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Method for preparing cobaltosic oxide single-dimensional nano material

A technology of cobalt tetroxide and nanomaterials, applied in the direction of cobalt oxide/cobalt hydroxide, etc., can solve the problems of large size of nanomaterials, limited process design, high production cost, and achieve the effects of uniform size, simplified process and reduced production cost.

Inactive Publication Date: 2009-09-16
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 cobalt 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 cobalt acetate and gelatin in step 2 is 4g, and the temperature is raised to 130°C at a rate of 10°C / min, and 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 dosage of cobalt 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 a cobaltosic oxide single-dimensional nano material, comprising the following steps: confecting organic complexation aqueous solution with mass concentration of 1-6%; uniformly mixing metal salt containing cobalt element and the organic complexation aqueous solution according to mass ratio of 1:5-5:1 between the metal salt and the organic complexing agent; soaking a substrate in the mixed solution, tiling the substrate at the bottom of the solution; putting the mixed solution provided with the substrate in a oven and heating up the mixed solution to 120-150 DEG C at the speed of 5-20 DEG C / min, preserving heat for 0.5-3h; transferring the prepared sample to a tank type resistance furnace, heating up the sample to 290-310 DEG C at the speed of 5-20 DEG C / min and preserving heat for 0.5-1h; heating up to 530-560 DEG C at the speed of 5-20 DEG C / min and preserving heat for 0.5-3h, forming the cobaltosic oxide single-dimensional nano material on the substrate. The technology provided by the invention can prepare more uniform nano materials with smaller size, the technology is also further simplified, and the raw material has wider selective range, thus further reducing the production 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 tricobalt tetroxide, and belongs to the technology of preparing one-dimensional nanometer material of three cobalt tetroxide by sintering. Background technique [0002] Because of its good physical and chemical properties, cobalt oxide is widely used in electrode materials, catalysts, electronics industry, magnetic materials, hard alloys, ceramics, etc. be widely used. The usual method for preparing cobalt tetroxide powder is to heat metal cobalt in air or water vapor, or to heat cobalt hydroxide, cobalt carbonate or cobalt oxalate under air-isolated conditions. The cobalt tetroxide powder particles prepared by these methods are relatively large, in the order of microns. With the development of nanotechnology, it is found that nanoparticles have many excellent characteristics different from bulk ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04C03C17/23
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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