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Method for preparing hexagonal phase YFeO3 nanometer fiber through electrostatic spinning

A nanofiber and electrospinning technology is applied in the field of preparing hexagonal YFeO3 nanofibers by electrospinning, which can solve the problems of less research on hexagonal phase, limited photocatalytic efficiency, small specific surface area, etc. Efficiency, shortening the transmission distance, increasing the effect of the specific surface area

Inactive Publication Date: 2016-01-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, more research is now on the orthorhombic phase structure, and less research on the hexagonal phase
At present, people have prepared hexagonal phase YFeO by sol-gel method, solvothermal method, self-propagating combustion method and microwave-assisted method. 3 Nanocrystals, but their size is large and the specific surface area is small, which limits the improvement of photocatalytic efficiency

Method used

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  • Method for preparing hexagonal phase YFeO3 nanometer fiber through electrostatic spinning
  • Method for preparing hexagonal phase YFeO3 nanometer fiber through electrostatic spinning
  • Method for preparing hexagonal phase YFeO3 nanometer fiber through electrostatic spinning

Examples

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example 1

[0021] 1. Preparation of Precursors

[0022] Weigh 0.614gFe(NO 3 ) 3 9H 2 O and 0.586gY (NO 3 ) 3 ·6H 2 O was added to 10ml of DMF, and after magnetically stirring at room temperature for 1h, 1.4g of PVP was added, and the magnetic stirring was continued for 4h and then allowed to stand for 1h to obtain a homogeneous, transparent and viscous precursor solution.

[0023] 2. Electrospinning process

[0024] Add the prepared solution into a 5ml syringe, and use a grounded 12mm needle # (needle inner diameter is 1.2mm) stainless steel injection needle, DC positive electric field is directly applied to the needle, and the receiving plate is grounded. The distance between the needle and the receiving plate is 10cm, the applied voltage is 20kV, the ambient temperature is 25-30°C, and the ambient humidity is 45%-50%. Under the action of high-voltage electric field force, the spinning solution is stretched and shaken by high frequency, and the solvent evaporates rapidly, and PV...

example 2

[0028] 1. Preparation of Precursors

[0029] Weigh 0.307gFe(NO 3 ) 3 9H 2 O and 0.293gY (NO 3 ) 3 ·6H 2 O was added to 10ml of DMF, and after magnetically stirring at room temperature for 1h, 1.4g of PVP was added, and the magnetic stirring was continued for 4h and then allowed to stand for 1h to obtain a homogeneous, transparent and viscous precursor solution.

[0030] 2. Electrospinning process

[0031] Add the prepared solution into a 5ml syringe, and use a ground 7 # (needle inner diameter is 0.7mm) stainless steel injection needle, DC positive electric field is directly applied to the needle, and the receiving plate is grounded. The distance between the needle and the receiving plate is 13cm, the applied voltage is 18kV, the ambient temperature is 25-30°C, and the ambient humidity is 45%-50%. Under the action of high-voltage electric field force, the spinning solution is stretched and shaken by high frequency, and the solvent evaporates rapidly, and PVP / (ferric ni...

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Abstract

The invention provides a method for preparing hexagonal phase YFeO3 nanometer fiber through electrostatic spinning. The method includes the following steps of adding iron nitrate nonahydrate and yttrium nitrate hexahydrate to an appropriate amount of N,N-dimethyl formamide to be evenly stirred with the molar ratio of Fe to Y being 1 to 1, then adding polyvinylpyrrolidone to be evenly stirred to prepare a precursor solution, putting the prepared precursor solution into an injector, directly adding a DC positive electric field on a needle, making a receiving plate grounded, and obtaining original PVP / (ferric nitrate+yttrium nitrate) fiber under the effect of high-voltage electric field force to be sintered. The method is low in cost, convenient to operate, capable of achieving continuous production, uniform in fiber diameter and capable of conducting adjustment by changing process conditions.

Description

technical field [0001] The invention belongs to the field of functional materials and relates to the preparation of hexagonal phase YFeO by an electrospinning method 3 Preparation methods of nanofibers. Background technique [0002] The sustainable development of human beings in the 21st century is faced with two major problems of environment and energy. Solar energy has the advantages of being cheap, clean, and renewable. Therefore, the efficient use of solar energy is the goal of people's efforts. Semiconductor photocatalysis technology can convert solar energy into chemical energy, and it is expected to solve these two problems through photohydrolysis technology and photocatalytic degradation of toxic organic substances. Nowadays, photocatalytic technology has been successfully applied in many fields such as wastewater treatment, air purification, self-cleaning surfaces, dye-sensitized solar cells, and antibacterial. So far, people have discovered many kinds of photoca...

Claims

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Application Information

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IPC IPC(8): D01F9/08
Inventor 何芳
Owner TIANJIN UNIV