Amino acid functionalized metal-organic framework material and preparation method and application thereof

A metal-organic framework, amino acid technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of various raw material components, complicated modification operations, and reduced palladium recovery rate. The effect of good application and economic value, rich material sources, and simple preparation process

Active Publication Date: 2019-09-10
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The different forms of palladium in palladium-containing waste liquid is one of the important reasons for the decrease of palladium recovery rate
[0004] CN107130114A discloses a method for the separation and recovery of palladium in palladium-containing waste liquid, which adopts chitosan derivatives and palladium waste liquid to form flocs to realize the separation of palladium and waste liquid, and the above-mentioned method is more loaded down with trivial details
CN 109438719 A discloses a modified metal-organic framework composite material and a preparation method. This patent proposes the concept of using a metal-organic framework modified material as an adsorption material, but the modification operation of the metal-organic framework material used in the document Complex, with a wide variety of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation of an amino acid functionalized metal-organic framework material is performed according to the following process steps:

[0026] 1) Dissolve 10.1g of zirconium oxychloride octahydrate and 6.6g of trimesic acid in a mixed solvent composed of DMF (250mL) and formic acid (250mL), stir well and transfer the solution to a Teflon-equipped In a stainless-steel reaction kettle, the reaction was allowed to stand at 130°C for 2 days, cooled to room temperature, and then centrifuged. The obtained solid was sequentially washed with washing liquid DMF, water and acetone, and then vacuum-dried at 100°C for 12 hours.

[0027] 2) Dissolve 10g of glycine in 50mL of water to make a glycine solution;

[0028] 3) Add 3.6g MOF-808 to the solution prepared in step 2, ultrasonically disperse for 5 minutes, then transfer the dispersion to a stainless steel reaction kettle equipped with a polytetrafluoroethylene liner, and seal it at 80°C for 12 hours , and centrifuged, the obt...

Embodiment 2

[0030] The operation steps are the same as in Example 1, the difference is that methionine is used as the amino acid instead of glycine, and the preparation method of the amino acid solution is changed as follows: 5g of methionine is dissolved in a mixed solvent composed of 50mL of water and 30mL of DMF at 80°C to prepare a methionine solution, Finally, a metal-organic framework material functionalized with methionine was obtained.

Embodiment 3

[0032] The operation steps are the same as in Example 1, the difference is that histidine is used as an amino acid instead of glycine, and the preparation method of the amino acid solution is changed as follows: 6.5g of histidine is dissolved in 80mL of water at 80°C to prepare a histidine solution, Finally, a histidine-functionalized metal-organic framework material was obtained.

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PUM

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Abstract

The invention discloses an amino acid functionalized metal-organic framework material. The material includes an MOF-808 matrix and an amino acid ligand introduced at a node thereof. The modified metal-organic framework composite material can be used as an adsorbent, has a high adsorption rate for palladium ions and good selectivity to ions in solutions, and can achieve substantially unchanged adsorption performance after a plurality of times of repeated use. A preparation method of the material is also disclosed. A modifying raw material adopted in the method is amino acids which are rich in source, and a preparation process is extremely simple. The modified metal-organic framework composite material has a large potential in the field of palladium ion adsorption separation, and has good application and economic value.

Description

technical field [0001] The invention belongs to the field of separation, recovery and utilization of palladium ions, and in particular relates to an amino acid functionalized metal organic framework material and a preparation method and application thereof. Background technique [0002] Palladium is a platinum group metal that can be used in electroplating, catalysts, dental alloys, brazing alloys and various contact materials. It has unique physical and chemical properties and is widely used in chemical catalysis, aerospace, microelectronics technology, exhaust gas purification It plays a key and central role in cutting-edge science and modern industries such as petrochemical, electrical and electronic, environmental protection, biopharmaceuticals, and national defense. With the increasing importance of environmental protection and the in-depth development and application of catalysts, the demand for metal palladium is growing rapidly. Facing the sustainable utilization of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28
CPCB01J20/226C02F1/285
Inventor 李敏江欣悦冯建李欢蒋松山孟晓静肖鹏
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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