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Ligand-exchanged hollow MIL-101 metal organic framework material as well as preparation method and application thereof

A metal-organic framework and ligand exchange technology, applied in the field of materials science, can solve problems such as accumulation of toxic substances, and achieve the effect of improving the total adsorption capacity and the water vapor adsorption capacity.

Active Publication Date: 2022-06-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, excessive use of preservatives may lead to bioaccumulation of toxic substances; heat treatment and irradiation, while reducing microbial growth, inevitably promote food ripening; storage under controlled atmospheres requires large facilities with a constant gas supply, which practically impractical in some regions
[0006]At present, there is no report on the use of the rapid water absorption and desorption capacity of MOFs materials to adjust the humidity and finally realize the freshness preservation function of fruits and vegetables

Method used

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  • Ligand-exchanged hollow MIL-101 metal organic framework material as well as preparation method and application thereof
  • Ligand-exchanged hollow MIL-101 metal organic framework material as well as preparation method and application thereof
  • Ligand-exchanged hollow MIL-101 metal organic framework material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Weigh chromium nitrate nonahydrate (0.8g) and terephthalic acid (0.22g) in a polytetrafluoroethylene liner, then add deionized water (20ml) for ultrasonic dispersion for 10min, and then place it in a reactor It was sealed and reacted in a preheated oven at 180°C for 4 hours. After cooling, the product was centrifuged (10000rpm, 10min) and washed with N,N'-dimethylformamide (DMF) and deionized water, respectively. Three times, MIL-101 metal-organic framework materials were obtained.

[0054] (2) The above MIL-101 was redispersed in deionized water (40ml), then acetic acid (2ml) was added and dispersed uniformly by ultrasonic, then the suspension was transferred to a polytetrafluoroethylene liner and sealed, placed in a preheated The reaction was carried out at 180°C for 4 hours in an oven. After cooling, the product was centrifuged (10000rpm, 10min), washed three times with DMF and deionized water, and finally vacuum-dried at 80°C for 12 hours to obtain a hollow MIL-...

Embodiment 2 and 3

[0076] (1) Weigh chromium nitrate nonahydrate (0.8g) and terephthalic acid (0.22g) in a polytetrafluoroethylene liner, then add deionized water (20ml) for ultrasonic dispersion for 10min, and then place it in a reactor It was sealed and reacted in a preheated oven at 180°C for 4 hours. After cooling, the product was centrifuged (10000rpm, 10min) and washed with N,N'-dimethylformamide (DMF) and deionized water, respectively. Three times, MIL-101 metal-organic framework materials were obtained.

[0077] (2) The above MIL-101 was redispersed in deionized water (40ml), then acetic acid (2ml) was added and dispersed uniformly by ultrasonic, then the suspension was transferred to a polytetrafluoroethylene liner and sealed, placed in a preheated The reaction was carried out at 180°C for 3 hours in an oven. After cooling, the product was centrifuged (10000rpm, 10min), washed three times with DMF and deionized water, and finally vacuum-dried at 80°C for 12 hours to obtain a hollow MIL-...

Embodiment 4 and 5

[0080] (1) Weigh chromium nitrate nonahydrate (0.8g) and terephthalic acid (0.22g) in a polytetrafluoroethylene liner, then add deionized water (20ml) for ultrasonic dispersion for 10min, and then place it in a reactor It was sealed and reacted in a preheated oven at 180°C for 4 hours. After cooling, the product was centrifuged (10000rpm, 10min) and washed with N,N'-dimethylformamide (DMF) and deionized water, respectively. Three times, MIL-101 metal-organic framework materials were obtained.

[0081] (2) The above MIL-101 was redispersed in deionized water (40ml), then acetic acid (2ml) was added and dispersed uniformly by ultrasonic, then the suspension was transferred to a polytetrafluoroethylene liner and sealed, placed in a preheated The reaction was carried out at 180°C for 3 hours in an oven. After cooling, the product was centrifuged (10000rpm, 10min), washed three times with DMF and deionized water, and finally vacuum-dried at 80°C for 12 hours to obtain a hollow MIL-...

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Abstract

The invention discloses a 1, 1 '-ferrocene dicarboxylic acid ligand exchanged hollow MIL-101 metal organic framework material as well as a preparation method and application thereof, the preparation method comprises the following steps: (1) preparing an MIL-101 metal organic framework material, and performing acid etching on the MIL-101 metal organic framework material to obtain the hollow MIL-101 metal organic framework material; and (2) dispersing the hollow MIL-101 metal organic framework material and 1, 1 '-ferrocenedicarboxylic acid into a solvent, adding acetic acid, uniformly mixing to form a suspension, reacting at 80-160 DEG C for 6-24 hours, cooling, centrifuging, washing and drying to obtain the hollow MIL-101 metal organic framework material exchanged by the 1, 1'-ferrocenedicarboxylic acid ligand. The ligand-exchanged hollow MIL-101 metal organic framework material has the characteristics of large specific surface area, high water adsorption capacity, rapid adsorption and desorption kinetics, excellent light absorption and photothermal conversion capability, outstanding antibacterial performance and the like, and can be used in the fields of solar-driven atmospheric water collection, fruit and vegetable preservation, intelligent sterilization and the like.

Description

technical field [0001] The invention relates to the technical field of material science, in particular to a hollow MIL-101 metal-organic framework material exchanged with 1,1'-ferrocene dicarboxylic acid ligands and a preparation method and application thereof. Background technique [0002] Metal-organic frameworks (MOFs) are one-dimensional, two-dimensional or three-dimensional porous materials formed by coordination bonding of metal ions or clusters and organic chains. Due to its high porosity, large specific surface area, pore size, and tunable functional properties, the material has been widely used in gas adsorption and separation, biomedicine, removal of heavy metals and toxic dyes, energy storage and conversion, catalysis and other fields. [0003] In recent years, metal-organic frameworks, as one of the most promising adsorbents, have been extensively studied in the field of solar-driven atmospheric water harvesting. Solar energy is a ubiquitous, clean and renewabl...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22
CPCC08G83/008B01J20/226Y02A20/00
Inventor 彭新生胡月
Owner ZHEJIANG UNIV
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