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Method for preparing polynary nano-cage composite material

A technology of composite materials and nanocages, which is applied in the field of preparing ternary non-spherical composite materials, can solve the problems of lack of morphological diversity, limited morphologies, hindering the use of MOF and its derivatives, and achieve easy control of operating conditions and separation and agglomeration The effect of small degree and good particle size dispersion

Inactive Publication Date: 2017-12-19
JIANGSU UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

But to date, although MOF template strategies have made continuous progress, the production of anisotropic hollow structures with highly symmetric geometries is still relatively rare due to the limited morphology of MOF precursors, and the lack of morphological diversity hinders MOF and Its derivatives are more widely used
Therefore, developing a simple and reliable method to fabricate anisotropic aspheric hollow structures is highly desired and remains challenging.

Method used

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  • Method for preparing polynary nano-cage composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Weigh 0.2910g (1.0mmol) of cobalt nitrate and 0.3284g (4.0mmol) of 2-methylimidazole and dissolve them in 25mL of methanol to form two solutions. Then, the 2-methylimidazole solution was quickly poured into the cobalt nitrate solution under stirring, and after stirring for 5 minutes, the resulting mixed solution was aged at room temperature for 24 hours. The purple precipitate was collected by centrifugation and dried at 60°C for 12 hours to obtain the product ZIF-67 nanocrystals.

[0032] 40 mg of ZIF-67 was dispersed in 25 mL of ethanol containing 80 mg of zinc nitrate. After stirring for 1 h, ZIF-67 / Zn-Co hydroxide nanocage particles were formed, centrifuged and collected, and finally dried at 60 °C for 12 h. Then, in air at 350°C at 2°C min -1 The ZIF-67 / Zn-Co hydroxide nanocage particles were annealed at a rate of 2 hours to obtain ZnCo 2 o 4 @Co 3 o 4 Hollow nanocages.

[0033] 40 mg of ZIF-67 was dispersed in 25 mL of ethanol containing 80 mg of nickel nit...

Embodiment 2

[0036]Weigh 0.2910g (1.0mmol) of cobalt nitrate and 0.3284g (4.0mmol) of 2-methylimidazole and dissolve them in 25mL of methanol to form two solutions. Then, the 2-methylimidazole solution was quickly poured into the cobalt nitrate solution under stirring, and after stirring for 5 minutes, the resulting mixed solution was aged at room temperature for 24 hours. The purple precipitate was collected by centrifugation and dried at 60°C for 12 hours to obtain the product ZIF-67 nanocrystals.

[0037] 40 mg of ZIF-67 was dispersed in 25 mL of ethanol containing 80 mg of zinc nitrate. After stirring for 1 h, ZIF-67 / Zn-Co hydroxide nanocage particles were formed, centrifuged and collected, and finally dried at 60 °C for 12 h. Then, in air at 300°C at 2°C min -1 The ZIF-67 / Zn-Co hydroxide nanocage particles were annealed at a rate of 2 hours to obtain ZnCo 2 o 4 @Co 3 o 4 Hollow nanocages. 40 mg of ZIF-67 was dispersed in 25 mL of ethanol containing 80 mg of nickel nitrate. Aft...

Embodiment 3

[0040] Weigh 0.2910g (1.0mmol) of cobalt nitrate and 0.3284g (4.0mmol) of 2-methylimidazole and dissolve them in 25mL of methanol to form two solutions. Then, the 2-methylimidazole solution was quickly poured into the cobalt nitrate solution under stirring, and after stirring for 5 minutes, the resulting mixed solution was aged at room temperature for 24 hours. The purple precipitate was collected by centrifugation and dried at 60°C for 12 hours to obtain the product ZIF-67 nanocrystals.

[0041] 40 mg of ZIF-67 was dispersed in 25 mL of ethanol containing 80 mg of zinc nitrate. After stirring for 1 h, ZIF-67 / Zn-Co hydroxide nanocage particles were formed, centrifuged and collected, and finally dried at 60 °C for 12 h. Then, in air at 350°C at 2°C min -1 The ZIF-67 / Zn-Co hydroxide nanocage particles were annealed at a rate of 3 hours to obtain ZnCo 2 o 4 @Co 3 o 4 Hollow nanocages.

[0042] 40 mg of ZIF-67 was dispersed in 25 mL of ethanol containing 80 mg of nickel nit...

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Abstract

The invention belongs to the technical field of metal-organic framework materials, and relates to a method for preparing a polynary nano-cage composite material by using a zeolitic imidazolate framework as a template. The method comprises the following steps: synthesizing a ZIF-67 framework through a solvothermal technology by using methanol as a solvent, and synthesizing a hydroxide precursor from nickel nitrate and zinc nitrate by adjusting a mass ratio of the zinc nitrate to the nickel nitrate; and sequentially centrifuging, washing, drying and calcining the hydroxide precursor to obtain the nano-cage composite material. The method has the advantages of simple process, low price, easiness in control, and low cost, and the prepared product is a nano-cage composite material having a non-spherical hollow structure, and has the advantages of large specific surface area, high crystallinity, good morphology, and easiness in realization of industrialization.

Description

technical field [0001] The invention belongs to the technical field of metal-organic framework materials, and relates to a method for preparing a multi-element nano-cage composite material using a zeolite imidazolate skeleton as a template, in particular to preparing a ternary non-spherical composite material using ZIF-67 as a template. Background technique [0002] Metal-organic frameworks (MOFs), porous nanomaterials formed by coordinating metal ions or inorganic metal groups with organic groups, have large specific surface area, low density, high porosity and general functions. A new electrode material. MOFs can not only be directly used as capacitor electrode materials, but also can be used as templates for the preparation of metal oxides, composite metal oxides, metal nanoparticles, and porous carbon compounds, which expands the application fields of MOF materials. MOF can effectively control the nanostructure and surface morphology of metal oxides to make better use o...

Claims

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Application Information

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IPC IPC(8): C01G53/00C01G51/00H01G11/24H01G11/30
CPCY02E60/13C01G53/00C01G51/40C01P2002/72C01P2004/03C01P2004/82H01G11/24H01G11/30
Inventor 郝臣周赛赛王畅王义军王俊杰王晓红高海文
Owner JIANGSU UNIV
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