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PCN metal organic framework and graphene oxide composite adsorption material and preparation method thereof

A metal-organic framework and graphene composite technology, applied in chemical instruments and methods, and other chemical processes, to achieve broad application prospects, high-efficiency uranium adsorption capacity, and short cycle effects

Active Publication Date: 2020-02-04
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there have been no reports on the use of PCN series metal-organic frameworks for uranium adsorption. Compared with the above-mentioned MOFs, PCN series metal-organic frameworks have larger pore diameters, good heat resistance and chemical stability, and excellent Acid and alkali resistance (stable physical and chemical properties in an aqueous solution with a pH range of 2 to 13), can be used in a wide range of pH values, and is a very promising adsorption material

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  • PCN metal organic framework and graphene oxide composite adsorption material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] 1. The preparation method of PCN metal-organic framework: take 0.05g porphyrin complexing agent (H 2 TCPP), 0.075g zirconium chloride (ZrCl 4 ), was dissolved in 8 mL of N,N-diethylformamide, and 2.7 g of benzoic acid was added as a reaction stabilizer. After the above mixed solution was ultrasonically dispersed for 0.5 h, it was transferred to a hydrothermal reaction kettle for hydrothermal reaction at a reaction temperature of 120° C. and a reaction time of 48 h. After the reaction, cool to room temperature, filter the solid matter, wash with deionized water and methanol in sequence, and dry at 80° C. for 24 hours to obtain a PCN organometallic framework.

[0033] 2. The preparation process of carboxylated graphene: ultrasonically disperse 0.5g GO in 600mL deionized water, ultrasonically disperse for 0.4h; add 5g of sodium hydroxide, ultrasonically disperse for 0.4h; add 14g of bromoacetic acid, ultrasonically disperse for 0.4h. The carboxylation reaction was carrie...

Embodiment 2

[0038] 1. The preparation method of PCN metal-organic framework: take 0.1g porphyrin complexing agent (H 2 TCPP), 0.13g zirconium chloride (ZrCl 4 ), dissolved in 15mL of N,N-diethylformamide, and added 5.5g of benzoic acid as a reaction stabilizer. After ultrasonically dispersing the above mixed solution for 0.6 h, it was transferred to a hydrothermal reaction kettle for hydrothermal reaction. The reaction temperature was 140° C. and the reaction time was 36 h. After the reaction, cool to room temperature, filter the solid matter, wash with deionized water and methanol in sequence, and dry at 85° C. for 24 hours to obtain a PCN organometallic framework.

[0039] 2. The preparation process of carboxylated graphene: ultrasonically disperse 0.5g GO in 700mL deionized water, ultrasonically disperse for 0.5h; add 3.5g sodium hydroxide, ultrasonically disperse for 0.5h; add 10g of bromoacetic acid, ultrasonically disperse for 0.5h. The carboxylation reaction was carried out at 25...

Embodiment 3

[0044] 1. The preparation method of PCN metal-organic framework: take 0.1g porphyrin complexing agent (H 2 TCPP), 0.17g zirconium chloride (ZrCl 4 ), was dissolved in 17mL of N,N-diethylformamide, and 5.7g of benzoic acid was added as a reaction stabilizer. After ultrasonically dispersing the above mixed solution for 0.6 h, it was transferred to a hydrothermal reaction kettle for hydrothermal reaction. The reaction temperature was 135° C. and the reaction time was 48 h. After the reaction, cool to room temperature, filter the solid matter, wash with deionized water and methanol in sequence, and dry at 75° C. for 30 h to obtain a PCN organometallic framework.

[0045] 2. The preparation process of carboxylated graphene: ultrasonically disperse 0.5g GO in 800mL deionized water, ultrasonically disperse for 0.5h; add 3.5g sodium hydroxide, ultrasonically disperse for 0.4h; add 12.5g bromoacetic acid, ultrasonically disperse for 0.4h. The carboxylation reaction was carried out at...

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Abstract

The invention provides a PCN metal organic framework and graphene oxide composite adsorption material and a preparation method thereof. The method comprises the following steps: step 1, preparing a PCN metal organic framework by using zirconium chloride and a porphyrin coordination agent as raw materials through a solvothermal process; step 2, by using graphene oxide as a raw material, performingcarboxylation modification treatment on the graphene oxide by using bromoacetic acid to prepare carboxylated graphene oxide; and step 3, realizing effective compounding of the PCN metal organic framework and the carboxylated graphene oxide by using an ultrasonic-assisted stirring process to prepare the metal organic framework and graphene oxide composite adsorption material. The PCN metal organicframework / graphene oxide composite adsorption material provided by the invention has the advantages of high adsorption efficiency, a simple preparation process, a short cycle, few by-products and lowcosts, and has broad application prospects, especially in treatment of acidic uranium-containing wastewater.

Description

technical field [0001] The invention relates to an adsorption material and a preparation method, in particular to a PCN metal organic framework and graphene oxide composite adsorption material and a preparation method, belonging to the field of composite adsorption material preparation. Background technique [0002] The continuous progress and development of society put forward an urgent demand for low-carbon energy. As a low-carbon energy source, nuclear energy has been developed and utilized by countries all over the world. Uranium is an important element in the nuclear energy industry and is a high-efficiency nuclear energy fuel, but it is radioactive and toxic. If the uranium-containing wastewater produced by the nuclear energy industry is directly discharged into the natural environment without treatment, it can exist stably in the soil and water for a long time, posing a serious threat to the natural environment, ecosystems and human health. Therefore, the effective ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30
CPCB01J20/20B01J20/226B01J20/22B01J2220/4812B01J2220/4806B01J2220/46
Inventor 张春红毕昌隆杨明马福秋年金茹刘立佳董红星
Owner HARBIN ENG UNIV
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