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Structurally-adjustable 3D network-structured mesoporous manganese dioxide and preparation method thereof

A technology of manganese dioxide and network structure, which is applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of complex template removal process, too active properties, poor thermal stability, etc., and achieve no pollution in the process, low cost and short production cycle short effect

Inactive Publication Date: 2016-04-13
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether it is the soft template method or the hard template method, the cost is high and the process is complicated, the template removal process is complicated and accompanied by the destruction of mesopores, it is not an ideal method for low-cost large-scale production
At the same time, like other transition metal oxides, manganese dioxide has problems such as too active properties, poor thermal stability, and easy sintering at high temperatures, making it difficult to precisely control its structure during preparation.

Method used

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  • Structurally-adjustable 3D network-structured mesoporous manganese dioxide and preparation method thereof
  • Structurally-adjustable 3D network-structured mesoporous manganese dioxide and preparation method thereof
  • Structurally-adjustable 3D network-structured mesoporous manganese dioxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: At room temperature, dissolve 0.4g of 1,4-butanediol in 200mL of deionized water and stir evenly to prepare a 1,4-butanediol aqueous solution with a concentration of 0.022mol / L; at room temperature, slowly Add 50ml of potassium permanganate aqueous solution with a concentration of 0.15mol / L; keep stirring for 2 hours at room temperature, the solution turns from purple to colorless, and the reaction ends; after filtering, the filter cake is washed 2 to 3 times with deionized water, and dried , that is, black manganese dioxide powder.

[0035] figure 1 A is the scanning electron micrograph of the manganese dioxide sample that the present embodiment makes, figure 2 Curves 1 and 1-350 are the XRD patterns of the manganese dioxide sample obtained in this example and its heat treatment at 350°C (under air atmosphere, 3h). image 3 Curve 1 is the nitrogen adsorption-desorption curve ( image 3 a) and pore size distribution curve ( image 3 b).

[0036] Accordi...

Embodiment 2

[0038] Example 2: The difference between this example and Example 1 is that at room temperature, 2.6g of 1,7-heptanediol was dissolved in 200mL of deionized water and stirred evenly to prepare 1,7-heptane with a concentration of 0.1mol / L Aqueous glycol solution; All the other contents are exactly the same as those described in Example 1.

[0039] The test results show that the morphology and structure of the obtained manganese dioxide are similar to those in Example 1: they are porous α-MnO with a sponge-like or honeycomb 3D network structure prepared by nanosheets. 2 . The difference is that the specific surface area of ​​the sample in this example is 158m 2 / g, the average pore diameter is 30.6nm.

Embodiment 3

[0040]Example 3: The difference between this example and Example 1 is that at room temperature, 2.4g of 1,2,7-heptanetriol was dissolved in 200mL of deionized water and stirred evenly to prepare 1,2 with a concentration of 0.08mol / L , 7-heptanetriol aqueous solution, all the other contents are consistent with Example 1.

[0041] The test results show that the morphology and structure of the obtained manganese dioxide are similar to those in Example 1: they are porous α-MnO nanosheet-like sponge or honeycomb 3D network structure 2 . The difference is that the specific surface area and the average pore size of the sample of this embodiment are respectively 164m 2 / g and 28.7nm.

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Abstract

The invention discloses structurally-adjustable 3D network-structured mesoporous manganese dioxide and a preparation method thereof. The structurally-adjustable 3D network-structured mesoporous manganese dioxide is characterized in that manganese dioxide nanosheet hinges are self-assembled to form 3D network-structured spongy or cellular porous block bodies, has the characteristics of large specific surface area (larger than 150 m<2>g<-1>), narrow pore size distribution (good aperture uniformity), small crystallization particle size and the like, and then can be applied to the super capacitor, battery, catalysis and sewage control fields. The provided preparation method has the advantages of being high in productivity, short in production period , low in equipment requirement and the like, is a mesoporous manganese dioxide preparation method which is simple in technological process, low in energy consumption, short in reaction period and low in cost, and has a huge industrial application value.

Description

technical field [0001] The invention relates to a mesoporous manganese dioxide and a preparation method thereof, in particular to a multi-purpose, 3D network structure mesoporous manganese dioxide with adjustable pore diameter, specific surface area and phase structure and a preparation method thereof. Background technique [0002] In recent decades, materials in the nanoscale range have attracted the attention of many material scientists because of their unique optical, electrical, and acoustic properties, and have become an upstart in the field of inorganic solid materials. Among these materials, mesoporous materials have a pore structure (pore diameter 2-50nm) distributed in the nanoscale range and a huge specific surface area, which can provide more diffusion channels and reaction sites in the reaction, and have broad applications in many fields. Application prospects. [0003] Manganese dioxide (MnO 2 ) is an important new functional material with extensive resources,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02
CPCC01G45/02C01P2002/72C01P2004/03C01P2006/12C01P2006/16C01P2006/17
Inventor 余丽丽朱俊杰赵景泰
Owner SHANGHAI UNIV
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