A kind of preparation method of piezoelectric photocatalytic composite fiber

A composite fiber and photocatalytic technology, which is applied in the field of ceramic nanofibers, can solve the problems of reducing photocatalytic reaction efficiency and less interface exposure, and achieve the effect of improving photocatalytic reaction efficiency, improving mechanical properties, and broad application prospects

Active Publication Date: 2019-03-22
XIAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

But there is also BiFeO 3 coated TiO 2 Nanotubes, the problem of less exposed interface between the two reduces the photocatalytic reaction efficiency at the interface

Method used

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  • A kind of preparation method of piezoelectric photocatalytic composite fiber
  • A kind of preparation method of piezoelectric photocatalytic composite fiber
  • A kind of preparation method of piezoelectric photocatalytic composite fiber

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preparation example Construction

[0038] A kind of preparation method of piezoelectric photocatalytic composite fiber of the present invention, specifically implement according to the following steps:

[0039] Step 1. Prepare raw materials;

[0040] Prepare photocatalytic nanofibers, spinnable polymer A, solvent A, piezoelectric ceramic precursor, spinnable polymer B and solvent B;

[0041]Photocatalytic nanofibers as TiO 2 Nanofibers, ZnO nanofibers, SnO 2 nanofibers or CdS nanofibers;

[0042] The diameter of the photocatalytic nanofiber is 80nm-150nm, and the aspect ratio of the photocatalytic nanofiber is 5-20.

[0043] Step 2, preparing spinning solution;

[0044] Firstly, the spinnable polymer A is added to the solvent A, and mixed uniformly to obtain a polymer solution, and then photocatalytic nanofibers are added to the polymer solution to prepare a casing spinning solution;

[0045] The material composition of the shell spinning solution in terms of mass percentage is: 10%-25% of photocatalytic n...

Embodiment 1

[0065] Preparation of BaTiO 3 -TiO 2 Piezoelectric photocatalytic composite fiber

[0066] Firstly, TiO with a diameter of 80nm and an aspect ratio of 10 was taken. 2 nanofibers; then completely dissolve 1gPVP (polyvinylpyrrolidone) in 10mL absolute ethanol, and add 1.1gTiO 2 After nanofibers, the shell spinning solution was prepared; 1.215g PVP was completely dissolved in a mixed solution consisting of 4mL acetic acid and 6mL absolute ethanol, and 1.672g barium acetate and 1.861g isopropyl titanate were added to make the inner core spinning solution liquid;

[0067] Then put the obtained shell spinning solution and inner core spinning solution into the propulsion pump, adjust the spinning voltage to 20kv, the receiving distance is 18cm, the spinning temperature is 20°C, the humidity is 10%, and the casing spinning solution advances the speed 0.3mL / h, the propulsion speed of the inner core spinning solution is 0.15mL / h, and coaxial electrospinning is carried out to obtain ...

Embodiment 2

[0071] Preparation of BiFeO 3 -ZnO piezoelectric photocatalytic composite fiber

[0072] First get the ZnO nanofibers with a diameter of 90nm and an aspect ratio of 20; then completely dissolve 3.436gPS (polystyrene) in 10mLDMF, and add 4.295gZnO nanofibers to obtain a shell spinning solution; completely dissolve 1.050gPVP in In the mixed solution that is made up of 3mL ethylene glycol methyl ether, 5mLDMF and 2mL acetone, and add 1.789g bismuth nitrate and 1.099g ferric nitrate to make inner core spinning solution;

[0073] Then put the obtained shell spinning solution and inner core spinning solution into the propulsion pump, adjust the spinning voltage to 24kv, the receiving distance is 20cm, the spinning temperature is 25°C, the humidity is 20%, and the shell spinning solution advances the speed 0.2mL / h, the propulsion speed of the inner core spinning solution is 0.2mL / h, and coaxial electrospinning is carried out to obtain the precursor composite fiber;

[0074] Afterwa...

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Abstract

The invention discloses a preparation method of piezoelectric photocatalysis complex fiber. The method comprises the following steps: step 1, preparation of raw materials; step 2, preparation of a spinning solution; step 3, coaxial electrostatic spinning; step 4, calcination treatment; and step 5, fiber polarization treatment. The method can be used for obtaining a combined interface of a piezoelectric material, which has high density and is exposed on the surface of the fiber, and a photocatalyst, the internal electric field action of an interface of the piezoelectric material and the photocatalyst is fully utilized, and photoproduction electrons and a hole can be effectively driven to separate, so that the photocatalytic reaction efficiency is efficiently improved.

Description

technical field [0001] The invention belongs to the technical field of ceramic nanofibers, and relates to a preparation method of piezoelectric photocatalytic composite fibers. Background technique [0002] Semiconductor photocatalytic materials such as TiO 2 , ZnO, etc. have the advantages of non-toxicity, good chemical stability, large specific surface area, strong oxidation ability, and high catalytic activity. There are also many problems in the use process, such as narrow response range, high recombination rate of photogenerated electrons and holes, and short carrier lifetime, which all lead to low photocatalytic efficiency. In recent years, researchers have found that compound modification of photocatalytic materials and the construction of internal electric fields can effectively promote the separation of photogenerated electrons and holes and improve the efficiency of photocatalytic reactions. [0003] Piezoelectric ceramic fibers can realize mutual conversion of m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/10D01F1/10B01J35/06B01J23/02B01J23/843B01J23/18B01J23/06
CPCB01J23/002B01J23/02B01J23/06B01J23/18B01J23/8437B01J35/004B01J35/06B01J2523/00D01F1/10D01F9/10B01J2523/25B01J2523/27B01J2523/47B01J2523/54B01J2523/842
Inventor 汤玉斐刘照伟赵康
Owner XIAN UNIV OF TECH
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