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Preparation method of metal-organic frame material La-BDC adsorbing CO2 and modified product of metal-organic frame material La-BDC

An organic framework and metal technology, which is applied in the field of preparation of metal-organic framework materials La-BDC and its modified products, can solve the problems of inability to achieve efficient gas adsorption, obvious human harm, and small adsorption amount of metal-organic framework materials. , to achieve good industrial application prospects, large adsorption capacity, and solve the effect of low pressure adsorption capacity

Active Publication Date: 2014-08-13
HUNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, at present, most La-BDC framework materials are mainly grown in single crystals, and few of them are used in gas adsorption separation, and most of the corresponding materials used in this field use organic substances as deprotonation reagents, such as DMF, pyridine, Bipyridyl, etc., these organic substances are more harmful to the human body
In addition, the adsorption capacity of the prepared metal-organic framework materials is small, and the purpose of efficient adsorption of gases cannot be achieved.
Therefore, it is a great challenge to design La-BDC-like metal-organic framework materials that are simple and feasible with high adsorption capacity.

Method used

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  • Preparation method of metal-organic frame material La-BDC adsorbing CO2 and modified product of metal-organic frame material La-BDC

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0030] a. Add 3.409g La(NO 3 ) 2 Dissolve in 30ml deionized water, stir and dissolve to form solution A;

[0031] b. Dissolve 0.28g NaOH in 50ml deionized water, after stirring and dissolving, add the calculated amount of 1,4-phthalic acid (H 2 BDC), after vigorously stirring and dissolving, solution B is formed;

[0032] c. At room temperature, add solution A to solution B dropwise, stir, and mix solution A and solution B uniformly to obtain a mixed solution of solution A and solution B;

[0033] d. At 160°C, the mixed solution of solution A and solution B was crystallized for 24 hours to obtain a solid product;

[0034] e. Wash the solid product obtained in step d with deionized water until the pH of the washing water is close to 7, and then raise the temperature of the solid product washed with deionized water to 180 °C at a heating rate of 5 °C / min in a muffle furnace. ℃ for 6 hours to obtain the metal-organic framework material La-BDC.

preparation example 2

[0036]a. Add 3.409g La(NO 3 ) 2 Dissolve in 30ml deionized water, stir and dissolve to form solution A;

[0037] b. Dissolve 0.392g KOH in 50ml deionized water, stir and dissolve, then add the calculated amount of 1,4-phthalic acid (H 2 BDC), after vigorously stirring and dissolving, solution B is formed;

[0038] c. At room temperature, add solution A to solution B dropwise, stir, and mix solution A and solution B uniformly to obtain a mixed solution of solution A and solution B;

[0039] d. At 170°C, the mixed solution of solution A and solution B was crystallized for 24 hours to obtain a solid product;

[0040] e. Wash the solid product obtained in step d with deionized water until the pH of the washing water is close to 7, and then raise the temperature of the solid product washed with deionized water to 190 °C at a heating rate of 5 °C / min in a muffle furnace. ℃, kept for 5 hours, and the metal-organic framework material La-BDC was obtained.

preparation example 3

[0042] a. Add 3.409g La(NO 3 ) 2 Dissolve in 30ml deionized water, stir and dissolve to form solution A;

[0043] b. Add 0.371g Na 2 CO 3 Dissolve in 50ml deionized water, stir and dissolve, add the calculated amount of 1,4-phthalic acid (H 2 BDC), after vigorously stirring and dissolving, solution B is formed;

[0044] c. At room temperature, add solution A to solution B dropwise, stir, and mix solution A and solution B uniformly to obtain a mixed solution of solution A and solution B;

[0045] d. At 180°C, the mixed solution of solution A and solution B was crystallized for 18 hours to obtain a solid product;

[0046] e. Wash the solid product obtained in step d with deionized water until the pH of the washing water is close to 7, and then raise the temperature of the solid product washed with deionized water to 190 °C at a heating rate of 5 °C / min in a muffle furnace. The temperature was kept at ℃ for 5 hours, and the metal-organic framework material La-BDC was obtain...

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Abstract

The invention discloses a preparation of a metal-organic frame material La-BDC adsorbing CO2, which comprises the following steps of: dissolving La(NO3)3 in de-ionized water, to obtain a solution A; dissolving 1,4-phthalic acid in an inorganic base solution, to obtain a solution B; at room temperature, mixing the solution A with the solution B to obtain a first mixing solution, and crystallizing the first mixing solution at 150-180 DEG C for 18-30hours to obtain a first solid product; washing the first solid product by de-ionized water until the first solid product is neutral; heating the washed neutral first solid product in a muffle to 180-200 DEG C at a speed of 5-10 DEG C / min; and keeping for 4-6hours to obtain the metal-organic frame material La-BDC. The metal-organic frame material La-BDC adsorbing CO2, and has a great absorption capacity on CO2 at comparatively low temperature and in a low-pressure environment; and the desorption temperature is comparatively low.

Description

【Technical field】 [0001] The present invention relates to CO 2 Adsorption materials, specifically related to a kind of high-efficiency adsorption of CO in a low temperature and low pressure environment 2 The preparation method of the metal-organic framework material La-BDC and its modification. 【Background technique】 [0002] carbon dioxide (CO 2 ) is currently the most important greenhouse gas in the world, and it is also the cheapest and most abundant resource in the C1 family, and CO 2 Wide range of applications, e.g. CO 2 Used as a fire extinguishing agent; CO 2 Used as an extractant to process and extract food, beverages, oils, spices, medicines, etc.; CO 2 Used as a food preservative, it can effectively prevent the growth of bacteria and mold in food, avoid food deterioration, and keep fresh and maintain the original flavor and nutritional content of food; CO 2 Used as raw materials for the production of methanol, methane, methyl ether, polycarbonate and other ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCY02C10/08Y02C20/40
Inventor 尹双凤杨泛明陈浪张晓辉李文盛
Owner HUNAN UNIV
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