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Controllable preparation method of alpha-manganese dioxide nanowire

A manganese dioxide nanometer and manganese dioxide brown technology are applied in the field of controllable preparation of α-manganese dioxide nanowires, which can solve problems such as not being obtained, and achieve product safety, simple experimental equipment requirements, and strong operability. Effect

Inactive Publication Date: 2015-05-20
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in the hydrothermal method using ethanol as a reducing agent, nanowire-shaped α-MnO has not been obtained. 2

Method used

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  • Controllable preparation method of alpha-manganese dioxide nanowire
  • Controllable preparation method of alpha-manganese dioxide nanowire
  • Controllable preparation method of alpha-manganese dioxide nanowire

Examples

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Embodiment 1

[0037] Raw materials: potassium permanganate, KMnO 4 , 99.5%; Ethanol, C 2 h 5 OH, 99.7%; distilled water.

[0038] Prepare 24mL potassium permanganate aqueous solution, then add 56mL ethanol to the prepared potassium permanganate solution and mix evenly, the concentration of potassium permanganate in the mixed solution is 0.1mol / L. Then transfer the prepared mixed solution into a 100 mL Teflon-lined reaction kettle at room temperature. Close the reaction kettle, put it in an oven at 120°C for 2 hours, take it out for cooling and filtration, wash the precipitate several times and dry it to obtain α-manganese dioxide brown powder with a diameter of 10-14nm and a length of 100-140nm.

Embodiment 2

[0040] Raw materials: potassium permanganate, KMnO 4 , 99.5%; Ethanol, C 2 h 5 OH, 99.7%; distilled water.

[0041] Prepare 35mL potassium permanganate aqueous solution, then add 45mL ethanol into the prepared potassium permanganate solution and mix evenly, the concentration of potassium permanganate in the mixed solution is 0.005mol / L. Then transfer the prepared mixed solution into a 100 mL Teflon-lined reaction kettle at room temperature. Close the reaction kettle, put it in an oven at 120°C for 2 hours, take it out for cooling and filtration, wash the precipitate several times and then dry it to obtain α-manganese dioxide brown powder with a diameter of 10-12nm and a length of 100-130nm.

Embodiment 3

[0043] Raw materials: potassium permanganate, KMnO 4 , 99.5%; Ethanol, C 2 h 5 OH, 99.7%; distilled water.

[0044] Prepare 40 mL of potassium permanganate aqueous solution, and then add 40 mL of ethanol into the prepared potassium permanganate solution and mix evenly. The concentration of potassium permanganate in the mixed solution is 0.01 mol / L. Then transfer the prepared mixed solution into a 100 mL Teflon-lined reaction kettle at room temperature. Close the reaction kettle, put it in an oven at 120°C for 2 hours, take it out for cooling and filtration, wash the precipitate several times and dry it to obtain α-manganese dioxide brown powder with a diameter of 10-13nm and a length of 100-130nm.

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Abstract

The invention discloses a controllable preparation method of an alpha-manganese dioxide nanowire. The alpha-manganese dioxide nanowire can be directly synthesized by using a hydrothermal method, or the alpha-manganese dioxide nanowire of which the diameter is 10-75nm and the length is 0.1-1mu m can be prepared through controllable thermal treatment within the temperature range of 150-750 DEG C. By adopting the controllable preparation method, no acid reducing agent is needed, the experiment equipment is simple in requirement and high in controllability, and the diameter and the length of the prepared alpha-manganese dioxide nanowire can be controlled. The alpha-manganese dioxide nanowire prepared by using the method can be used as an electrode material of a super capacitor and an ionic battery, an electric catalyst of a lithium-air battery, a water oxidation catalyst for energy storage, and an adsorption material and a denitration catalytic material for environment protection.

Description

technical field [0001] The invention relates to the field of supercapacitor and ion battery electrode materials and denitrification catalytic materials, in particular to a controllable preparation method of α-manganese dioxide nanowires. Background technique [0002] Manganese dioxide is an oxide with a relatively complex lattice structure. Among the various known manganese dioxides, most of them are mixed crystal forms, and MnO is commonly used. x To represent its molecular formula (where x is the oxygen content, its value is always less than 2), the degree of oxidation and water content are variable. [0003] The skeleton structure of manganese dioxide is [MnO 6 ] octahedron, the oxygen atoms are at the vertices of the octahedron, and the manganese atom is at the center of the octahedron, [MnO 6 ]Octahedrons are based on oxygen atoms forming hexagonal close packing or cubic close packing. In a close-packed structure, the individual atomic layers form tetrahedral and oct...

Claims

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Application Information

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IPC IPC(8): C01G45/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G45/02C01P2002/01C01P2002/72C01P2004/16C01P2004/04
Inventor 胡秀兰朱寿凤
Owner NANJING UNIV OF TECH
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