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Method for preparing manganese sesquioxide one dimension nano material

A technology of manganese trioxide and nanomaterials, applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of large size of nanomaterials, limited process design, high production cost, etc., achieve uniform size, simplified process, and reduce production cost Effect

Inactive Publication Date: 2009-09-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventor found in subsequent process research that when using the process provided by this patent to prepare nanowires or nanobelts such as ZnO, the size of the nanomaterials will be too large due to the increase in the heat preservation stage, and the process is relatively Complicated and expensive to manufacture
At the same time, in terms of raw material selection, if it is limited to metal acetate and polyvinyl alcohol, it will limit the design of the process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a quartz beaker, dissolve 4g of polyvinyl alcohol in 100ml of deionized water in a water bath or heating at 75-95°C; add 2g of manganese chloride, stir for 0.5h with magnetic force at 800 rpm, and use 40KHz, 150W Ultrasonic dispersion of 0.5h. Spread the quartz glass substrate flat on the bottom of the quartz beaker. Then place the quartz beaker in an oven and raise the temperature to 120°C at a rate of 5°C / min, and keep it warm for 0.5h until it is dried. The sample was transferred to a box-type resistance furnace, heated at a rate of 5 °C / min to 300 °C for 0.5 h; heated to 550 °C at a rate of 5 °C / min, and kept for 1 h. SEM observation revealed that nanowires with a diameter of 30 to 50 nm and a length of more than 15 μm were formed on the substrate.

Embodiment 2

[0024] This example is similar to Example 1, except that the amount of manganese acetate and gelatin in step 2 is 4g, the temperature is raised to 130°C at a rate of 10°C / min, and the temperature is kept for 0.5h until drying. The sample was transferred to a box-type resistance furnace, heated at a rate of 10 °C / min to 310 °C for 0.5 h; heated to 560 °C at a rate of 10 °C / min, and kept for 1 h. SEM observation revealed that the product was a nanorod with a diameter of about 50-80 nm and a length of 10 μm.

Embodiment 3

[0026] This example is similar to Example 1, except that the amount of manganese nitrate and gelatin in step 2 is 4g and 2g, and the temperature is raised to 150°C at a rate of 15°C / min, and kept for 1h until drying. Transfer the sample to a box-type resistance furnace, heat at 310°C at a rate of 15°C / min for 1 hour; raise the temperature to 560°C at a rate of 15°C / min, and hold for 3 hours. SEM observation revealed that the product was a nanorod with a diameter of about 80-100 nm and a length of 10 μm.

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Abstract

The invention relates to a method for preparing manganese sesquioxide one dimension nano material, comprising the process: organic complex aqueous solution with the mass concentration of 1-6% is prepared; metal salt containing manganese element and the organic complex aqueous solution are evenly mixed with each other according to the mass ratio of 1:5-5:1; a base plate is dipped into the mixed solution and tiled at the bottom of the solution; the mixed solution with the base plate is put into a baking oven and heated up to 120-150 DEG C at the speed of 5-20 DEG C / min and then the temperature is maintained for 0.5-3h; the manufactured sample is transferred into a box-type resistance furnace and heated up to 290-310 DEG C at the speed of 5-20 DEG C / min, then the temperature is maintained for 0.5-1h; the temperature is risen to 530-560 DEG C at the speed of 5-20 DEG C / min, and temperature is maintained for 0.5-3h; finally, the manganese sesquioxide one dimension nano material is formed on the base plate. The technique provided by the invention can be used for preparing the nano material with smaller and more uniform size; the method is also further simplified, and the optional scope of the raw materials is wider, thus further reducing the manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of one-dimensional nanometer materials, relates to a method for preparing one-dimensional nanometer material of manganese trioxide, and belongs to the technology of preparing one-dimensional nanometer material of manganese trioxide by sintering. Background technique [0002] Due to its small size and large specific surface area, nano-manganese oxide has unique properties different from ordinary manganese oxides, and its application in electrode materials, catalytic materials, ceramic materials and other fields has attracted great attention from scientists. For example, manganese oxide is used instead of manganese dioxide to solve the problem of mismatch between the positive and negative electrodes of the MH-MnO2 battery. Trimanganese tetraoxide is used as a raw material for preparing spinel Li2Mn2O4, which better solves the problem of battery discharge specific capacity fading. So far, the methods for prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02C03C17/25C04B41/50
Inventor 邹强张之圣李玲霞李付奎何凯王慧薛涛倪恒侃
Owner TIANJIN UNIV
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