A preparation method of photocatalytic composite fiber with strong adsorption

A composite fiber and photocatalytic technology, which is applied in the field of preparation of photocatalytic composite fibers, can solve the problems of weak adsorption effect, low specific surface area, and no obvious interface.

Active Publication Date: 2020-10-27
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing a photocatalytic composite fiber with strong adsorption, which solves the problems in the prior art that the photocatalytic composite has no obvious interface, low specific surface area and weak adsorption effect

Method used

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  • A preparation method of photocatalytic composite fiber with strong adsorption

Examples

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Embodiment 1

[0036] TiO with strong adsorption 2 -ZrO 2 Preparation of photocatalytic composite fibers:

[0037] Take 0.4g of carbon spheres with a particle size of 400nm-440nm and add it to an ammonia solution containing 0.8g of zirconium chloride and pH=11, take it out after a hydrothermal reaction at 200°C for 10 hours, and place the obtained sample in 6g of butyl titanate Immerse in a solution composed of 4g of absolute ethanol, and dry for 48 hours at room temperature;

[0038] Add 1.2g of spinnable polymer PVP to 8g of ethanol solvent, add 9g of butyl titanate and 1.8g of buffer glacial acetic acid, stir evenly, then add 0.6g of the obtained particles, stir for 30min, and ultrasonically disperse for 30min;

[0039] Put the obtained solution into the propulsion pump, adjust the electrospinning voltage to 30kv, the propulsion speed to 0.037ml / min, the receiving distance to 30cm, the spinning temperature at 45°C, and the humidity at 50%, and perform electrospinning to obtain the precu...

Embodiment 2

[0042] TiO with strong adsorption 2 -Y 2 o 3 Preparation of photocatalytic composite fibers:

[0043] Take 0.8g of carbon spheres with a particle size of 560nm-600nm and add them to an ammonia solution containing 1.6g of yttrium nitrate and pH=11, take them out after hydrothermal reaction at 180°C for 14 hours, and place the obtained sample in 8g of titanium isopropoxide and Immerse in a solution composed of 2g of glacial acetic acid, and dry at room temperature for 24 hours;

[0044] Add 2.4g of spinnable polymer polysulfoneamide to 12g of DMF solvent, add 5g of titanium isopropoxide and 0.6g of glacial acetic acid, stir well, then add 1.2g of the obtained particles, stir for 40min, and ultrasonically disperse for 20min;

[0045] Put the obtained solution into the propulsion pump, adjust the electrospinning voltage to 25kv, the propulsion speed to 0.025ml / min, the receiving distance to 18cm, the spinning temperature at 10°C, and the humidity at 10%, and perform electrospin...

Embodiment 3

[0048] ZnO-ZrO with strong adsorption 2 Preparation of photocatalytic composite fibers:

[0049] Take 0.6g of carbon spheres with a particle size of 480nm-520nm and add it to an ammonia solution containing 1.0g of zirconium nitrate and pH=9, take it out after a hydrothermal reaction at 190°C for 12 hours, and place the obtained sample in 6g of zinc nitrate and 3g of water Dipping treatment in the formed solution, drying at room temperature for 24 hours;

[0050] Add 1.5g of spinnable polymer PVP to 10g of ethanol solvent, add 6g of zinc sulfate and 2.5g of glacial acetic acid, stir evenly, then add 0.7g of the obtained particles, stir for 30min, and ultrasonically disperse for 20min.

[0051] Put the obtained solution into the propulsion pump, adjust the electrospinning voltage to 5kv, the propulsion speed to 0.005ml / min, the receiving distance to 5cm, the spinning temperature at 30°C, and the humidity at 30%, and perform electrospinning to obtain the precursor fiber;

[00...

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Abstract

The invention discloses a preparation method of a photocatalytic composite fiber with a high-adsorption effect. The preparation method comprises the following steps of firstly carrying out a hydrothermal reaction on an embedded charged material to enable a carbon sphere to sufficiently adsorb and hold the enough charged material, then coating a photocatalyst precursor through dipping treatment tofurther obtain a required nano particle, an internal charged material of which is coated with a photocatalyst, dispersing the nano particle in a spinning solution, then carrying out electrospinning toobtain a composite fiber completely bound with the nano particle, enabling the carbon sphere in the composite fiber to be basically decomposed through quick air calcination in atmosphere stepwise calcination treatment, enabling a porous structure to appear in the surface of the fiber, moreover, enabling an organic matter to be preliminarily decomposed, preliminarily binding the charged material with a photocatalytic material, enabling a small amount of oxygen vacancies to appear, finally enabling oxygen vacancies to appear in the fiber through calcination in a mixed atmosphere, and firmly binding the charged material with the photocatalytic material, so that the photocatalytic composite fiber with the high-adsorption effect is finally obtained. The preparation method is used for solving the problems that an existing photocatalytic compound is difficultly recovered and has a low specific surface area, a poorer adsorption effect and the like.

Description

technical field [0001] The invention belongs to the technical field of composite fiber preparation, and in particular relates to a preparation method of a photocatalytic composite fiber with strong adsorption. Background technique [0002] Photocatalytic materials such as titanium dioxide, zinc oxide, tin oxide, cadmium sulfide, etc., are widely used in sewage treatment, air purification, antibacterial and antivirus, photo-splitting water to produce hydrogen, new energy development, biomedicine, food science and other fields. Photocatalytic nanofibers have the advantages of non-toxicity, good chemical stability, large specific surface area, strong oxidation ability, high catalytic activity and easy recycling, and are playing an increasingly important role in the field of photocatalysis. However, these photocatalysts also have many problems in the process of use, such as low utilization efficiency of visible light, high recombination rate of electrons and holes, and so on. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/10D01F1/10
CPCD01F1/10D01F9/10
Inventor 汤玉斐刘照伟赵康
Owner XIAN UNIV OF TECH
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