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Nano oxide based on metal-organic frameworks (MOFs) and preparation method thereof

A nano-oxide, organic framework technology, applied in nanotechnology, hybrid/electric double-layer capacitor manufacturing, hybrid capacitor electrodes, etc., can solve problems such as limiting the large-scale application of nano-oxides, and achieve appearance preservation and good performance. The effect of performance, thickness reduction

Inactive Publication Date: 2016-10-26
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process of this method is not only usually accompanied by the pyrolysis process of the ligand, but also has extremely high requirements on the thermal stability, nanometer size and shape of the metal-organic framework, which greatly limits the future Large-scale application of metal-organic frameworks to synthesize nano-oxides

Method used

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  • Nano oxide based on metal-organic frameworks (MOFs) and preparation method thereof
  • Nano oxide based on metal-organic frameworks (MOFs) and preparation method thereof
  • Nano oxide based on metal-organic frameworks (MOFs) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of UPC-9 metal-organic framework: Weigh cobalt nitrate and 2,3,5,6-tetramethyl-1,4-diisophthalic acid (TMBDI) according to the mass ratio of 1:0.6 In a polytetrafluoroethylene reactor, DMA:H 2 O=1:15ml, shake to mix evenly. Seal the reaction kettle, react at 120°C for 72 hours, and then cool to room temperature; filter the above reaction solution, wash the precipitate with mother liquor, and dry at room temperature to obtain the crystalline material to be prepared for the next test and experiment.

[0036] (2) Preparation of Cobalt Tetroxide Nanosheets: Weigh 100mg of UPC-9 and place it in a 10ml sample tube, then add 8ml of 1M KOH solution, shake to make it evenly dispersed. After soaking for 30 minutes, pour the supernatant into the beaker, then add 8ml of the above alkali solution, and let stand for 30 minutes. Pour the supernatant into the beaker, then soak and rinse twice with deionized water and methanol repeatedly for five minutes each time, and...

Embodiment 2

[0039] (1) The preparation of UPC-9 metal-organic framework is the same as in Example 1.

[0040] (2) Preparation of Cobalt Tetroxide Nanosheets: Weigh 100mg of UPC-9 and put it in a 10ml sample tube, then add 0.1M KOH 8ml solution, shake to make it evenly dispersed. After soaking for 30 minutes, pour the supernatant into the beaker, then add 8ml of the above alkali solution, and let stand for 30 minutes. Pour the supernatant into the beaker, then soak and rinse with deionized water and methanol twice for five minutes each time, and then filter to collect the obtained pink multi-level block Co(OH) 2 , dried under vacuum at 65°C for 12h to obtain Co(OH) 2 Precursor. Will get Co(OH) 2 The precursor is under oxygen condition, at 20°C min -1 The heating rate was raised to 350°C and kept for 50 minutes to obtain ultra-thin Co 3 o 4 nanosheet structure.

[0041] (3) The preparation of the active material electrode is the same as in Example 1.

Embodiment 3

[0043] (1) The preparation of UPC-9 metal-organic framework is the same as in Example 1.

[0044] (2) Preparation of Cobalt Tetroxide Nanosheets: Weigh 100mg of UPC-9 and place it in a 10ml sample tube, then add 8ml of 0.5M KOH solution, shake to make it evenly dispersed. After soaking for 30 minutes, pour the supernatant into the beaker, then add 8ml of the above alkali solution, and let stand for 30 minutes. Pour the supernatant into the beaker, then soak and rinse with deionized water and methanol twice for five minutes each time, and then filter to collect the obtained pink multi-level block Co(OH) 2 , dried under vacuum at 65°C for 12h to obtain Co(OH) 2 Precursor. Will get Co(OH) 2 The precursor is under oxygen condition, at 20°C min -1 The heating rate was raised to 350°C and kept for 50 minutes to obtain ultra-thin Co 3 o 4 nanosheet structure.

[0045] (3) The preparation of the active material electrode is the same as in Example 1.

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Abstract

The invention provides a nano oxide based on metal-organic frameworks (MOFs) and a preparation method thereof, which belong to the technical field of new materials. Metal nitrate is used for reaction to obtain a metal-organic framework, an alkaline solution is used for treatment, a precursor obtained after treatment is further subjected to pyrolysis to obtain a target product. The method succeeds in getting rid of multiple restrictions on the material itself when the traditional metal-organic framework pyrolysis method is used for preparing a metallic oxide. According to the alkaline hydrolysis process provided by the method, the morphology of the nano material of the synthetic material can be controlled more effectively to enhance the capacity of the capacitor, an organic carboxylate ligand used in the case of synthesis of a crystalline material can be effectively recovered, and the cost for material synthesis is greatly reduced. A new through is provided when the conventional MOFs material is used for synthesizing a metallic oxide with a specific nano morphology and a nano size, and an important role is played in expansion of industrial production of a synthesized material with excellent capacitance performance.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a metal-organic framework-based nano oxide and a preparation method 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. Huge progress. The metal elements and organic matter that make up metal-organic frameworks can be transformed into metal / metal oxides and porous carbon under certain conditions, which is also a research hotspot in metal-organic frameworks in recent years. [0003] Due to their excellent energy performance, metal oxides have attracted much attention from the scientific community, especially as electrode materials for lithium-ion batteries and supercapacitors. The structure of MOFs contains a large number of metal ions, and nanostructured metal-based materials can be obtained under suitable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/86B82Y40/00
CPCH01G11/46H01G11/86B82Y40/00Y02E60/13
Inventor 孙道峰肖振宇范黎黎
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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