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In-situ preparation method of flexible piezoelectric photocatalysis nanofibers

A nanofiber, in-situ preparation technology, applied in chemical instruments and methods, nanotechnology, fiber processing, etc., can solve problems such as easy degradation, achieve high effective interface contact, reduce grain size, and reduce brittleness.

Active Publication Date: 2021-10-29
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PVDF is an organic material, which has the problem of easy degradation

Method used

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  • In-situ preparation method of flexible piezoelectric photocatalysis nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of BaTiO 3 -TiO 2 Composite Flexible Fiber Membrane

[0048] Put 1g of yttrium nitrate hexahydrate, 3.5g of isopropyl titanate, 1g of PVP, 6g of DMF and 2g of glacial acetic acid into the propulsion pump, adjust the spinning voltage to 12kv, and the receiving distance to 18cm. The silk temperature is 30°C, the humidity is 10%, the propulsion pump speed is 0.3mL / h, electrospinning is carried out, and then calcined at 550°C for 2h to obtain flexible TiO 2 Nanofibers;

[0049] Weigh 3g of butyl titanate according to Ba:Ti=1, add 10ml of glacial acetic acid and 10ml of absolute ethanol at room temperature, then add 1.456g of barium acetate aqueous solution dropwise under stirring, and stir for 30min to form a uniform and transparent mixed sol.

[0050] Flexible TiO 2 The fiber membrane was fixed on a spin coater, and a mass ratio of 0.1mol / L (CTAC:Ba(NO 3 ) 2 =7:3) The mixed solution is dropped onto the center of the film, and the spin coater rotates at a ...

Embodiment 2

[0053] Preparation of BaTiO 3 -ZnO Composite Flexible Fiber Membrane

[0054] Put 0.8g of yttrium nitrate hexahydrate, 3.5g of zinc nitrate, 1.5g of PVP, 6g of DMF and 2g of glacial acetic acid into the propulsion pump, adjust the spinning voltage to 12kv, and the receiving distance to 18cm. The temperature is 30°C, the humidity is 10%, the propulsion pump speed is 0.3mL / h, electrospinning is carried out, and then calcined at 550°C for 2 hours to obtain flexible ZnO nanofibers;

[0055] Weigh 3g of butyl titanate according to Ba:Ti=1, add 10ml of glacial acetic acid and 10ml of absolute ethanol at room temperature, then add 1.456g of barium acetate aqueous solution dropwise under stirring, and stir for 30min to form a uniform and transparent mixed sol.

[0056] The flexible ZnO fiber membrane was fixed on a spin coater, and a mass ratio of 0.1mol / L (CTAB:Ba(NO 3 ) 2 =3:2) The mixed solution is dropped onto the center of the film, and the spin coater rotates at a speed of 20...

Embodiment 3

[0059] Preparation of ZnO-TiO 2 Composite Flexible Fiber Membrane

[0060] Put 1g of yttrium nitrate hexahydrate, 3.5g of isopropyl titanate, 1g of PVP, 6g of DMF and 2g of glacial acetic acid into the propulsion pump, adjust the spinning voltage to 12kv, and the receiving distance to 18cm. The silk temperature is 30°C, the humidity is 10%, the propulsion pump speed is 0.3mL / h, electrospinning is carried out, and then calcined at 550°C for 2h to obtain flexible TiO 2 Nanofibers;

[0061] Select zinc acetate dihydrate as a precursor, ethylene glycol methyl ether as an organic solvent, and ethanolamine as a stabilizer, dissolve 3.78g of zinc acetate dihydrate in 4.3g of ethylene glycol methyl ether, then add equimolar ethanolamine, Stir well at 75°C for 2 hours to form a light yellow transparent solution with a zinc ion concentration of 0.5 mol / L.

[0062] Flexible TiO 2 The fiber membrane was fixed on a spin coater, and a mass ratio of 0.1mol / L (CTAC:Zn(NO 3 ) 2 =5:1) The...

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Abstract

The invention discloses an in-situ preparation method of flexible piezoelectric photocatalysis nanofibers. The in-situ preparation method is specifically implemented according to the following steps of carrying out electrostatic spinning and calcining to obtain flexible inorganic fibers with smooth surfaces and small grain sizes, drying the surfaces of the fibers under the action of a surfactant to form uniform island-shaped structures, and finally obtaining the composite flexible piezoelectric photocatalysis fibers with island-shaped piezoelectric plates on the surface of an intermediate photocatalyst by utilizing in-situ growth. The flexible inorganic piezoelectric photocatalysis nanofibers with good mechanical property and stability are obtained, have stronger durability and more cycle times under the action of a subsequent external load, and have wide application prospects in the fields of sewage treatment, air purification, antibiosis and disinfection, hydrogen production by photodecomposition of water and the like.

Description

technical field [0001] The invention belongs to the technical field of composite fiber preparation, and relates to an in-situ preparation method of flexible piezoelectric photocatalytic nanofibers. Background technique [0002] Environmental pollution and the shortage of clean energy have gradually become important reasons that threaten the sustainable development of human civilization and have attracted widespread attention from scholars around the world. Semiconductor photocatalysts can not only use solar energy to decompose water at room temperature to generate clean energy hydrogen, but also degrade harmful substances. They also have broad prospects in the field of energy and the environment, and are expected to solve global energy and environmental problems. However, one of the main problems existing in semiconductor photocatalytic technology is the low photocatalytic efficiency, and the separation efficiency of photogenerated carriers is one of the key factors determin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/46D06M11/44D01F9/08D01F9/10B82Y40/00B01J23/02B01J23/06B01J35/06D04H1/728
CPCD06M11/46D06M11/44D01F9/08D01F9/10B82Y40/00B01J23/02B01J23/06B01J23/002D04H1/728B01J2523/00B01J35/23B01J35/59B01J35/39B01J2523/25B01J2523/27B01J2523/47B01J2523/28Y02W10/37
Inventor 汤玉斐陈希刘照伟赵康赵敬忠
Owner XIAN UNIV OF TECH
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