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Thiol functionalization method and application of nano hole metal-organic framework material

An organic framework, nano-hole technology, applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of weak interaction and weak adsorption capacity of heavy metal ions, etc.

Inactive Publication Date: 2013-03-06
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although nanoporous MOFs have strong adsorption capacity for organic compounds (such as organic dye molecules, polycyclic aromatic hydrocarbons, etc.) and gas molecules (such as hydrogen, carbon dioxide, carbon monoxide, etc.), their adsorption capacity for heavy metal ions is very poor. Weak, which is due to the weak interaction between nanoporous MOFs and these heavy metal ions

Method used

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  • Thiol functionalization method and application of nano hole metal-organic framework material
  • Thiol functionalization method and application of nano hole metal-organic framework material
  • Thiol functionalization method and application of nano hole metal-organic framework material

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Experimental program
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Effect test

Embodiment 1

[0024] Unmodified nanoporous [Cu 3 (BTC) 2 (H 2 O) 3 ] n The metal-organic framework material was synthesized with reference to the method provided by Chui S.S.-Y. et al. in Science 1999, No. 283, pp. 1148-1150. Weigh 1.087g of copper nitrate trihydrate, dissolve it in 15ml of water, then weigh 0.525g of 1,3,5-benzenetricarboxylic acid, dissolve it in 15ml of ethanol, mix the two solutions and continue to stir for 30 minutes, then mix all The solution was transferred into an autoclave, and reacted at 120 degrees Celsius for 12 hours. The blue product was filtered, washed with water, and then washed with ethanol, and then put into a drying oven to dry at 150 degrees Celsius for 4 hours. The obtained product was characterized by powder X-ray diffraction, and its structure was consistent with the nanoporous metal-organic framework material [Cu 3 (BTC) 2 (H 2 O) 3 ] n exactly the same (see figure 1 (a)).

[0025] The nanopores [Cu 3 (BTC) 2 (H 2 O) 3 ] n The metal-...

Embodiment 2

[0028] Take by weighing the nano hole [Cu] made in embodiment 1 3 (BTC) 2 ] n Metal-organic framework material 0.1g, disperse it in 10ml of anhydrous toluene, add 1.0ml of prepared 0.24mol / L ethanedithiol in the family, stir at room temperature for 24 hours, after the product is filtered, ethanol (15ml×5) was washed, and vacuum-dried at room temperature (vacuum degree 0.1MPa) for 12 hours. The prepared mercapto-functionalized nanopores [Cu 3 (BTC) 2 ] n Metal-organic frameworks were characterized by powder X-ray diffraction (see figure 1 (c)), its structure is similar to that of the nanoporous metal-organic framework [Cu 3 (BTC) 2 (H 2 O) 3 ] n Exactly the same; its BET specific surface area was determined to be 331m 2 / g, pore volume 0.18cm 3 / g, the pore size distribution is determined to be 0.4-0.7nm; its infrared spectrum ( image 3 (b)) proves that there are two kinds of thiol functional groups in the ethanedithiol molecule, namely: the thiol that coordinates...

Embodiment 3

[0030] Take by weighing the nano hole [Cu] made in embodiment 1 3 (BTC) 2 ] n Metal-organic framework material 0.1g, disperse it in 10ml of anhydrous toluene, add 1.5ml of prepared 0.24mol / L ethanedithiol, and stir at room temperature for 24 hours, after the product is filtered, ethanol (15ml×5) was washed, and vacuum-dried at room temperature (vacuum degree 0.1MPa) for 12 hours. The prepared mercapto-functionalized nanopores [Cu 3 (BTC) 2 ] n Metal-organic frameworks were characterized by powder X-ray diffraction (see figure 1 (d)), its X-ray diffraction and reported nanoporous metal-organic frameworks [Cu 3 (BTC) 2 (H 2 O) 3 ] n It is weaker than that; its BET specific surface area has been determined to be 80m 2 / , pore volume 0.18cm 3 / g, the pore size distribution is determined to be 0.4-0.7nm; its infrared spectrum ( image 3 (c)) proves that there are two kinds of thiol functional groups in the ethanedithiol molecule, namely: the thiol that coordinates with...

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Abstract

The invention relates to a thiol functionalization method and application of a nano hole metal-organic framework material. Through the coordination of the nano hole metal-organic framework material containing a coordination unsaturated active site and a dithiol compound, a certain proportion of thiol in a dithiol compound molecule is connected with the coordination unsaturated active site of the nano hole metal-organic framework material through a coordination bond, and a thiol functional group is grafted to a metal-organic framework, so that the thiol-functionalized nano hole metal-organic framework material is generated. The thiol-functionalized nano hole metal-organic framework material can be used as an adsorption and separation material of heavy metal ions, and is applied to removal of heavy metal ions in a water body.

Description

technical field [0001] The invention belongs to a sulfhydryl functionalization method of a nano-hole metal-organic framework material and its application in removing heavy metal ions. Background technique [0002] Nanoporous metal-organic framework materials are a new class of porous materials that have developed rapidly in recent years. This type of material is composed of transition metals and organic ligands as basic components and mainly assembled through coordination bonds. Compared with traditional inorganic porous materials such as zeolites, metal-organic framework materials have the characteristics of diverse structures, unique properties, simple synthesis methods, and mild synthesis conditions. At the same time, this type of material has broad application prospects in many fields such as catalysis, adsorption, ion exchange, selective separation and new sensors. There have been many literature reports on the synthesis of such materials, such as Kitagawa S. et al. in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D15/00
Inventor 裘灵光柯飞姜霞
Owner ANHUI UNIVERSITY
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