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Mesoporous chromium-based metal-organic framework compound hollow microspherical shell loaded with nanoscale silver element and preparation method thereof

An organic framework and nanoscale technology, applied in the field of mesoporous chromium-based metal-organic framework compound hollow microsphere shells, can solve the problems of poor stability of Fe-based MOF, affecting the photocatalytic efficiency of catalysts, affecting the recycling of photocatalysts, etc., to achieve high Effects of degradation efficiency, increased photocatalytic active sites, and good cycle stability

Active Publication Date: 2022-05-06
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the composite material obtained in this patent, the stability of Fe-based MOF in water is poor, and there is a physical combination between AgI and mesoporous Fe-based MOF, which will affect the recycling of photocatalysts.
At the same time, in the composite material, the combined AgI particle size is large, which will affect the photocatalytic efficiency of the catalyst

Method used

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  • Mesoporous chromium-based metal-organic framework compound hollow microspherical shell loaded with nanoscale silver element and preparation method thereof
  • Mesoporous chromium-based metal-organic framework compound hollow microspherical shell loaded with nanoscale silver element and preparation method thereof
  • Mesoporous chromium-based metal-organic framework compound hollow microspherical shell loaded with nanoscale silver element and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] In this example, nano-Ag@mesoporous Cr-MIL-101 microsphere shells were prepared according to the following steps:

[0037] (1) Add 2.0 g of emulsifier polyvinylpyrrolidone into 100.0 mL of deionized water, and then add 0.16 g of pH regulator ammonium bicarbonate; raise the temperature to 40°C, and feed nitrogen at the same time; after passing nitrogen for 30 minutes, add 1.0 mL of acrylic acid and 15.0mL of styrene monomer mixture; continue to heat up to 70°C, add 0.17g of initiator ammonium persulfate, stir and react at a constant temperature for 12 hours under reflux, and the stirring speed is 200r / min; after the reaction is completed, cool to room temperature, the resulting suspension After centrifugation, washing with ethanol, and drying at 60°C for 12 hours, the resulting powder was ground evenly, and polystyrene microspheres PS-COOH with carboxyl functional groups were obtained.

[0038] (2) Disperse 0.2 g of PS-COOH in 30.0 mL of deionized water, and then add 0.5...

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Abstract

The invention discloses a mesoporous chromium-based metal-organic framework compound hollow microspherical shell loaded with nanoscale silver simple substance and a preparation method thereof. Ag simple substance. The present invention is beneficial to solve the problems that MOFs materials are mostly micropores (d<2nm) in diameter and photogenerated charges are easy to recombine, which limits their application in the field of adsorption and photocatalytic degradation. The mesoporous spherical shell structure also improves the absorption effect of the material on incident light , thereby enhancing the photocatalytic activity.

Description

technical field [0001] The invention belongs to the technical field of metal-organic framework (MOFs) synthesis, and specifically relates to a mesoporous chromium-based metal-organic framework compound hollow microsphere shell (nano-Ag@mesoporous Cr-MIL-101 shell) loaded with nano-scale silver simple substance and Its preparation and application. Background technique [0002] Photocatalysis is a green chemical technology that can be applied in solar hydrogen production, degradation of pollutants, and selective organic synthesis. In recent years, photocatalytic degradation of pollutants in water has attracted widespread attention because the final products are some harmless substances such as carbon dioxide and water. [0003] Metal-organic frameworks (MOFs) are a class of crystalline polymers formed by coordination reactions between metal ions (or clusters) and organic multidentate ligands. Due to the infinite variety of ligands and the diversity of ligands and metal ion co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J23/50B01J35/08C02F1/30C02F101/38
CPCB01J35/004B01J31/2243B01J23/50C02F1/30B01J35/08B01J2531/62C02F2305/10C02F2101/38
Inventor 刘雪霆朱洪程吴晶晶
Owner HEFEI UNIV OF TECH
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