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Preparation method and application of water-stable triazinyl metal organic frame material

An organic framework and metal-based technology, applied in the field of preparation of water-stable triazine-based metal-organic framework materials, can solve the problems of complex steps, acid and alkali resistance, poor water stability, etc., and achieve simple preparation method, easy operation, good The effect of water stability

Active Publication Date: 2019-01-04
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are not many reports on the adsorption of heavy metal ions by MOFs. On the one hand, due to the poor water stability of most MOFs materials, they are not resistant to acid and alkali; Add functional groups again, such as amino, mercapto and thioether groups, etc., the steps are more complicated

Method used

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  • Preparation method and application of water-stable triazinyl metal organic frame material
  • Preparation method and application of water-stable triazinyl metal organic frame material
  • Preparation method and application of water-stable triazinyl metal organic frame material

Examples

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Embodiment 1

[0039] A method for preparing a water-stable triazine-based metal-organic framework material, comprising the steps of:

[0040] (1) Dissolve 136 μmol of 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine in a mixed solution of 6 mL DMF and 6 mL methanol;

[0041] (2) Continue to add 118.4 μmol of bismuth nitrate, stir fully for 30 minutes, then transfer to the polytetrafluoroethylene reactor; put the reactor into a 130°C oven and keep it warm for 44h to carry out the solvothermal reaction. At room temperature, vacuum filter, wash with DMF and methanol, and dry at 60°C for 12 hours to obtain a white powder that is CAU-7-TATB.

Embodiment 2

[0043] A method for preparing a water-stable triazine-based metal-organic framework material, comprising the steps of:

[0044] (1) Dissolve 136 μmol 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine in a mixed solution of 6 mL DMF and 9 mL methanol;

[0045](2) Continue to add 136 μmol of bismuth chloride, fully stir for 30 minutes, then transfer to the polytetrafluoroethylene reactor; put the reactor into a 150°C oven and keep warm for 40h to carry out the solvothermal reaction, after the reaction is completed, it will naturally drop to At room temperature, vacuum filter, wash with DMF and methanol, and dry at 50°C for 14 hours to obtain a white powder that is CAU-7-TATB.

Embodiment 3

[0047] A method for preparing a water-stable triazine-based metal-organic framework material, comprising the steps of:

[0048] (1) Dissolve 136 μmol of trimercapto-s-triazine in 6 mL of DMF and 7 mL of methanol mixed solution;

[0049] (2) Continue to add 90.6 μmol of bismuth oxide, stir fully for 30 minutes, and then transfer to the polytetrafluoroethylene reactor; put the reactor into a 140°C oven and keep it warm for 48 hours to carry out the solvothermal reaction. After the reaction is completed, it will naturally drop to Vacuum filter at room temperature, wash with DMF and methanol, and dry at 80°C for 10 hours to obtain a white powder that is CAU-7-TATB.

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Abstract

The invention relates to a preparation method of a water-stable triazinyl metal organic frame material, and belongs to the technical field of metal organic frame materials. The method comprises the following steps: dissolving bismuth metal salts and triazinyl organic acid in an organic solvent; and preparing by using a solvothermal method to obtain CAU-7-TATB, namely a metal organic frame materialformed by Bi and 2,4,6-tris(4-carboxy phenyl)-1,3,5-triazine. The triazinyl CAU-7-TATB synthesized by the solvothermal method has good water stability, and structural collapse and metal leakage cannot be caused even if the triazinyl CAU-7-TATB is placed in an aqueous solution for seven days; the water-stable triazinyl metal organic frame material is quite suitable for adsorbing heavy metal ions;and moreover, the CAU-7-TATB does not need to be modified later, and by N atoms on the triazinyl, an adsorption effect is played directly, and the water-stable triazinyl metal organic frame material has good adsorption effect on various heavy metal ions, and particularly has preferable and excellent selectivity on adsorption of lead ions.

Description

technical field [0001] The invention relates to the technical field of metal organic framework materials, in particular to a preparation method and application of a water-stable triazine-based metal organic framework material. Background technique [0002] A large number of heavy metal ions (such as Cr 3+ 、Co 2+ 、Ni 2+ , Mn 2+ and Pb 2+ ) leakage has caused serious water, soil and food pollution, while causing damage to the environment, it also threatens human health at all times. These toxic heavy metal ions, especially Pb 2+ , will be enriched in the brain, kidney and nervous system, causing damage to the body and dysfunction of the nervous system. Adsorption, as a common method to deal with heavy metal ions, has been well developed in recent years. Traditional adsorbents include humic acid, carbon adsorption materials, macromolecular materials, and mesoporous silica. Pores and considerable specific surface area, but its high consumption and poor metal ion selectivi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/226C02F1/285C02F2101/20
Inventor 黄柏标张若倩刘媛媛王泽岩张晓阳秦晓燕王朋郑昭科张倩倩
Owner SHANDONG UNIV
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