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Method for preparing surface appearance controllable hollow manganese dioxide nano spheres

A manganese dioxide and surface morphology technology is applied in the field of preparation of hollow manganese dioxide nanospheres, which can solve problems such as surface morphology of refractory manganese dioxide, and achieve the effects of accelerating ion transmission speed, increasing contact and good performance.

Active Publication Date: 2013-11-13
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the shortcoming that it is difficult to control the surface morphology of manganese oxide by using a single template to prepare hollow manganese oxide, the object of the present invention is to use triblock copolymer Pluronic F-127 as a soft template and solid silicon spheres as a hard template, and regulate Mass ratio of soft and hard templates to prepare hollow manganese dioxide nanosphere structures with controllable surface morphology under hydrothermal reaction conditions

Method used

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  • Method for preparing surface appearance controllable hollow manganese dioxide nano spheres
  • Method for preparing surface appearance controllable hollow manganese dioxide nano spheres
  • Method for preparing surface appearance controllable hollow manganese dioxide nano spheres

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1 sea urchin-shaped hollow manganese dioxide nanosphere

[0025] After stirring 20ml of ethanol, 6ml of water and 1ml of ammonia water at room temperature, add a mixed solution of 11ml of ethanol and 3ml of ethyl orthosilicate, and stir vigorously for 8 hours (6-8 hours are acceptable) to obtain a milky white suspension. The precipitate was separated and washed, and dried to obtain solid silica spheres, which were used as hard templates. Ultrasonically disperse 1.0g (1.0-1.5g) of the solid silicon spheres prepared above in 25ml deionized water, add 0.05g Pluronic F-127 (0.05-0.25g) under magnetic stirring to obtain a uniform suspension, and then 1.0g (1.0~1.8g is acceptable) of KMnO 4 Add to the above mixture and continue stirring for a period of time. Transfer the mixture obtained above to a 50ml hydrothermal reaction kettle, seal it, and react at 150°C for 24 hours (24-48 hours are acceptable). After the reactor was naturally cooled to room temperature, ...

Embodiment 2

[0026] Embodiment 2 Flower-shaped hollow manganese dioxide nanospheres

[0027] After stirring 20ml of ethanol, 6ml of water and 1ml of ammonia water at room temperature, add a mixed solution of 11ml of ethanol and 3ml of ethyl orthosilicate, and stir vigorously for 8 hours (6-8 hours are acceptable) to obtain a milky white suspension. The precipitate was separated and washed, and dried to obtain solid silica spheres, which were used as hard templates. Ultrasonic disperse 1.0g (1.0-1.5g) of the above-prepared solid silicon spheres into 25ml deionized water, add 0.3g Pluronic F-127 (0.2-0.4g) under magnetic stirring to obtain a uniform suspension, and then 1.0g (1.0~1.8g is acceptable) of KMnO 4 Add to the above mixture and continue stirring for a period of time. Transfer the mixture obtained above to a 50ml hydrothermal reaction kettle, seal it, and react at 150°C for 24 hours (24-48 hours are acceptable). After the reactor was naturally cooled to room temperature, it was f...

Embodiment 3

[0028] Example 3 stacked hollow manganese dioxide nanospheres

[0029] After stirring 20ml of ethanol, 6ml of water and 1ml of ammonia water at room temperature, add a mixed solution of 11ml of ethanol and 3ml of ethyl orthosilicate, and stir vigorously for 8 hours (6-8 hours are acceptable) to obtain a milky white suspension. The precipitate was separated and washed, and dried to obtain solid silica spheres, which were used as hard templates. Ultrasonic disperse 1.0g (1.0-1.5g is acceptable) of the solid silicon spheres prepared above in 25ml deionized water, add 0.8g Pluronic F-127 (0.6-1.0g is acceptable) under magnetic stirring to obtain a uniform suspension, and then 1.0g (1.0~1.8g is acceptable) of KMnO 4Add to the above mixture and continue stirring for a period of time. Transfer the mixture obtained above to a 50ml hydrothermal reaction kettle, seal it, and react at 150°C for 24 hours (24-48 hours are acceptable). After the reactor was naturally cooled to room tempe...

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Abstract

The invention discloses a method for preparing surface appearance controllable hollow manganese dioxide nano spheres. According to the method, the hollow manganese dioxide nano sphere structures are prepared by a double-template assisted hydrothermal reaction method by taking triblock copolymer PluronicF-127 as a soft template, taking a solid silicon sphere as a hard template, and taking KMnO4 as a manganese source. The surface appearances of the hollow manganese dioxide nano spheres can be controlled by changing the mass ratio of the added soft template to the added hard template. After being tested by a scanning electron microscope, the manganese dioxide material is large in specific surface area and optimized in charge transfer passage, the contact between active substance and electrodes is increased, ion transmission speed is increased, and the manganese dioxide nano spheres are excellent in performance during electrochemical test, and can be expected to be widely applied in the field of supercapacitor materials.

Description

technical field [0001] The invention relates to a preparation technology of nanometer materials, in particular to a preparation method of hollow manganese dioxide nanospheres with controllable surface morphology. Background technique [0002] In recent years, with the rapid popularization of electronic products, the research topic of providing high-power backup power for multi-functional electronic products has attracted more and more attention from workers in the field of electrochemistry. As a new type of energy storage element, supercapacitors have higher specific capacitance compared with traditional capacitors, and the specific capacitance that can be stored is more than ten times that of traditional capacitors; compared with batteries, they have higher Specific power, can instantly release large current, has the characteristics of short charging time, high charging efficiency, long cycle life, no memory effect and basically no maintenance. It fills the gap between trad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/02B82Y40/00
Inventor 程起林马菁萍李春忠江浩邬斌洁
Owner EAST CHINA UNIV OF SCI & TECH
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