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Preparation method and application of MnO2 nanowire

A nanowire and reaction technology, which is applied in the field of MnO2 nanowire preparation, can solve the problems of high reaction temperature, long synthesis time, and restrictions on the popularization and application of materials, and achieve the effects of easy reaction conditions, simple methods, and reduced synthesis costs

Inactive Publication Date: 2018-07-13
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] So far, MnO 2 Nanowire materials have been based on MnCl 2 4H 2 O / KMnO 4 , MnSO 4 ·H 2 O / KMnO 4 The solution is prepared by hydrothermal method as raw material, but the reaction temperature is high (120-150°C) and the synthesis time is long (10-24h), which greatly increases the experimental cost and synthesis difficulty, and limits the further promotion of the material applications, thus developing a simple and feasible MnO 2 Nanowire synthesis method is very valuable

Method used

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  • Preparation method and application of MnO2 nanowire

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Embodiment 1

[0031] This embodiment relates to a kind of MnO 2 A method for preparing nanowires, comprising the steps of:

[0032] Preparation of polypyrrole:

[0033] Dissolve 0.294 g of methyl orange (MO) in 180 mL of FeCl 3 6H 2 O (1.44g) solution, then stirred and ultrasonically dispersed. Then, 330 μL of pyrrole monomer was added to the above suspension solution, and magnetically stirred at room temperature for 24 h, and a black precipitate was formed in the reaction. The black precipitate was washed with deionized water and absolute ethanol several times until the filtrate became colorless and neutral, and finally dried in a vacuum oven at 50° C. for 12 hours to obtain PPy (polypyrrole).

[0034] MnO 2 Preparation of nanowires:

[0035] 1) Add 0.265mlH 2 SO 4 Add to 30mlKMnO 4 (0.79g) solution, stirred evenly by magnetic force. Then, the above mixed solution was added to an aqueous solution (20 mL) in which 120 mg of polypyrrole powder was dissolved to form a pre-reaction s...

Embodiment 2

[0040] This embodiment relates to a kind of MnO 2 A method for preparing nanowires, comprising the steps of:

[0041] 1) Add 0.265mlH 2 SO 4 Add to 30mlKMnO 4 (0.79g) solution, stirred evenly by magnetic force. Then, the above mixed solution was added to an aqueous solution (20 mL) in which 80 mg of polypyrrole powder was dissolved to form a pre-reaction solution;

[0042] 2) Place the pre-reaction solution in a water bath at 80°C. In this step, the reaction time was controlled at 60 minutes. The synthesized sample was washed with deionized water and absolute ethanol, and finally the sample was dried in a vacuum oven at 60°C for 12 hours to obtain MnO 2 Nanowires.

Embodiment 3

[0044] This embodiment relates to a kind of MnO 2 A method for preparing nanowires, comprising the steps of:

[0045] 1) Add 0.265mlH 2 SO 4 Add to 30mlKMnO 4 (0.79g) solution, stir evenly by magnetic force. Then, the above mixed solution was added to an aqueous solution (20 mL) in which 140 mg of polypyrrole powder was dissolved to form a pre-reaction solution;

[0046] 2) Place the pre-reaction solution in a water bath at 85°C. In this step, the reaction time was controlled at 60 minutes. The synthesized sample was washed with deionized water and absolute ethanol, and finally the sample was dried in a vacuum oven at 60°C for 12 hours to obtain MnO 2 Nanowires.

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Abstract

The invention relates to a preparation method of a MnO2 nanowire. The preparation method includes the steps: taking KMnO4, concentrated sulfuric acid and home-made polypyrrole as raw materials; synthesizing the MnO2 nanowire at low temperature (85 DEG C) and in a short time (1h). According to the preparation method, synthesis cost can be effectively reduced, and the MnO2 nanowire is synthesized without high temperature and high pressure. The prepared MnO2 nanowire serving as an active material is applied to flexible carbon cloth to prepare an electrode, test is performed in 1mol / L of Na2SO4 electrolyte by three electrodes, specific capacitance reaches up to 85Fg<-1> when current density is 1Ag<-1>, and the MnO2 nanowire has excellent conductivity and cycling stability (capacitance retention rate is 98.6% in a thousand times of cycling when the current density is 5Ag<-1>).

Description

technical field [0001] The invention relates to the field of preparation of nanomaterials, in particular to a kind of MnO 2 Methods of preparing nanowires. Background technique [0002] As a continuously renewable energy storage method, supercapacitors have attracted great attention recently. It is capable of delivering higher power density than conventional chemical batteries and has higher energy density than conventional electrostatic capacitors. Electrode materials are an important factor determining the performance of supercapacitors, usually including carbon-containing materials (graphene, carbon nanotubes, carbon nanofibers, carbon clusters, etc.), metal oxides / hydroxides (titanium dioxide, manganese dioxide, Ferric oxide, etc.) and conductive polymers (polyaniline (PANI), polypyrrole (PPy), etc.). As one of the most important electrode materials, metal oxide semiconductors (MOSs) have ideal morphology and unique structure, and they are widely used in various scien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/46H01G11/86
CPCY02E60/13H01G11/24H01G11/46H01G11/86
Inventor 徐锡金何为东祝莉莉孙鹏霄王天露
Owner UNIV OF JINAN
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