Vanadium-doped strontium titanate nanofiber and preparation method and application thereof

A nanofiber, strontium titanate technology, applied in nanotechnology, nanotechnology, fiber chemical characteristics, etc., can solve problems such as poor electrical conductivity, and achieve the effect of improving piezoelectric performance, strong piezoelectric catalytic activity, and improving piezoelectric performance.

Active Publication Date: 2020-11-27
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that barium titanate and lead zirconate titanate are strong ferroelectrics with high piezoelectric coefficient and dielectric constant. However, these ferroelectrics are highly insulating and their conductivity is poor; one way to improve this shortcoming One solution is to replace insulating ferroelectrics with semiconducting materials with similar permanent polarization

Method used

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  • Vanadium-doped strontium titanate nanofiber and preparation method and application thereof
  • Vanadium-doped strontium titanate nanofiber and preparation method and application thereof
  • Vanadium-doped strontium titanate nanofiber and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Vanadium-doped strontium titanate nanofiber piezoelectric material (0.25 mol% V-SrTiO 3 NFs) preparation: firstly, 1 mmol of strontium nitrate and 0.0025 mmol of vanadyl acetylacetonate were dissolved in a solution containing 1.5 mL of ethanol, 1.5 mL of N,N-dimethylformamide, 1.5 mL of acetic acid, 1.5 mL of deionized water and tetratitanate Butyl ester solution, stirred until clear, then added 0.5g of polyvinylpyrrolidone, stirred at room temperature for 12 hours, injected the obtained transparent light yellow solution into the syringe for electrospinning, electrospinning equipment The vertical distance between the nozzle tip and the grounded stainless steel receiver and the electrospinning voltage were 15 cm and 15 kV, respectively; o C / min heating rate from room temperature to 550 o C, and then calcined for 3 hours to obtain vanadium-doped strontium titanate nanofiber piezoelectric material (0.25mol% V-SrTiO 3 NFs), wherein the molar ratio of strontium nitrate, ...

Embodiment 2

[0027] Vanadium-doped strontium titanate nanofiber piezoelectric material (0.5 mol% V-SrTiO 3 NFs) preparation: firstly, 1 mmol of strontium nitrate and 0.005 mmol of vanadyl acetylacetonate were dissolved in a solution containing 1.5 mL of ethanol, 1.5 mL of N,N-dimethylformamide, 1.5 mL of acetic acid, 1.5 mL of deionized water and tetratitanate Butyl ester solution, stirred until clear, then added 0.5 g of polyvinylpyrrolidone, stirred at room temperature for 12 hours, injected the obtained transparent light yellow solution into the syringe for electrospinning, electrospinning equipment The vertical distance between the nozzle tip and the grounded stainless steel receiver and the electrospinning voltage were 15 cm and 15 kV, respectively; o C / min heating rate from room temperature to 550 o C, and then calcined for 3 hours to obtain the vanadium-doped strontium titanate nanofiber piezoelectric material (0.5mol% V-SrTiO 3NFs), wherein the molar ratio of strontium nitrate, ...

Embodiment 3

[0029] Vanadium-doped strontium titanate nanofiber piezoelectric material (1.0 mol% V-SrTiO 3 NFs) preparation: firstly, 1 mmol of strontium nitrate and 0.01 mmol of vanadyl acetylacetonate were dissolved in a solution containing 1.5 mL of ethanol, 1.5 mL of N,N-dimethylformamide, 1.5 mL of acetic acid, 1.5 mL of deionized water and tetratitanate Butyl ester solution. After stirring until clear, 0.5 g of polyvinylpyrrolidone was added thereto, and after stirring at room temperature for 12 hours, the obtained transparent light yellow solution was injected into a syringe. The vertical distance between the nozzle tip of the electrospinning device and the grounded stainless steel receiver and the electrospinning voltage were 15 cm and 15 kV, respectively. After electrospinning, the obtained product was subjected to 2 o C / min heating rate from room temperature to 550 o C, and then calcined for 3 hours, the vanadium-doped strontium titanate nanofiber piezoelectric material (1.0 ...

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Abstract

The invention discloses vanadium-doped strontium titanate nanofiber. A preparation method of the vanadium-doped strontium titanate nanofiber includes the following steps that electrostatic spinning isconducted on a vanadium-doped strontium titanate electrostatic spinning precursor solution to obtain a fiber film; and the fiber film is calcined, and the vanadium-doped strontium titanate nanofiberis obtained, wherein the vanadium-doped strontium titanate electrostatic spinning precursor solution includes vanadium salt, strontium salt, titanium salt, high polymers and solvent. In construction of piezoelectric catalysis nanometer materials, the vanadium-doped strontium titanate nanofiber piezoelectric material has a non-centrosymmetry structure, is an excellent ferroelectric material, has aninternal space charge layer, can effectively generate piezoelectric inductive charges and has good piezoelectric performance, and under external ultrasonic vibration, the material can effectively degrade and remove organic pollutant in a water body.

Description

technical field [0001] The invention relates to the technical field of nano piezoelectric materials and piezoelectric catalysis, in particular to a preparation method of a vanadium-doped strontium titanate nanofiber piezoelectric material and its application to piezoelectric catalysis for removing organic pollutants in water bodies. Background technique [0002] In recent years, the piezoelectric effect caused by the piezoelectric polarization of piezoelectric materials has been widely used in sensors, nanogenerators, and piezoelectric field-effect transistors. In addition, the application of nanostructured piezoelectric materials in photocatalytic environmental remediation and water splitting has also attracted widespread attention, as the piezoelectric effect can enhance the separation of photogenerated carriers, thereby improving the performance of piezoelectric semiconductor catalysts. photocatalytic activity. Recently, researchers have discovered a new piezoelectric ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/10C02F1/36B01J23/22B01J35/06B01J37/34B01J37/08B82Y30/00B82Y40/00C02F101/30C02F101/34
CPCD01F9/10C02F1/36B01J23/22B01J23/002B01J35/0033B01J35/0013B01J35/06B01J37/342B01J37/082B82Y30/00B82Y40/00C02F2101/30C02F2101/345B01J2523/00B01J2523/24B01J2523/47B01J2523/55
Inventor 路建美李娜君
Owner SUZHOU UNIV
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