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Preparation method of activated carbon fiber photocatalysis net loaded with nano titanium dioxide

A nano-TiO2, activated carbon fiber technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of nano-TiO2 particle loading strength, loading uniformity and stability, etc. The effect of high surface area, high degradation efficiency, and high photocatalytic activity

Inactive Publication Date: 2009-11-18
SHANGHAI HUAMING HI TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned loading method also has nano-TiO 2 The problem of insufficient loading strength, loading uniformity and stability of particles

Method used

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  • Preparation method of activated carbon fiber photocatalysis net loaded with nano titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The viscose-based activated carbon fiber felt (BET specific surface area is 1356m 2 ·g -1 , the pore volume is 0.292 cm 3 ·g -1 , with a size of 80×75×3 mm) immersed in an ammonia solution with a mass concentration of 28%, ultrasonically cleaned for 40 minutes, and then washed with deionized water three times; Washed with ionized water three times, then soaked activated carbon fiber felt in acetone for 20 min, washed with deionized water three times, and dried at 105 °C.

[0040] Dissolve 2.5g epoxy resin with an epoxy value of 0.25 in 100mL acetone to prepare an epoxy resin acetone solution, and then put 5.000g nanometer titanium dioxide powder (Degussa P25) with an average particle size of 50 nanometers into the solution. In the above solution, shear and disperse for 1 hour at a rotational speed of 7000 rpm to form a uniformly dispersed milky white slurry. The pretreated activated carbon fiber mat is immersed in the milky white slurry, taken out after 25 minutes, a...

Embodiment 2

[0044] The same activated carbon fiber-supported nano-TiO was prepared in the same manner as in Example 1 2 Photocatalytic mesh. put it in figure 1 In the apparatus shown, a small tubular reactor is used to hold it. Put 10 μL of toluene solution with a mass concentration of 99.5%, and volatilize naturally. When completely volatilized and the adsorption reached equilibrium, turn on the UV lamp. After 3h, the degradation rate of benzene gas was measured to reach 35%. The toluene gas in the airtight chamber was emptied and then put into 10 μL of 99.5% toluene solution to volatilize in the airtight chamber. After the adsorption was balanced, the UV lamp was turned on. After 3 hours, the toluene gas degradation rate reached 33%. The photocatalytic degradation experiment of toluene was repeated again, and the degradation rate of toluene reached 30%.

Embodiment 3

[0046] The same viscose-based activated carbon fiber felt used in Example 1 was immersed in an ammonia solution with a mass concentration of 20%, ultrasonically cleaned for 20 min, and then washed three times with deionized water; then with a mass concentration of 40% nitric acid solution, ultrasonication After treatment for 20 min, washed three times with deionized water; then immersed activated carbon fiber felt in acetone for 10 min, washed with deionized water three times, and dried at 105 °C. The pretreated activated carbon fiber mat was dipped in the milky white slurry prepared according to Example 1, and the rest of the steps were the same as those of Example 1. Among them, the epoxy value of the epoxy resin was 0.45.

[0047] The prepared photocatalytic material has a specific surface area of ​​610m 2 ·g -1 , pore volume 0.216cm 3 ·g -1 , the average pore size is 3.41nm, and the unit mass of activated carbon fiber TiO 2 The load factor is 53%. The wind is 5m s -...

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Abstract

The invention provides a preparation method of an activated carbon fiber photocatalysis net loaded with a nano titanium dioxide, including the following steps: (1) immerging an activated carbon fiber cloth or a activated carbon fiber felt into ammonia water solution, cleaning by ultrasonic , washing by water, then immerging the washed product into nitric acid solution, processing by ultrasonict, washing again by water, and then immerging the product in acetone and then taking out and washing by water, and drying; (2) immerging the product of step one into epoxide resin acetone solution containing nano TiO2 powder, then drying in the vacuum, roasting for 2-4 hours at a temperature of 370-570 DEG C under nitrogen atmosphere, and cooling, thus obtaining the activated carbon fiber photocatalysis net loaded with nano titanium. The invention has degradation efficiency of formaldehyde as high as 80-90%, good load intensity, high unit mass activated carbon fiber TiO2 load factor and high specific surface area, can fast degrade volatile organic contaminant and can be used repeatedly.

Description

technical field [0001] The invention relates to a preparation method of a photocatalytic material, in particular to a preparation method of an activated carbon fiber-supported nano-titania photocatalytic net for degrading pollutants such as formaldehyde and toluene. Background technique [0002] The closedness of indoor spaces and the pollution caused by decorative materials make more than half of the world's population affected by indoor air pollution, and about 36% of mild respiratory infections and 22% of chronic obstructive pulmonary diseases globally are directly related to it. Therefore, air purification technology has become a research hotspot that people pay more and more attention to. Most of the previous air purification technologies use porous adsorbents (such as activated carbon, molecular sieves, etc.) to adsorb toxic pollutants in the air. In this way, the pollutants are only transferred and enriched, and they are not degraded themselves, and there are still se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/10B01J37/34B01J37/02B01J37/08A62D3/10A61L9/18A62D101/28A61L101/02
Inventor 宣绍峰何小强吴秋芳马新胜余蓉蓉
Owner SHANGHAI HUAMING HI TECH GRP
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