MOFs material capable of efficiently adsorbing precious metal palladium and preparation method of MOFs material

A precious metal, high-efficiency technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of harsh modification conditions, high cost, low amino group ratio, etc., to improve interface bonding, improve adsorption performance, and various effects.

Pending Publication Date: 2021-12-03
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing research basically uses organic ligands containing amino substituents as raw materials to synthesize amino-modified UiO series MOFs materials. Poor, harsh modification conditions and time-consuming, greatly limited for large-scale production

Method used

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  • MOFs material capable of efficiently adsorbing precious metal palladium and preparation method of MOFs material
  • MOFs material capable of efficiently adsorbing precious metal palladium and preparation method of MOFs material
  • MOFs material capable of efficiently adsorbing precious metal palladium and preparation method of MOFs material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of MOFs material that is used for adsorbing precious metal palladium, is mainly made of the raw material of following mass fraction:

[0039]The MOFs matrix material uses UiO-66 as 75 parts; the amino modifier uses polyethyleneimine (PEI) as 20 parts; the silane coupling agent uses KH550 as 5 parts.

[0040] The preparation method of the MOFs material for adsorbing noble metal palladium in the above-mentioned present embodiment specifically includes the following steps:

[0041] S1, alcoholysis of KH550: Take the KH550 in the above mass fraction and drop it into a beaker filled with ethanol, heat the beaker in a water bath at 55°C, and at the same time, magnetically stir the alcoholysis mixture for 5 hours.

[0042] S2, KH550 impregnation treatment: take the above-mentioned silane coupling agent that has been completely alcoholyzed and put it in a beaker, add UiO-66 matrix material, stir for 4 hours to fully contact KH550 and UiO-66; put the fully stirred and mix...

Embodiment 2

[0047] A kind of MOFs material that is used for adsorbing precious metal palladium, is mainly made of the raw material of following mass fraction:

[0048] The MOFs matrix material is UiO-68 for 65 parts; the amino modifier is polyetheramine (PEA) for 32 parts; the silane coupling agent is KH560 for 3 parts.

[0049] The preparation method of the MOFs material for adsorbing noble metal palladium in the above-mentioned present embodiment specifically includes the following steps:

[0050] S1, alcoholysis of KH560: take the above mass fraction of KH560 dropwise into a beaker filled with ethanol, heat the beaker in a water bath at 60°C, and at the same time, magnetically stir the alcoholysis mixture for 4 hours.

[0051] S2, KH560 impregnation treatment: take the above-mentioned silane coupling agent that has been completely alcoholysed and put it in a beaker, add UiO-68 matrix material, stir for 3 hours to make KH560 and UiO-68 fully contact; put the well-stirred and mixed KH560...

Embodiment 3

[0055] A kind of MOFs material that is used for adsorbing precious metal palladium, is mainly made of the raw material of following mass fraction:

[0056] The MOFs matrix material uses UiO-67 as 60 parts; the amino modifier uses triethylenetetramine (TETA) and tetraethylenepentamine (TEPA) as 20 parts and 18.5 parts respectively; the silane coupling agent uses KH570 as 1.5 parts.

[0057] The preparation method of the MOFs material for adsorbing noble metal palladium in the above-mentioned present embodiment specifically includes the following steps:

[0058] S1, alcoholysis of KH570: take the above mass fraction of KH570 dropwise into a beaker filled with ethanol, and place the beaker at 25°C to magnetically stir the above alcoholysis mixture for 1 hour.

[0059] S2, KH570 impregnation treatment: take the above alcoholysis complete silane coupling agent into a beaker, add UiO-67 matrix material, stir for 5 hours to fully contact KH570; put the fully stirred and mixed KH570 a...

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Abstract

The invention provides an MOFs material capable of efficiently adsorbing precious metal palladium. The MOFs material comprises the following components in parts by mass: 55-98 parts of an MOFs matrix material; 1-5 parts of a silane coupling agent; and 1-40 parts of an amino modifier. The invention further provides a preparation method of the efficient and low-cost MOFs material for adsorbing precious metal palladium, amino modification is conducted on the MOFs base material through more efficient and controllable dipping modification treatment, a low-cost modifier containing a large number of amino functional groups is introduced into the MOFs base material, meanwhile, a universal silane coupling agent is introduced to improve the interface bonding between the MOFs matrix and the amino modifier, and the MOFs material with efficient Pd (II) adsorption performance is prepared under optimized process conditions by regulating and controlling the dosage of the silane coupling agent and the modifier.

Description

technical field [0001] The invention relates to a MOFs material for efficiently adsorbing noble metal palladium and a preparation method thereof. Background technique [0002] Palladium is a very active noble metal among the platinum group metals, and it is an indispensable and important material in many fields such as electronics, catalysis, medicine, and jewelry. However, the natural resources of palladium in the earth's crust are extremely scarce and the price is very expensive, so it is of great significance to separate and recycle palladium. Adsorption is currently the mainstream method for palladium recovery, but traditional adsorbents such as activated carbon, zeolite, and silica gel have low adsorption capacity for Pd(II), and it is urgent to develop new adsorption materials with high adsorption capacity to achieve efficient recovery of Pd(II) . [0003] Metal organic frameworks (Metal Organic Frameworks, MOFs) is a multi-dimensional periodic network framework mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/32C22B11/00
CPCB01J20/226B01J20/3242C22B11/00
Inventor 宋国林李丘林芦英唐国翌于梦圆
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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