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Cobaltosic oxide bead-chain-shaped fiber and preparation method thereof

A technology for cobalt tetroxide beads and fibers, which is applied in the chemical characteristics of fibers, chemical post-processing of rayon, textiles and papermaking, etc., can solve the problem of unobtained one-dimensional structure of cobalt tetroxide, achieves wide application prospects, simple and controllable preparation process, tight connection effect

Inactive Publication Date: 2015-07-15
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN103643350A prepared Co by electrospinning 3 o 4 / In 2 o 3 Composite structure, but it obtains a tubular structure, and it is a composite structure of two substances, and does not produce a single-component one-dimensional structure of cobalt tetroxide

Method used

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  • Cobaltosic oxide bead-chain-shaped fiber and preparation method thereof
  • Cobaltosic oxide bead-chain-shaped fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1.1 Weigh 0.5 g Co(NO 3 ) 2 ·6H 2 O was added to a beaker containing 12 mL of N, N dimethylformamide, and stirred until the cobalt source was completely dissolved;

[0026] 1.2 Add 1.5 g of PVP to the solution prepared in 1.1, and stir to obtain a transparent and uniform spinning dope with a certain viscosity;

[0027] 1.3 Put the spinning solution obtained in 1.2 into a syringe, use a needle with a diameter of 0.6 mm as the spinneret for spinning, the voltage of the electrospinning process is 15 kV, the distance between the needle and the receiving plate is 12 cm, and the spinning The propulsion speed of the liquid is 0.42 mL / h, and a certain receiving device is used to receive the Co(NO 3 ) 2 / PVP composite nanofiber;

[0028] 1.4 Put the composite nanofibers obtained in 1.3 into a programmable temperature-controlled furnace, and adopt the segmental calcination method, that is, the first stage uses a heating rate of 1°C / min to heat to 400°C, and the second stage ...

Embodiment 2

[0030] 2.1 Weigh 0.6 g Co(NO 3 ) 2 ·6H 2 O was added to a beaker containing 12 mL of N, N dimethylformamide, and stirred until the cobalt source was completely dissolved;

[0031] 2.2 Add 2 g of PVP to the solution prepared in 2.1, and stir to obtain a transparent and uniform spinning stock solution with a certain viscosity;

[0032] 2.3 Put the spinning stock solution obtained in 2.2 into a syringe, use a needle with a diameter of 0.8 mm as the spinneret for spinning, the voltage of the electrospinning process is 12 kV, and the distance between the needle and the receiving plate is 15 cm. The propulsion speed of the liquid is 0.84 mL / h, and a certain receiving device is used to receive the Co(NO 3 ) 2 / PVP composite nanofiber;

[0033] 2.4 Put the composite nanofibers obtained in 2.3 into a programmable temperature-controlled furnace, and adopt the segmental calcination method, that is, the first stage uses a heating rate of 1 °C / min to heat to 300 °C, and the second sta...

Embodiment 3

[0035] 3.1 Weigh 0.66 g Co(NO 3 ) 2 ·6H 2 O was added to a beaker containing 12 mL of N, N dimethylformamide, and stirred until the cobalt source was completely dissolved;

[0036] 3.2 Add 2 g of PVP to the solution configured in 3.1, and stir to obtain a transparent and uniform spinning stock solution with a certain viscosity;

[0037]3.3 Put the spinning solution obtained in 3.2 into a syringe, use a needle with a diameter of 0.7 mm as the spinneret for spinning, the voltage of the electrospinning process is 15 kV, and the distance between the needle and the receiving plate is 15 cm. The propulsion speed of the liquid is 0.84 mL / h, and a certain receiving device is used to receive the Co(NO 3 ) 2 / PVP composite nanofiber;

[0038] 3.4 Put the composite nanofibers obtained in 3.3 into a programmable temperature-controlled furnace, and adopt a segmented calcination method, that is, the first stage uses a heating rate of 5°C / min to heat to 300°C, and the second stage adopt...

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Abstract

The invention relates to a cobaltosic oxide bead-chain-shaped fiber and a preparation method thereof. The preparation method comprises the following steps: adding a cobalt source to N,N-dimethylformamide (DMF), and fully stirring till the cobalt source is completely solved; and adding polyvinylpyrrolidone (PVP) to the solution, stirring to obtain a spinning solution, spinning the spinning solution by utilizing an electrostatic spinning technique to obtain fibers, and forging fiber samples to obtain the cobaltosic oxide bead-chain-shaped fiber. According to the cobaltosic oxide bead-chain-shaped fiber and the preparation method thereof, the one-step electrostatic spinning technique is utilized; a bead-chain-shaped structure is formed by controlling the property of a precursor raw material; the process is simple; the bead-chain-shaped structure is a one-dimensional structure formed by connecting Co3O4 monocrystal grains of similar granularity, the diameter is distributed uniformly, the shape is regular, the grains are completely exposed and are connected closely, and the specific surface area is relatively large; the cobaltosic oxide bead-chain-shaped fiber and the preparation method thereof have the wide application prospect in the fields of battery electrode materials, chemical catalysts, gas sensing and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a bead chain fiber of tricobalt tetroxide and a preparation method thereof. Background technique [0002] Cobalt tetroxide (Co 3 o 4 ) is a mixed valence compound that also contains Co 2+ and Co 3+ , which is a cubic crystal system and belongs to AB 2 o 4 spinel structure. It is a typical magnetic p-type semiconductor with a large theoretical capacity (up to 890mAh / g, much higher than graphite), and it is a potential carbon negative electrode replacement material. At the same time, cobalt tetroxide is also a very good functional material, which has very broad application prospects in the fields of battery electrodes, supercapacitors, gas sensors, and chemical catalysis. [0003] Compared with the traditional preparation process, electrospinning technology has become one of the most important methods to effectively prepare one-dimensional nanomateria...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08D01F11/00
Inventor 杨萍刘运时
Owner UNIV OF JINAN
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