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Preparation method of manganese dioxide one-dimensional nanomaterial

A nanomaterial, manganese dioxide technology, applied in the field of simple preparation of manganese dioxide one-dimensional nanomaterials, can solve the problems of limited commercial production, high cost, environmental pollution, etc., achieve low cost, easy mass production, and easy access to raw materials Effect

Inactive Publication Date: 2010-08-11
XIANGTAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, metal oxide hydrated ruthenium oxide RuO 2 ·H 2 O has a large specific capacitance, but its high cost and environmental pollution limit its large-scale commercial production

Method used

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  • Preparation method of manganese dioxide one-dimensional nanomaterial
  • Preparation method of manganese dioxide one-dimensional nanomaterial
  • Preparation method of manganese dioxide one-dimensional nanomaterial

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In a 100 ml beaker, add 30 ml of distilled or deionized water, and dissolve 2 mmol of potassium permanganate in water to obtain solution a. In addition, 20 ml of distilled water or deionized water was added into a 100 ml beaker, and 3 mmol of manganese acetate was dissolved in water to obtain solution b. Solution a and solution b were mixed, stirred, and transferred to a stainless steel hydrothermal reaction kettle with a polytetrafluoroethylene liner with a volume of 100 ml. The kettle was sealed and placed in a thermostat at 100°C for 12 hours. After natural cooling, the product was washed by suction filtration, washed with distilled water or deionized water and absolute ethanol until the pH was neutral, and dried in a normal pressure oven at 50°C for 12 hours to obtain MnO 2 One-dimensional nanomaterials. Its XRD spectrum is as figure 1 As shown, the analytical XRD spectrum shows that the prepared sample has a good crystal structure, and the crystal structure is α-...

Embodiment 2

[0021] In a 100 ml beaker, add 30 ml of distilled or deionized water, and dissolve 5 mmol of potassium permanganate in water to obtain solution a. In addition, 20 ml of distilled water or deionized water was added into a 100 ml beaker, and 7.5 mmol of manganese acetate was dissolved in water to obtain solution b. Solution a and solution b were mixed, stirred, and transferred to a stainless steel hydrothermal reaction kettle with a polytetrafluoroethylene liner with a volume of 100 ml. The kettle was sealed and put into a thermostat at 140° C. for 8 hours. After natural cooling, the solid-liquid separation method was adopted by centrifugal washing, washed with distilled water or deionized water until the pH was neutral, and then vacuum-dried at 80°C for 10 hours to obtain MnO 2 One-dimensional nanomaterials.

[0022] MnO prepared by 2 Active material, acetylene black AB as conductive agent, polyvinylidene fluoride PVDF as binder, MnO 2 The mass ratio of AB:PVDF is 80:10:10 t...

Embodiment 3

[0027] In a 100 ml beaker, add 30 ml of distilled or deionized water, and dissolve 7.5 mmol of potassium permanganate in water to obtain solution a. In addition, 20 milliliters of distilled water or deionized water was added into a 100 milliliter beaker, and 11.25 millimoles of manganese acetate was dissolved in water to obtain solution b. Solution a and solution b were mixed, stirred, and transferred to a stainless steel hydrothermal reaction kettle with a polytetrafluoroethylene liner with a volume of 100 ml. The kettle was sealed and put into a thermostat at 150° C. for 6 hours. After natural cooling, adopt the method of centrifugal washing and solid-liquid separation, wash with distilled water or deionized water until the pH is neutral, and then vacuum dry at 100°C for 6 hours to obtain MnO 2 One-dimensional nanomaterials.

[0028] The as-prepared material was observed with a LEO1525 scanning electron microscope. Figure 5 shown. From Figure 5 It can be seen that the ...

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Abstract

The invention discloses a preparation method of manganese dioxide one-dimensional nanomaterial. The method comprises the following steps: 1. dissolving potassium permanganate in distilled water or deionized water, stirring to obtain a purple-red solution, wherein the concentration is 0.05mol / L-2.0mol / L; 2. dissolving manganese acetate in distilled water or deionized water, stirring to obtain a colorless and transparent solution, wherein the concentration is 0.05mol / L-3.0mol / L; 3. mixing and stirring the solution A and B obtained in the step 1 and 2, transferring the obtained solution in a stainless steel hydrothermal reaction tank with a polytetrafluoroethylene lining, reacting at 50-200 DEG C for 1-36h; and 4. after the reaction, performing natural cooling, and filtering, washing and drying the precipitate in turn to obtain the manganese dioxide one-dimensional nanomaterial. The method has the advantages that the process is simple, the raw materials are accessible, the cost is low, the pollution is low and is easy to perform purification treatment, the method is suitable for industrialization, etc.

Description

technical field [0001] The invention relates to a preparation method of a manganese dioxide one-dimensional nanometer material, in particular to a simple and convenient preparation method of a manganese dioxide one-dimensional nanomaterial used for a supercapacitor. Background technique [0002] At present, electrode materials for supercapacitors are mainly divided into three categories: carbon materials, metal oxides, and conductive polymers. Among them, metal oxide hydrated ruthenium oxide RuO 2 ·H 2 O has a large specific capacitance, but its high cost and environmental pollution limit its large-scale commercial production. while MnO 2 It has attracted people's attention because of its extensive resources, low price, environmental friendliness, and wide electrochemical window. It is a candidate electrode material with great potential for the development of supercapacitors. Now there are many methods for preparing nano-manganese dioxide, such as: sol-gel method, solid-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02B82B3/00H01G9/042
Inventor 刘恩辉杨艳静黄铮铮杜胜李玉华赵勇刚
Owner XIANGTAN UNIV
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