Solvothermal preparation method for alkali manganese oxide nanowires

A manganese oxide nano and solvothermal technology, applied in manganese oxide/manganese hydroxide, nanotechnology and other directions, can solve the problems of unfriendly environment and complicated preparation methods, and achieve the effects of single morphology, good dispersion and uniform size

Inactive Publication Date: 2012-06-20
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires the addition of surfactants or templates or some non-volatile and toxic solvents, the preparation method is more complicated, and the environment is not friendly

Method used

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  • Solvothermal preparation method for alkali manganese oxide nanowires
  • Solvothermal preparation method for alkali manganese oxide nanowires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 2 ml of 0.5 mol / L manganese sulfate solution and 4 ml of 0.5 mol / L potassium permanganate solution, and add to 4 ml of n-butanol aqueous solution with a volume ratio of 1:1, so that manganese sulfate and potassium permanganate After mixing, the molar ratio in the solution is 1:2, stir evenly. The mixed solution was transferred to an autoclave lined with polytetrafluoroethylene, and subjected to solvothermal reaction at a temperature of 140 °C for 6 h to obtain basic manganese oxide nanowires. like figure 1 As shown in the middle curve 1, all the diffraction peaks of the product can correspond to the standard peak of MnO(OH) at the bottom (JCPDS No. 41-1379). According to Scherrer's formula , it can be estimated that the size D in the 022 orientation is 46 nm.

Embodiment 2

[0021] Mix 2 ml of 1.0 mol / L manganese sulfate solution and 4 ml of 1.0 mol / L potassium permanganate solution, and add to 4 ml of n-butanol aqueous solution with a volume ratio of 1:1, so that manganese sulfate and potassium permanganate After mixing, the molar ratio in the solution is 1:2, stir evenly. The mixed solution was transferred to an autoclave lined with polytetrafluoroethylene, and subjected to solvothermal reaction at a temperature of 220 °C for 6 h to obtain basic manganese oxide nanowires. like figure 1 As shown in the middle curve 2, all the diffraction peaks of the product can correspond to the standard peak of MnO(OH) at the bottom (JCPDS No. 41-1379). According to Scherrer's formula , it can be estimated that the size D in the 022 orientation is about 54 nm.

Embodiment 3

[0023] Mix 4 ml of 1.0 mol / L manganese sulfate solution and 2 ml of 1.0 mol / L potassium permanganate solution, and add to 4 ml of n-butanol aqueous solution with a volume ratio of 1:1, so that manganese sulfate and potassium permanganate After mixing, the molar ratio in the solution is 2:1, stir evenly. The mixed solution was transferred to an autoclave lined with polytetrafluoroethylene, and subjected to solvothermal reaction at a temperature of 160 °C for 24 h to obtain basic manganese oxide nanowires. like figure 1 As shown in the middle curve 3, all the diffraction peaks of the product can correspond to the standard peak of MnO(OH) at the bottom (JCPDS No. 41-1379). According to Scherrer's formula , it can be estimated that the size D in the 022 orientation is about 48 nm. The morphology of the samples was observed using a JEOL 2010 high-resolution transmission electron microscope scanner (accelerating voltage 200 kV), as shown in figure 2 shown. from figure 2 It ...

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Abstract

The invention discloses a solvothermal preparation method for alkali manganese oxide nanowires. Manganese sulfate aqueous solution with the concentration of 0.5 to 2.0 mol/L and potassium permanganate aqueous solution with the concentration of 0.5 to 2.0 mol/L are mixed, wherein molar ratio of manganese sulfate and potassium permanganate ranges from 1/3 to 4, n-butyl alcohol aqueous solution with the volume ratio of 1/2 to 2 is added, the solution is evenly mixed, at the temperature of 120 to 220 DEG C, the solution is subjected to solvothermal reaction for 6 to 24 hours, and then alkali manganese oxide nanowires are obtained. The solvothermal preparation method for alkali manganese oxide nanowires is simple in process operation and environment-friendly. Products can be obtained directly in the solution at a low temperature without roasting. The obtained alkali manganese oxide is high in purity, narrow in size distribution and good in dispersity, and the alkali manganese oxide nanowires are suitable for industrial production. The solvothermal preparation method for alkali manganese oxide nanowires is capable of preparing high-purity and fine alkali manganese oxide nanowires suitable for industrial production without surface active agents and templates.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanometer materials, and in particular relates to a method for preparing basic manganese oxide nanowires by solvothermal. Background technique [0002] Basic manganese(III) oxide, namely MnO(OH), can be read as manganese oxyhydroxide, which is usually an electrode reaction product obtained by manganese dioxide absorbing hydrogen in zinc-manganese dry batteries and getting electrons and being reduced. Basic manganese oxide is a solid black powder at normal temperature and pressure. It is a very important solid substance. After oxidation or reduction, it can be made into an important raw material for the production of manganese-zinc ferrite soft magnetic materials in the electronics industry. It is also widely used in ion exchange materials, electrochromic materials, electrochemical materials and catalytic materials. [0003] In recent years, studies on nano-functional materials h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02B82Y40/00
Inventor 田俐李帅孙起亮
Owner HUNAN UNIV OF SCI & TECH
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