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Lanthanum-doped metal organic framework material as well as preparation method and application thereof

A metal-organic framework and framework material technology, which is applied in the field of lanthanum-doped metal-organic framework materials and its preparation, can solve the problems of limited adsorption sites and phosphate adsorption capacity, and achieve easy operation, excellent recycling performance, The effect of improving the adsorption capacity

Active Publication Date: 2018-03-06
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption method is limited due to the limited adsorption sites of the existing adsorption materials, and the adsorption capacity for phosphate is also limited.

Method used

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  • Lanthanum-doped metal organic framework material as well as preparation method and application thereof
  • Lanthanum-doped metal organic framework material as well as preparation method and application thereof
  • Lanthanum-doped metal organic framework material as well as preparation method and application thereof

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preparation example Construction

[0024] The present invention provides a preparation method of lanthanum-doped metal organic framework material, which comprises the following steps:

[0025] (1) Crosslinking reaction of zirconium tetrachloride and terephthalic acid in N,N dimethylformamide to obtain a basic framework material;

[0026] (2) Reacting the basic framework material and lanthanum chloride heptahydrate to obtain a lanthanum-doped metal organic framework material.

[0027] In the preparation method of the present invention, all raw materials used are commercially available products that are well known to those skilled in the art, and will not be described in detail below.

[0028] In the present invention, zirconium tetrachloride and terephthalic acid are reacted in N,N dimethylformamide to obtain a basic framework material. In the present invention, the ratio of the amount of the zirconium tetrachloride and terephthalic acid is preferably (1 to 3):1, more preferably (1 to 2):1; the zirconium tetrachloride ...

Embodiment 1

[0044] a. Dissolve 4mmol of zirconium chloride and 4mmol of terephthalic acid in 100ml of N,N-dimethylformamide, sonicate at 70Hz for 30min to fully dissolve the reaction, and obtain the primary basic framework material (primary UIO-66) The uniformly mixed a solution;

[0045] b. Weigh 1.41 mmol of lanthanum chloride heptahydrate and add it to the solution a, and then perform ultrasonic treatment at a frequency of 70 Hz for 30 minutes to obtain a uniformly mixed solution b;

[0046] c. Transfer solution b to an autoclave and react in a high temperature environment of 120°C for 48 hours;

[0047] d. Separate the product through a centrifuge, first wash with methanol and acetonitrile along with the product, then wash with deionized water, and finally dry in a vacuum at 30°C for a total of 12 hours to obtain La-UIO-66.

Embodiment 2

[0049] a. Dissolve 8mmol of zirconium chloride and 4mmol of terephthalic acid in 100ml of N,N-dimethylformamide, sonicate at 70Hz for 30min to fully dissolve the reaction, and obtain the primary basic framework material (UIO-66) A uniformly mixed solution;

[0050] b. Weigh 8mmol of lanthanum chloride heptahydrate and add it to solution a, and then perform ultrasonic treatment at a frequency of 70 Hz for 30 minutes to obtain a uniformly mixed solution b;

[0051] c. Transfer solution b to an autoclave and react for 48h in a high temperature environment of 115°C;

[0052] d. Separate the product through a centrifuge, first wash with methanol and acetonitrile along with the product, then wash with deionized water, and finally dry in a vacuum at 30°C for a total of 12 hours to obtain La-UIO-66.

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Abstract

The invention provides a preparation method of a lanthanum-doped metal organic framework material. The preparation method comprises the following steps: firstly, fully reacting zirconium tetrachloridewith terephthalic acid to generate a base framework material; preferably reacting lanthanum chloride heptahydrate with the terephthalic acid while avoiding the reaction of the lanthanum chloride heptahydrate and the base framework material. The invention provides the lanthanum-doped metal organic framework material and application thereof in adsorption of phosphate radical. The lanthanum-doped metal organic framework material has two adsorption sites of zirconium ions and lanthanum ions which can be used for well adsorbing the phosphate radical. The results of the embodiment show that the maximal adsorption capacity of the lanthanum-doped metal organic framework material to the phosphate radical is 348.43mg / g; in the presence of more heteroions, the recognition of the phosphate radical can be maintained; after repeated use for five times, the adsorption capacity of La-UIO-66 to the phosphate radical is also kept at 100 percent; the lanthanum-doped metal organic framework material hasexcellent stability and recycling performance.

Description

Technical field [0001] The invention relates to the technical field of organic framework materials, in particular to a lanthanum-doped metal organic framework material and a preparation method and application thereof. Background technique [0002] With the rapid development of various industries, in industrial production, agricultural production and daily life, a large amount of phosphorus-containing wastewater flows into slow-flowing water bodies such as lakes, rivers and reservoirs. Excessive phosphorus will lead to eutrophication of water bodies and bring great harm. It is mainly manifested in the proliferation of algae and rich organisms in the water, producing toxic substances that pollute the water body and endanger human health; COD in the water decreases, the water body deteriorates, and fish and fish The survival of other organisms; affect the ecological balance of the water area. In my country, more than 50% of lakes and 30% of large-scale reservoirs have experienced w...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/10
CPCB01J20/223C02F1/285C02F2101/105
Inventor 罗旭彪吴星闵孝烨罗剑锋罗胜联
Owner NANCHANG HANGKONG UNIVERSITY
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