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Loading method of ZIFs on silicon substrate, silicon substrate material and application of silicon substrate material

A matrix material and matrix technology, applied in chemical instruments and methods, other chemical processes, etc., to achieve the effects of controllable thickness, large selection randomness, and good load uniformity

Inactive Publication Date: 2017-12-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Precisely controlling the thickness of loaded ZIFs in the channels of mesoporous materials has not been reported so far.

Method used

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  • Loading method of ZIFs on silicon substrate, silicon substrate material and application of silicon substrate material
  • Loading method of ZIFs on silicon substrate, silicon substrate material and application of silicon substrate material
  • Loading method of ZIFs on silicon substrate, silicon substrate material and application of silicon substrate material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare solid silicon spheres with a diameter of 400 nm by the Stober method, weigh 1 g of silicon spheres in a 100 mL round-bottomed flask, add 40 mL of HCl with a mass concentration of 10%, reflux at 95 ° C for 8 h, filter with suction, water and dry Wash with water and ethanol until neutral, and dry at 100°C for 24 hours for later use.

[0030] Add 1 g of vacuum-dried acidified silicon spheres to a 100 mL three-necked flask, add 40 mL of dry toluene and 1 mL of N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole , after ultrasonic or vacuum degassing, at N 2 Reflux reaction at 109°C for 24 hours under the protection of the protection, suction filtration, first wash with dry toluene 3 times, wash with acetone and acetonitrile once, and vacuum dry at 60°C overnight to obtain derivatized silicon spheres.

[0031] Prepare 0.168mol / L methanol solution of zinc nitrate and 1.21mol / L methanol solution of 2-methylimidazole.

[0032] Weigh 0.4g of derivatized silicon spheres i...

Embodiment 2

[0035] Prepare SBA-15 with a pore diameter of about 15 nm by adding n-hexane as a pore-enlarging agent, weigh 1 g of SBA-15 in a 100 mL round bottom flask, add 50 mL of 10% HCl and reflux at 95 °C for 8 h , filtered with suction, washed with water and absolute ethanol until neutral, and dried at 100°C for 24h.

[0036] Add 1 g of activated SBA-15 dried in vacuum to a 100 mL three-necked flask, add 40 mL of dry toluene and 1 mL of N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole, After ultrasonic or vacuum degassing, in N 2 Reflux reaction at 109°C for 24h under the protection of the protection, suction filtration, washing with dry toluene 3 times, and washing with acetone and acetonitrile once respectively, and vacuum drying at 60°C overnight to obtain the derivatized SBA-15.

[0037] Prepare 0.168mol / L methanol solution of zinc nitrate and 1.21mol / L methanol solution of 2-methylimidazole.

[0038] Weigh 0.2g of derivatized SBA-15 and a 50mL round bottom flask, add 10mL of ...

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Abstract

The invention provides a novel loading method of zeolite-like imidazole ester skeleton structural materials (ZIFs) on a silicon substrate and an application of the prepared material. The silicon substrate such as silicon spheres, ordered mesoporous silicon SBA-15, CMC-41, CMC-48, KT96, chromatography silica gel, capillary and the like is activated, then the activated silicon substrate is derivated, and the surface of the substrate is allowed to contain groups coordinated with metal ions; then a corresponding metal salt and imidazole are respectively dissolved in water, methanol, DMF, THF and other polar solvents to form clarified uniform solutions, and the ZIFs are grafted on the outer surface of the silicon substrate or in pore passages by a layer-by-layer self-assembly method. The invention provides the preparation method of the silicon-based ZIFs loaded material having the advantages of no needing of high temperature and high pressure treatment, stable and uniform loading and controllable thickness. The material prepared by the method has important application potential in the aspects of separation and analysis, adsorption, enrichment, purification and the like.

Description

technical field [0001] The invention relates to a method for loading ZIFs (zeolite-like imidazolate framework materials) on a silicon substrate. The material prepared by this method can be applied to chromatographic separation and the adsorption, enrichment and purification of pollutants, etc., and belongs to Separation analysis and new materials field. Background technique [0002] Metal-organic framework (MOF), also known as mesoporous coordination polymer, is a microporous network framework formed by the complexation of transition metals or metal clusters and organic ligands. It is a promising new functional organic -Inorganic hybrid crystal materials can be used in many fields such as gas storage, drug loading, molecular recognition, selective catalysis, ion exchange, biosensing, optoelectronic materials, magnetic materials and chips. MOF has a large specific surface area, unsaturated metal coordination, specific size, and shape-controllable pores, and a wide range of o...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30
Inventor 陈吉平彭俊钰孙晓丽王金成黄超囡孙昊
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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