Supported TiO2 photocatalyst, its preparation method and photocatalytic water purifier

A photocatalyst and load-type technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, light water/sewage treatment, etc., can solve the problems of low photocatalytic efficiency, achieve easy-to-obtain raw materials, loose preparation process conditions, High adsorption effect

Inactive Publication Date: 2006-07-12
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another object of the present invention is to overcome the defects of low photocatalytic efficiency of existing fixed-film photocatalytic water purifiers, thereby providing a kind of high-efficiency adsorption that can realize low-concentration pollutants in the water to be treated, eliminate mass transfer restrictions, and improve Photocatalytic efficiency, can become a photocatalytic water quality purifier for deep purification of slightly polluted water sources

Method used

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  • Supported TiO2 photocatalyst, its preparation method and photocatalytic water purifier
  • Supported TiO2 photocatalyst, its preparation method and photocatalytic water purifier
  • Supported TiO2 photocatalyst, its preparation method and photocatalytic water purifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, use the powder coating method of viscose to prepare supported TiO 2 Photocatalyst TiO 2 / ACFs-A

[0027] Commercially available P25TiO 2 Powder (particle size less than 50nm, crystal form is anatase phase) mixed with deionized water, combined with mechanical stirring and ultrasonic dispersion to prepare TiO 2 TiO with a solid content of 4wt% 2 Suspension, then add water-soluble organosilicon modified acrylic emulsion (silicon acrylic suspension) (in milky white, solid content is 40wt%, polymerization degree is 3000) as viscose agent, its addition is TiO 2 0.5wt% of the amount, and then ultrasonically dispersed to form highly dispersed TiO with a certain viscosity 2 suspension.

[0028] Activated carbon fibers impregnated with prepared TiO after surface cleaning 2 In the suspension, after being pulled out, the excess suspension in the fiber filaments is shaken off. After the suspension is dried by cold air, it is then immersed in TiO 2 Suspension, th...

Embodiment 2

[0030] Embodiment 2, use liquid phase deposition method to prepare supported TiO 2 Photocatalyst TiO 2 / ACFs-B

[0031] Use deionized water to prepare ammonium fluorotitanate solution with a concentration of 0.07 mol / L and a boric acid solution with a concentration of 0.5 mol / L, and then mix them to form a mixed solution with a molar ratio of ammonium fluorotitanate and boric acid of 1:3. Hydrochloric acid adjusted the pH of the mixture to 3.0.

[0032] Insert the cleaned activated carbon fiber into the above mixed solution, keep the temperature of the mixed solution at 50°C, and after liquid phase deposition for 20 hours, take out the activated carbon fiber and dry it, then bake it at 600°C for 1 hour under the protection of nitrogen, and get Obtain the loaded TiO of the present invention 2 Photocatalyst TiO 2 / ACFs-B. The supported TiO 2 Photocatalyst TiO 2 / ACFs-B is based on activated carbon fiber matrix, loaded with TiO 2 The loading amount is 324mg TiO 2 / g acti...

Embodiment 3

[0033] Embodiment 3, use sol-gel method to prepare loaded TiO 2 Photocatalyst TiO 2 / ACFs-C

[0034] Prepare a precursor solution with tetra-n-butyl titanate as a precursor, wherein the volume ratio of each component is: tetra-n-butyl titanate: absolute ethanol: distilled water: glacial acetic acid = 1:8:2:10, and the order of addition is : First, mix tetra-n-butyl titanate and absolute ethanol in a given volume ratio, stir evenly to form solution A; mix distilled water and glacial acetic acid in a given volume ratio to form solution B, and then mix solution A with 2ml / The speed of min is added dropwise into the stirring solution B to prepare a precursor solution.

[0035] Immerse the cleaned activated carbon fiber in the above precursor solution, and let it stand in a ventilated place for 2 days to gel to obtain a transparent sol with a certain viscosity, pull the immersed activated carbon fiber, dry the glue, and then immerse in the above sol Pull it out again, after 3 t...

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Abstract

The invention relates to a carrier-type TIO2 photo-catalyst, it's preparing method, and a high-absorbability photo-catalysis water purifier made from said material. Said carrier-type TIO2 photo-catalyst uses active carbon fiber base as substrate, which carries 100-600mgTIO2 / g active carbon fiber to form the TIO2 film in 100-300nm thick and the specific surface area in 150-400m2 / g. Said catalyst can be attained by powder plating method, liquid deposition method and sol-gel method of adhesive agent. The invention can keep the former space between active carbon fibers with the advantages that the liquid can freely enter the inner part of photo-catalyst and the ultraviolet light can radiate the inner part of photo-catalyst. The photo-catalysis water purifier with aforementioned carrier-type TIO2 photo-catalyst is in the shape of rectangle, while several photo-catalyst elements with said catalyst are inserted into the slot of purifier, the aeration system on the bottom can mix the treating liquid with air to reduce the mass transfer limit. Said purifier can effectively absorb the action bottom material; and improve the photo-catalysis process to apply the deeply-purification treatment of micro-pollution water.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a loaded TiO 2 A photocatalyst, a preparation method thereof, and a high-adsorption photocatalytic water purifier prepared by using the photocatalyst. Background technique [0002] Photocatalytic oxidation technology can non-selectively degrade various organic pollutants in mineralized water and reduce heavy metal ions. It is considered to be an efficient and clean new purification technology in the field of water purification. The design and application of photocatalytic water purifiers are closely related to the type of photocatalyst used. At present, there are three main types of photocatalytic water purifiers: ① fluidized bed suspension photocatalytic water purifier; ② fixed film photocatalytic water purifier; ③ water purifier combined with photocatalysis and adsorption filtration. Among them, the fine photocatalyst particles in the first fluidized bed suspension type photoca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C02F1/30
Inventor 傅平丰栾勇戴学刚
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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