Method for preparing photocatalytic air purification rod-like titanium dioxide particle composite fibrofelt

A technology of photocatalytic particles and composite fiber mats, applied in chemical instruments and methods, botanical equipment and methods, separation methods, etc., can solve problems such as lack, achieve high activity, fast photocatalytic response, and improve antibacterial and bactericidal effects. Effect

Pending Publication Date: 2021-04-02
重庆纤维研究设计院股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photocatalysts such as titanium dioxide, graphene and reduced graphene oxide using photocatalytic mechanism have good air sterilization ability, and are very economical and applicable, but lack of effective load air filter media and t

Method used

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  • Method for preparing photocatalytic air purification rod-like titanium dioxide particle composite fibrofelt
  • Method for preparing photocatalytic air purification rod-like titanium dioxide particle composite fibrofelt

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Experimental program
Comparison scheme
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Embodiment 3

[0024] The basalt fiber of embodiment 3 selects mass percentage component to be SiO 2 : 53.5%, Al 2 o 3 : 15%, Fe 2 o 3 : 4%, FeO: 7%, CaO: 8%, Na 2 O: 5.5%, K 2 O: 2%, MgO: 3.5% and TiO 2 : 1.5% pure natural basalt is used as raw material, melted at high temperature in a kiln at 1475°C to form a uniform lava, and then the basalt lava at 1250°C flows into a 400-hole platinum-rhodium alloy bushing plate made of PtRh10, and finally Basalt fibers are formed by rapid drawing.

Embodiment 1-3

[0026] Embodiment 1-3 is implemented according to the following steps:

[0027] The method for preparing photocatalytic air purification rod-shaped titanium dioxide particle composite fiber felt comprises the following steps:

[0028] Step 1, configure the titanium dioxide precursor solution: dissolve the mixture of titanium isopropoxide and titanium tetrachloride in deionized water, control the precipitation by adding ammonia water, filter the precipitate and dry it, and precipitate into titanium ammonium complex , and then take the precipitated and suction-filtered titanium ammonium complex, add ammonia water and water to configure a titanium dioxide precursor solution with an optimal molar concentration of 2.5mol / L;

[0029] Step 2: Disperse 6mg / mL photocatalytic nanoparticles with deionized water into 50mL, oscillate ultrasonically for 30min to obtain a dispersion, put ultrafine fibers into the dispersion and ultrasonically 5min, then dry at 135°C Keep for 20min, dipping ...

Embodiment 1

[0032] The source of titanium dioxide and titanium in step 2 is titanium isopropoxide and titanium tetrachloride. In step 2, the photocatalytic nanoparticles are graphene oxide nanoparticles, and the diameter of the particles is 55nm. The superfine fiber in step 2 is a superfine glass fiber with an average diameter of 2.5 μm. A binder is added to the titanium dioxide precursor solution in step 3. The microwave rapid reaction heating temperature in step 3 is 175° C., and the reaction time is 7 minutes. The annealing process in step 3 is H 2 Anneal at 280°C for 2.5h. The photocatalytic degradation performance of the finally prepared photocatalytic air purification rod-shaped titanium dioxide particle composite fiber mat can degrade 95% of the 10mg / L rhodamine B solution in 55 minutes under the condition of visible light; the air filtration performance can reach a quantitative 90g / m 2 , filtration resistance 107Pa, filtration efficiency 93.5% and air flow 240L / m 2 min; the m...

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Abstract

The invention discloses a method for preparing photocatalytic air purification rod-like titanium dioxide particle composite fibrofelt. The method comprises the following steps: preparing a titanium dioxide precursor solution; dispersing the photocatalytic nanoparticles with deionized water, carrying out ultrasonic oscillation to obtain a dispersion liquid, impregnating the fibrofelt in the dispersion liquid for ultrasonic treatment, and performing drying; and putting the fibrofelt into a titanium dioxide precursor solution, and then putting the fibrofelt into a microwave rapid reaction synthesizer for annealing to obtain the composite fibrofelt of which the fiber surface is uniformly coated with the rod-like photocatalytic composite nanoparticles. The titanium dioxide particles in a form of precursor mixed liquid are dispersed and attached to the surfaces of fibers, and photocatalytic particles are uniformly loaded and tightly coated with a special three-dimensional network structure of the composite fibrofelt, so that the specific surface area of original single superfine fibers is increased; and the contact area of the catalyst and bacteria and microorganisms and the number of active sites participating in oxidation-reduction reaction are increased, microbial particles in air are captured more efficiently to achieve rapid photocatalytic response, and photocatalytic antibacterial inactivation is achieved.

Description

technical field [0001] The invention belongs to the technical field of air filter fiber felts, and in particular relates to a method for preparing photocatalytic air purification rod-shaped titanium dioxide particle composite fiber felts. Background technique [0002] With the development of society, all walks of life have higher and higher requirements for air quality, especially the current air-borne diseases like the new coronavirus have a deeper and deeper impact on the world, forcing us to propose filter materials for air purification higher requirement. The development trend of high-performance air purification filter materials in the future not only needs to have a very strong ability to capture fine particle pollutants, but also needs to have a composite function of antibacterial and sterilizing, which is very important for applications in densely populated places, such as vehicles, supermarkets , Hospital, etc. Fiber filter felt can use the three-dimensional netwo...

Claims

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Application Information

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IPC IPC(8): B01J21/18A01N59/00A01P3/00A01P1/00B01D39/20B01D46/10B01D46/00A61L9/18
CPCB01J21/18A01N59/00B01J35/004B01D39/2017B01D39/2082B01D39/20B01D46/0028B01D46/10A61L9/18B01D2239/0407B01D2239/0442B01D2239/10
Inventor 杨金明
Owner 重庆纤维研究设计院股份有限公司
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