal stability and chemical stability, multiple acting forces such as static electricity, coordination, metal-metal charge transfer and the like can be provided by introducing multiple recognition sites such as double-rare-earth ions and sulfonic acid groups, and under the synergistic effect of the multiple acting forces, The double-rare-earth covalent organic framework hybrid material has strong binding force and excellent selectivity to quinolone antibiotics, greatly improves the separation and enrichment efficiency, and can be used as an efficient adsorbent for the quinolone antibiotics in wastewater.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a preparation method and application of a double rare earth covalent organic framework hybrid material. Background technique [0002] In recent years, the increase of quinolone antibiotics in environmental water has attracted global attention. The presence of quinolone antibiotics has been detected in a variety of water environments. The limitations of traditional sewage treatment technology and illegal discharge have led to an increase in the concentration of quinolone antibiotics in environmental water ( Yi Luo, Lin Xu, Michal Rysz, Yuqiu Wang, Hao Zhang, Pedro J.J. Alvarez. Occurrence and Transport of Tetracycline, Sulfonamide, Quinolone, and Macrolide Antibiotics in the Haihe River Basin, China.Environ.Sci.Technol.2011, 45, 5, 1827-1833). Prolonged exposure to quinolone antibiotics can potentially promote the formation of drug resistance and produce biotox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/40C08G12/08B01J20/22C02F1/28C02F103/34
CPCB01J20/226C02F1/285C02F2103/343C08G12/08C08G12/40
Inventor 邱建丁姜伟梁汝萍
Owner NANCHANG UNIV
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