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Two-dimensional nitrogen-doped magnetic ionic liquid zeolite imidazate nano material and preparation method and application thereof

The technology of a magnetic ionic liquid and zeolite imidazolate is applied in the field of nanomaterials, which can solve the problems of time-consuming and complicated operation, and achieve the effects of convenient separation, large specific surface area, rich and diverse functional groups of materials

Inactive Publication Date: 2019-08-02
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved: Due to the time-consuming and complicated operation of traditional adsorption and extraction methods, this material introduces Fe 3 o 4 As a source of magnetism, the load on the ZIFs material, on the one hand, makes the ZIF material magnetic and easy to recycle; on the other hand, the small magnetic nanoparticles increase the specific surface area of ​​the ZIFs material, making it have a wider range of applications and prospects.

Method used

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  • Two-dimensional nitrogen-doped magnetic ionic liquid zeolite imidazate nano material and preparation method and application thereof
  • Two-dimensional nitrogen-doped magnetic ionic liquid zeolite imidazate nano material and preparation method and application thereof
  • Two-dimensional nitrogen-doped magnetic ionic liquid zeolite imidazate nano material and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] One-step preparation method of MILZIF magnetic nanoparticles

[0023] Accurately weigh 0.3019g ZIF-8 and place it in 50mL ultrapure water, ultrasonically disperse ZIF-8 in ultrapure water for 1 hour, then add 2.0405g bromo-1-hexyl-3 methylimidazole and 2.2511g 1-hexyl -3 Methylimidazole tetraferric chloride, continue ultrasonication for 2 hours to mix evenly, transfer the above mixed solution to a 250mL four-neck flask, 2 Add 0.8775g FeSO under protection and high-speed stirring 4 •7H 2 O, at the same time, add 5mL of 25% ammonia water dropwise, stir at room temperature for 3h, collect the black magnetic microspheres with a magnet, then alternately wash 3 times with absolute ethanol and deionized water, dry in vacuum at 105°C for 12h, and obtain 0.7074g MILZIF after grinding . The remaining ionic liquid was purified by rotary evaporation and reused.

Embodiment 2

[0025] Accurately weigh 0.4027g ZIF-8 and place it in 50mL ultrapure water, ultrasonically disperse ZIF-8 in ultrapure water for 1 hour, then add 2.0350g bromo-1-hexyl-3 methylimidazole and 2.2506g 1-hexyl -3 Methylimidazole ferric chloride salt, continue ultrasonication for 2 hours to mix evenly, transfer the above mixed solution to a 250mL four-necked flask, 2 Add 0.8750g FeSO under protection and high-speed stirring 4 •7H 2 O, at the same time, add 5mL of 25% ammonia water dropwise, stir at room temperature for 3h, collect the black magnetic microspheres with a magnet, then alternately wash with absolute ethanol and deionized water for 3 times, vacuum dry at 105°C for 12h, and obtain 0.7486g after grinding MILZIF. The remaining ionic liquid was purified by rotary evaporation and reused. The remaining ionic liquid was purified by rotary evaporation and reused.

Embodiment 3

[0027] Accurately weigh 0.6022g ZIF-8 and place it in 100mL ultrapure water, ultrasonically disperse ZIF-8 in ultrapure water for 1 hour, then add 4.0792g bromo-1-hexyl-3 methylimidazole and 4.5071g 1-hexyl -3 Methylimidazolium tetrachloride ferric salt, continue ultrasonication for 2 hours to mix evenly, transfer the above mixed solution to a 250mL four-necked flask, add 1.7551g FeSO under N2 protection and high-speed stirring 4 •7H 2 O, at the same time, add 10mL of 25% ammonia water dropwise, stir at room temperature for 3h, collect the black magnetic microspheres with a magnet, then alternately wash 3 times with absolute ethanol and deionized water, dry in vacuum at 105°C for 12h, and obtain 1.4786g MILZIF after grinding . The remaining ionic liquid was purified by rotary evaporation and reused.

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Abstract

The invention discloses a two-dimensional nitrogen-doped magnetic ionic liquid zeolite imidazate nano material and a preparation method and application thereof. The preparation method comprises the following steps: weighing ZIF-8, placing ZIF-8 in ultrapure water, carrying out ultrasonic dispersion uniformly, adding bromo-1-hexyl-3methylimidazole and 1-hexyl-3methylimidazole ferric chloride, keeping ultrasonic homogenization, adding FeSO4-7H2O into the mixed solution under the protection of N2 and high-speed stirring, simultaneously adding ammonia water and stirring, collecting black magneticmicrospheres by using a magnet, washing, carrying out vacuum drying, and grinding to obtain MILZIF. The synthetic method of the porous magnetic core-shell structure material synthesized by the invention is rapid by one step, and a traditional method of constructing a magnetic core at first and then constructing nano material particles on the surface is not required. A bisimidazole group is constructed through combination of ZIF-8 and IL, so that the functional groups of the material are abundant and diversified. The prepared material has magnetism and larger specific surface area, and meanwhile, is convenient to separate and recycle.

Description

technical field [0001] The invention belongs to the field of nanomaterials, and in particular relates to a two-dimensional nitrogen-doped magnetic ionic liquid zeolite-like imidazolate nanomaterial and a preparation method and use thereof. Background technique [0002] Zeolitic imidazolate frameworks (ZIFs) are a class of metal-organic frameworks with a zeolite framework structure. Compared with traditional zeolites, transition metal ions replace silicon and aluminum elements in traditional zeolites, imidazolate replaces oxygen bridges in traditional zeolites, and connects through nitrogen atoms on imidazole rings to form a new zeolite-like structure material . Therefore, ZIF materials combine the dual advantages of metal-organic framework materials and traditional zeolite materials. At the same time, they have high porosity and large specific surface area of ​​MOFs materials, and have the characteristics of high stability of zeolite materials, so that this material can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/22B01J20/30B82Y40/00B82Y30/00C02F1/28C02F101/34C02F101/38
CPCB01J20/28009B01J20/28007B01J20/06B01J20/28057B01J20/16B01J20/22B01J20/28016B82Y40/00B82Y30/00C02F1/281C02F1/285C02F2101/38C02F2101/34C02F2305/08
Inventor 高仕谦邵子纯吴怡秋严雨濛张占恩卢建王俊霞徐蕊
Owner SUZHOU UNIV OF SCI & TECH
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