Two-dimensional MOF/ carbon oxide material composite thin film and its preparation method and application

Abstract

The application relates to a preparation method of a two-dimensional metal organic framework (MOF) / carbon oxide material composite thin film. The application further relates to a two-dimensional metal organic framework (MOF) / carbon oxide material composite thin film. Besides, the application further relates to an application of the two-dimensional metal organic framework (MOF) / carbon oxide material composite thin film in absorbing radioactive nuclei waste fluid. The invention has the beneficial effects of simple operation and strong repeatability; graphene oxide and MOF can be self-assembled by height layer by layer. Besides, the composite thin film can realize ultra-strong absorbing ability, and the simple method is universally applicable to the compounding of the two-dimensional metalorganic framework containing different center metal ions and the carbon oxide material. These high-quality two-dimensional MOF / carbon oxide composite materials have huge application value in absorption, separation and catalyst domains.

Description

technical field

[0001] The invention relates to the technical field of composite film preparation. Specifically, the present invention relates to a two-dimensional metal-organic framework (MOF) / carbon oxide material composite thin film and its preparation method and application. Background technique

[0002] In recent years, leaks of radioactive substances are common. For example, on March 11, 2011, a 9.0-magnitude earthquake and a huge tsunami occurred in the northeastern sea of ​​Japan, which triggered the accident of the Fukushima nuclear power plant. big impact.

[0003] Radioactive cesium is an important part of nuclear waste and nuclear leakage. The facilities nuclear power plants use to process spent fuel and produce nuclear fuel and coolant are major sources of contamination. During cooling time, leaching of this radionuclide can contaminate our water supplies, soil and air. Such radioactive contamination enters the food chain through plants and is eventually inc...

Examples

Embodiment 1

[0075] This example involves the preparation of Co-MOF / GO composite thin films.

[0076] Preparation of GO

[0077] 20g of expandable graphite was placed in a crucible, and the crucible was placed in a muffle furnace at 1100°C for 15 seconds to rapidly expand to obtain expanded graphite. Weigh 1g of expanded graphite and place it in an 800ml beaker. Use a graduated cylinder to measure 200ml of concentrated sulfuric acid and add it to the beaker containing the expanded graphite. Put a rotor in the beaker and stir at room temperature for 10 minutes to make it evenly mixed. Then, weigh 10 g of potassium permanganate, slowly add it into the beaker, then put the beaker into a water bath, heat the liquid in the beaker to 60° C. and keep it warm for 24 hours for oxidation. After oxidation, 25ml of hydrogen peroxide was added at 0°C to react excess potassium permanganate, and then 25ml of concentrated hydrochloric acid was added. Finally, the reaction product was centrifuged and was...

Embodiment 2

[0084] This example involves the preparation of Ni-MOF / GO composite thin films.

[0085] According to the process of Example 1, Ni-MOF was prepared by using 0.015 mmol of Ni(NO3)2·6H2O as the precursor solution, and Ni-MOF / GO was obtained by suction filtration with GO for 24 hours, and the prepared composite Thin film materials are characterized by a series of morphology and structure.

Embodiment 3

[0087] This example relates to the preparation of Mn-MOF / GO composite thin films.

[0088] According to embodiment 1 process, with the Mn of 0.015mmol (NO 3 ) 2 ·6H 2 O is the precursor solution to prepare Mn-MOF, and after 24 hours of suction filtration with GO, the Mn-MOF / GO composite film can be obtained, and a series of morphological and structural characterizations of the prepared composite film material are performed.

technical field

[0001] The invention relates to the technical field of composite film preparation. Specifically, the present invention relates to a two-dimensional metal-organic framework (MOF) / carbon oxide material composite thin film and its preparation method and application. Background technique

[0002] In recent years, leaks of radioactive substances are common. For example, on March 11, 2011, a 9.0-magnitude earthquake and a huge tsunami occurred in the northeastern sea of ​​Japan, which triggered the accident of the Fukushima nuclear power plant. big impact.

[0003] Radioactive cesium is an important part of nuclear waste and nuclear leakage. The facilities nuclear power plants use to process spent fuel and produce nuclear fuel and coolant are major sources of contamination. During cooling time, leaching of this radionuclide can contaminate our water supplies, soil and air. Such radioactive contamination enters the food chain through plants and is eventually inc...

Examples

Embodiment 1

[0075] This example involves the preparation of Co-MOF / GO composite thin films.

[0076] Preparation of GO

[0077] 20g of expandable graphite was placed in a crucible, and the crucible was placed in a muffle furnace at 1100°C for 15 seconds to rapidly expand to obtain expanded graphite. Weigh 1g of expanded graphite and place it in an 800ml beaker. Use a graduated cylinder to measure 200ml of concentrated sulfuric acid and add it to the beaker containing the expanded graphite. Put a rotor in the beaker and stir at room temperature for 10 minutes to make it evenly mixed. Then, weigh 10 g of potassium permanganate, slowly add it into the beaker, then put the beaker into a water bath, heat the liquid in the beaker to 60° C. and keep it warm for 24 hours for oxidation. After oxidation, 25ml of hydrogen peroxide was added at 0°C to react excess potassium permanganate, and then 25ml of concentrated hydrochloric acid was added. Finally, the reaction product was centrifuged and was...

Embodiment 2

[0084] This example involves the preparation of Ni-MOF / GO composite thin films.

[0085] According to the process of Example 1, Ni-MOF was prepared by using 0.015 mmol of Ni(NO3)2·6H2O as the precursor solution, and Ni-MOF / GO was obtained by suction filtration with GO for 24 hours, and the prepared composite Thin film materials are characterized by a series of morphology and structure.

Embodiment 3

[0087] This example relates to the preparation of Mn-MOF / GO composite thin films.

[0088] According to embodiment 1 process, with the Mn of 0.015mmol (NO 3 ) 2 ·6H 2 O is the precursor solution to prepare Mn-MOF, and after 24 hours of suction filtration with GO, the Mn-MOF / GO composite film can be obtained, and a series of morphological and structural characterizations of the prepared composite film material are performed.

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