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A kind of adsorbable heavy metal ion MOF material and preparation method thereof

A technology for adsorbing heavy metals and heavy metal ions, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as poor heavy metal ion adsorption performance, achieve good adsorption effect, easy to manufacture, and improve roughness degree of effect

Active Publication Date: 2022-05-03
GUILIN UNIVERSITY OF TECHNOLOGY +1
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Problems solved by technology

[0005] The present invention mainly aims at the technical problem that MOF materials have poor adsorption performance on heavy metal ions in the prior art, and provides a MOF material capable of adsorbing heavy metal ions and a preparation method thereof; it is modified by metal ion doping oxidation method, Prepared a modified heavy metal ion adsorption material and applied it to adsorb heavy metal ions such as cadmium in wastewater

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  • A kind of adsorbable heavy metal ion MOF material and preparation method thereof
  • A kind of adsorbable heavy metal ion MOF material and preparation method thereof
  • A kind of adsorbable heavy metal ion MOF material and preparation method thereof

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Embodiment 1

[0039] This embodiment provides a method for preparing MOF materials capable of adsorbing heavy metal ions,

[0040] Preparation of Zn-MOF:

[0041] 1,3-bis(4-pyridyl)propane, 2,5-dihydroxyterephthalic acid and Zn(NO 3 ) 2 ·6H 2 O was dissolved in a mixed solution of distilled water and DMF with a volume ratio of 2:1, the concentrations of which were 9 mg / mL, 6 mg / mL and 0.025 mol / L, and stirred evenly, then placed in a polytetrafluoroethylene autoclave, React at a constant temperature of 150°C for 24 hours, and drop to 25°C at a rate of 5°C / h to obtain the MOF material——brown block crystal Zn-MOF. The monomer structure diagram is shown in Figure 4 .

[0042] Preparation of K-Zn-MOF:

[0043] 1) Weigh the Zn-MOF material and potassium permanganate according to the mass ratio of 8:3, and then use the grinding method to mix and grind for 10 minutes;

[0044] 2) Pour it into a 100mL beaker after mixing and grinding evenly, then add 50mL of distilled water into it, raise th...

Embodiment 2

[0060] This embodiment provides a method for preparing MOF materials capable of adsorbing heavy metal ions,

[0061] Preparation of La-MOF:

[0062] 2,5-dihydroxyterephthalic acid, 1,3-bis(4-pyridyl)propane and La(NO 3 ) 3 ·6H 2 O was dissolved in distilled water with concentrations of 10mg / mL, 9.9mg / mL and 0.05mol / L respectively. After stirring evenly, it was placed in a polytetrafluoroethylene autoclave and placed in a closed oven at a constant temperature of 140°C. Under the same conditions, the reaction was carried out for 50 h, and the temperature was lowered to 25 °C at a rate of 5 °C / h to obtain a colorless bulk crystal La-MOF.

[0063] Preparation of K-La-MOF:

[0064] 1) Weigh the La-MOF material and potassium permanganate according to the mass ratio of 8:3, and then use the grinding method to mix and grind for 10 minutes;

[0065] 2) Pour it into a 100mL beaker after mixing and grinding evenly, then add 50mL of distilled water into it, raise the temperature to 5...

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Abstract

The invention mainly relates to the technical field of metal-organic framework materials, specifically a MOF material capable of absorbing heavy metal ions and a preparation method thereof. The MOF material is oxidatively modified by doping potassium permanganate, on the one hand, the roughness of the MOF material can be improved , so as to enhance its adsorption performance; on the other hand, K + and the Mn generated by the redox reaction 2+ At the same time, it is loaded on the surface of the MOF material to further enhance its adsorption performance. The modified heavy metal ion adsorption material in the present invention has a good removal effect on heavy metal ions in waste water and can be recycled. The invention has the advantages of simple operation, low cost, easy control of chemical components, good repeatability and high output, and simultaneously has the advantages of simple structure, reasonable design and easy manufacture.

Description

technical field [0001] The invention mainly relates to the technical field of metal-organic framework materials, in particular, to a MOF material capable of absorbing heavy metal ions and a preparation method thereof. Background technique [0002] At present, the biggest environmental problem caused by acid mine wastewater is heavy metal pollution, among which cadmium pollution is particularly serious. Cadmium ions entering the human body can easily cause certain damage to human immune, nervous and reproductive systems. The most common method for removing heavy metal ions in water is adsorption, so the choice of adsorbent is particularly important. Metal-organic framework (MOF) is a newly emerging adsorption material. There are many reports on its synthesis and more and more reports on its use as an adsorbent. [0003] During the research, the researchers found that a single MOF material has certain limitations in the adsorption of heavy metal ions, so it is necessary to mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/226C02F1/285C02F2101/20
Inventor 肖瑜陈钊张子龙郑潇沈铭琳谢名淇
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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