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Porous supported electrospun nano photocatalytic fiber membrane and preparation method thereof

A nano-light and fiber film technology, applied in the field of nano-materials, can solve the problems of small specific surface area of ​​fiber film materials, limited photocatalyst, limited catalytic degradation efficiency, etc., and achieve the effects of low cost, environmental safety and easy operation

Active Publication Date: 2018-11-20
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention combines photocatalysis, adsorption and filtration performance. Under the irradiation of visible light, the waste water is directly absorbed and degraded through the fiber membrane. In the preparation method, tetrabutyl titanate is used to prepare the composite fiber membrane material by roasting. The fiber membrane material The specific surface area is small, and the photocatalyst is limited, so the catalytic degradation efficiency is limited

Method used

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  • Porous supported electrospun nano photocatalytic fiber membrane and preparation method thereof
  • Porous supported electrospun nano photocatalytic fiber membrane and preparation method thereof
  • Porous supported electrospun nano photocatalytic fiber membrane and preparation method thereof

Examples

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Effect test

Embodiment 1

[0040] A method for preparing a porous loaded electrospun nanometer photocatalytic fiber membrane, specifically comprising the following steps:

[0041] (1) Polyacrylonitrile (PAN), polyvinylpyrrolidone (PVP) and nano titanium dioxide (TiO 2 ) are directly dissolved in the solvent together to carry out the configuration of the electrospinning solution, wherein, the relative solvent of PAN is 18wt.%, the relative solvent of PVP is 1wt.%, and nanometer TiO 2 The relative solvent is 6wt.%, and nano-TiO 2 It is anatase type, the particle size is 5nm, and the solvent is dimethylformamide (DMF);

[0042] (2) Vigorously stir the solution in step (1) at a temperature of 40°C for 20 hours, then cool the stirred solution to obtain an electrospinning solution. The electrospinning solution needs to be naturally cooled to room temperature reuse;

[0043] (3) Put the electrospinning solution prepared in the above step (2) into a 5mL syringe, and control the extrusion speed to 0.1mL / h thr...

Embodiment 2

[0049] A method for preparing a porous loaded electrospun nanometer photocatalytic fiber membrane, specifically comprising the following steps:

[0050] (1) Polyacrylonitrile (PAN), polyvinylpyrrolidone (PVP) and nano titanium dioxide (TiO 2 ) are directly dissolved in the solvent together to carry out the configuration of the electrospinning solution, wherein, the relative solvent of PAN is 12wt.%, the relative solvent of PVP is 8wt.%, and nano TiO 2 The relative solvent is 3.5wt.%, and nano-TiO 2 It is anatase type, the particle diameter is 8nm, and the solvent is dimethylacetamide (DMAc);

[0051] (2) Stir the solution in step (1) vigorously at a temperature of 55°C for 15 hours, then cool the stirred solution to obtain an electrospinning solution. The electrospinning solution needs to be naturally cooled to room temperature reuse;

[0052] (3) Put the electrospinning solution prepared in the above step (2) into a 10mL syringe, under the power supply high voltage of 14kV...

Embodiment 3

[0058] A method for preparing a porous loaded electrospun nanometer photocatalytic fiber membrane, specifically comprising the following steps:

[0059] (1) Polyacrylonitrile (PAN), polyvinylpyrrolidone (PVP) and nano titanium dioxide (TiO 2 ) are directly dissolved in the solvent together to carry out the configuration of the electrospinning solution, wherein, the relative solvent of PAN is 6wt.%, the relative solvent of PVP is 14wt.%, and nano TiO 2 The relative solvent is 1wt.%, and nano-TiO 2 It is anatase type, the particle size is 10nm, and the solvent is dimethyl sulfoxide (DMSO);

[0060] (2) Vigorously stir the solution in step (1) at a temperature of 70°C for 10 hours, and then cool the stirred solution to obtain an electrospinning solution. The electrospinning solution needs to be naturally cooled to room temperature reuse;

[0061] (3) Put the electrospinning solution prepared in the above step (2) into a 10mL syringe, under the power supply high voltage 10kV, c...

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Abstract

The invention relates to a porous supported electrospun nano photocatalytic fiber membrane and a preparation method thereof. According to the preparation method, nano titanium dioxide, polyacrylonitrile (PAN) and polyvinylpyrrolidone (PVP) are dissolved in a solvent to obtain an electrospinning solution, a nano photocatalytic fiber membrane loaded with the nano titanium dioxide is obtained throughelectrospinning, and after water treatment is carried out on the nano photocatalytic fiber membrane, the PVP is dissolved out to obtain the porous supported electrospun nano photocatalytic fiber membrane. The porous supported electrospun nano photocatalytic fiber membrane and the preparation method thereof have the advantages that the method is simple, the operation is easy, the cost is low, theprepared photocatalytic fiber membrane has the characteristics of high porosity and large specific surface area, the contact area between the photocatalytic fiber membrane and reactant is effectivelyincreased, the photocatalytic degradation efficiency is increased, the photocatalytic efficiency reaches up to 90% or above, the removal rate of methylene blue can reach up to 93% or above, electrospun nanofiber serves as a carrier to fix the photocatalyst titanium dioxide, thereby preventing the catalyst from being lost and recycling the catalyst, and the photocatalytic effect is permanent.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a porous loaded electrostatic spinning nanometer photocatalytic fiber membrane and a preparation method thereof. Background technique [0002] The problem of environmental pollution is becoming more and more serious. A large amount of pollutants are discharged into the environment, releasing toxic or even carcinogenic substances. People use various physical and chemical methods, such as precipitation, adsorption, reverse osmosis, ultrafiltration, etc. to treat harmful substances Separation, but these technologies only transfer these pollutants from the water body to other locations such as silt, and do not eradicate these pollutants, thus causing new pollution. [0003] Photocatalytic materials are mostly semiconductor materials, and a series of oxidation-reduction reactions will occur under the condition of light. Commonly used titanium dioxide is non-toxic, cheap, ...

Claims

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Application Information

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IPC IPC(8): D04H1/728D04H1/4382D06B13/00D06B15/00D01F6/54D01F1/10
CPCD01F1/10D01F6/54D04H1/4382D04H1/728D06B13/00D06B15/00
Inventor 王琛赵甜甜王军路思娴刘静颜琨
Owner XI'AN POLYTECHNIC UNIVERSITY
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