Porous hollow copper oxide nano fiber and preparation method thereof

A technology of nanofiber and copper oxide, applied in the direction of copper oxide/copper hydroxide, etc., to achieve the effect of simple method and low cost

Inactive Publication Date: 2012-05-16
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although both methods can obtain hollow nanofibers, the former requires multiple steps, and the latter requires a special and precise design of the spinning device, so there are still certain limitations
In addition, there are few reports on the preparation of porous hollow copper oxide nanofibers.

Method used

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  • Porous hollow copper oxide nano fiber and preparation method thereof
  • Porous hollow copper oxide nano fiber and preparation method thereof
  • Porous hollow copper oxide nano fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Dissolve copper acetate monohydrate in ethanol and sonicate until completely dissolved. Then add the molecular weight (M r ) is 360,000 polyvinylpyrrolidone and mixed to obtain a spinning solution.

[0034] In the spinning solution, the mass ratio of polyvinylpyrrolidone to copper acetate is 4:1, and the mass percent concentration of the polymer in the spinning solution is 9%.

[0035]2) Electrospin the spinning solution obtained in step 1) under a voltage electrostatic field, then raise the temperature in a muffle furnace to 500°C at a rate of 6.7°C / min, and sinter at 500°C for 2 hours to obtain a porous hollow Copper oxide nanofibers. Among them, the electrospinning conditions are as follows: the voltage is 10KV; the flow rate of the spinning solution is 0.02ml / min; the inner diameter of the spinneret is 0.8mm; the distance between the spinneret and the receiving plate is 13cm.

[0036] figure 1 It is a scanning electron micrograph of the nanofiber non-woven fa...

Embodiment 2

[0038] 1) Dissolve anhydrous copper acetate in ethanol, sonicate until completely dissolved, and then add molecular weight (M r ) is 360,000 polyvinylpyrrolidone and mixed to obtain a spinning solution.

[0039] In the spinning solution, the mass ratio of polyvinylpyrrolidone to copper acetate is 2:1, and the mass percent concentration of the polymer in the spinning solution is 15%.

[0040] 2) Electrospinning the spinning solution obtained in step 1) under a voltage electrostatic field, then raising the temperature to 500°C in a muffle furnace at a rate of 10°C / min, and sintering at 500°C for 3 hours to obtain a porous Hollow copper oxide nanofibers. Among them, the electrospinning conditions are as follows: the voltage is 10KV; the flow rate of the spinning solution is 0.05ml / min; the inner diameter of the spinneret is 0.8mm; the distance between the spinneret and the receiving plate is 13cm.

[0041] Figure 5 and Image 6 They are the scanning electron micrographs and ...

Embodiment 3

[0043] 1) Dissolve anhydrous copper acetate in ethanol and sonicate until completely dissolved. Then add the weight average molecular weight (M w ) of 50,000 vinylpyrrolidone-vinyl acetate copolymers were mixed to obtain a spinning solution.

[0044] In the spinning solution, the mass ratio of the copolymer to copper acetate is 8:1, and the mass percent concentration of the copolymer in the spinning solution is 15%.

[0045] 2) Electrospin the spinning solution obtained in step 1) under a voltage electrostatic field, then raise the temperature to 450°C in a muffle furnace at a rate of 5°C / min, and sinter at 450°C for 5 hours to obtain a porous Hollow copper oxide nanofibers. Among them, the electrospinning conditions are as follows: the voltage is 10KV; the flow rate of the spinning solution is 0.02ml / min; the inner diameter of the spinneret is 0.5mm; the distance between the spinneret and the receiving plate is 13cm.

[0046] Figure 7 and Figure 8 They are the scanning...

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Abstract

The invention discloses a porous hollow copper oxide nano fiber and a preparation method thereof. The method comprises the following steps: 1) dissolving a copper salt and a polymer into ethanol so as to obtain a spinning solution; 2) carrying out electrostatic spinning on the spinning solution obtained in the step 1), and then sintering after electrostatic spinning is finished, so as to obtain the porous hollow copper oxide nano fiber. Compared with the traditional template method and coaxial electrostatic spinning method, the method disclosed by the invention is simple and practicable, and low in cost, and the obtained material is novel in structure and has an important potential application in the fields of preparations of catalysts, gas sensors or semiconductors and the like.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and relates to a porous hollow nanofiber and a preparation method thereof, in particular to a porous hollow copper oxide nanofiber and a preparation method thereof. Background technique [0002] Due to its special structure and excellent chemical properties, one-dimensional metal oxide nanomaterials are widely used in sensors, optoelectronics, and catalysts. The research on their preparation and properties has always attracted much attention. As a kind of metal oxide, copper oxide exhibits unique properties in catalysis, desulfurization, and sterilization. At the same time, copper oxide nanofibers are one-dimensional intrinsic p-type semiconductor materials with narrow energy band width (1.2eV ), has a wide range of uses in field effect transistors, photoelectric conversion, etc., so it has become a research hotspot. Traditional methods for preparing copper oxide nanofibers include: elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02
Inventor 向海帆余晓兰龙宇华张小莉赵宁徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI
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