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Bimetallic nano-phosphate based on metal-organic framework and preparation method and application thereof

A bimetallic nano-organic framework technology, applied in the field of materials, can solve problems such as high energy consumption, and achieve the effects of avoiding energy consumption, increasing specific surface area, and cheap and easy-to-obtain raw materials

Inactive Publication Date: 2019-02-19
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve technical problems such as high energy consumption caused by methods such as pyrolysis, the present invention uses metal nitrate cobalt nitrate and organic ligand 2-methylimidazole as raw materials to react in an organic solvent to obtain a metal-organic framework, and then uses another After metal nitrate nickel nitrate treatment, it is further treated with phosphate to obtain a bimetallic nanophosphate with a hollow core-shell structure based on a metal-organic framework

Method used

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  • Bimetallic nano-phosphate based on metal-organic framework and preparation method and application thereof
  • Bimetallic nano-phosphate based on metal-organic framework and preparation method and application thereof
  • Bimetallic nano-phosphate based on metal-organic framework and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0055] A method for preparing a bimetallic nano-phosphate based on a metal-organic framework, comprising the following steps:

[0056] (1) Preparation of metal-organic framework (ZIF-67): Weigh cobalt nitrate and 2-methylimidazole and dissolve them in 500 mL of organic solvent methanol according to the molar ratio of 1:4, in which 1mol of cobalt nitrate and 2-methylimidazole 4mol, stir to mix evenly, stand at room temperature for 24h, filter the above reaction solution, wash the precipitate with mother liquor, and dry at 70°C to obtain the required crystalline material metal-organic framework ZIF-67;

[0057] (2) Preparation of precursor (ZIF-67-LDH): Weigh 100mg ZIF-67 and dissolve in 160mgNi(NO 3 ) 2 The dehydrated ethanol solution, strong stirring 30min, the stirring speed is 500r / min, can obtain the solution of ZIF-67-LDH;

[0058] (3) The preparation of ZIF-67-CNP: add 80mgNa in the solution gained in step (2) 3 PO 4 The distilled aqueous solution was stirred for 1 ho...

Embodiment 2

[0061] (1) The preparation of ZIF-67 metal-organic framework is the same as that in Example 1.

[0062] (2) The preparation of ZIF-67-LDH is the same as in Example 1.

[0063] (3) The preparation of ZIF-67-CNP: add 80mgNa in the solution gained in step (2) 3 PO 4 The distilled aqueous solution was stirred for 1 hour and then reacted at 25°C for 15 hours. The resulting precipitate was centrifuged, washed three times with deionized water and absolute ethanol, and dried at 70°C for 12 hours to obtain the target product.

[0064] The preparation of the active material electrode is the same as in Example 1.

Embodiment 3

[0066] (1) The preparation of ZIF-67 metal-organic framework is the same as that in Example 1.

[0067] (2) The preparation of ZIF-67-LDH is the same as in Example 1.

[0068] (3) The preparation of ZIF-67-CNP: add 80mgNa in the solution gained in step (2) 3 PO 4 The distilled aqueous solution was stirred for 1 hour and then reacted at 50°C for 15 hours. The resulting precipitate was centrifuged, washed three times with deionized water and absolute ethanol, and dried at 70°C for 12 hours to obtain the target product.

[0069] The preparation of the active material electrode is the same as in Example 1.

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Abstract

The invention provides a preparation method of bimetallic nano-phosphate based on a metal-organic framework, which comprises the following steps of: using cobalt nitrate and 2-methylimidazole as raw materials to prepare a metal-organic framework, and then using another nitrate, that is, nickel nitrate to treat the metal-organic framework to form a layered double hydroxide on the metal-organic framework to maintain the morphology of the metal-organic framework, to achieve a conformal transformation, and to obtain a precursor. According to the bimetallic nano-phosphate based on the metal-organicframework and the preparation method and the application thereof, the obtained precursor is etched by using phosphate, and a hollow core shell structure formed increases the specific surface area ofthe material and the capacitance performance is high accordingly. The preparation method of the bimetallic nano-phosphate based on the metal-organic framework has the advantages that the raw materialsare cheap and easy to obtain, the operation is simple, the high energy consumption is avoided, and the bimetallic nano-phosphate obtained has high capacitance performance and can be used for preparation of capacitor elements.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a bimetallic nano-phosphate based on a metal-organic framework, a preparation method and an application thereof. Background technique [0002] Metal-organic frameworks (Metal-organic Frameworks, MOFs) are a class of crystalline porous materials constructed by the self-assembly of metal ions and organic ligands. MOFs have the advantages of porosity and large specific surface area, so in recent years they have been used as The field of electrode materials for capacitors has great application prospects. The structure of MOFs contains a large number of metal ions and has structural diversity, and its building metal elements can be extended from transition elements to main group elements and lanthanides. Since the common method for preparing metal oxides from MOFs materials is pyrolysis, which requires high temperature and high pressure conditions, which leads to the di...

Claims

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Application Information

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IPC IPC(8): C08G83/00H01G11/30
CPCH01G11/30C08G83/008Y02E60/13
Inventor 王磊肖振宇鲍玉香韩吉姝李彬刘杰
Owner QINGDAO UNIV OF SCI & TECH
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