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Preparation method of compound photocatalytic water purification material

A composite photocatalytic and water purification technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, molecular sieve catalysts, etc., can solve problems such as lack of photocatalytic activity, and achieve the effect of simple process and low raw material cost

Inactive Publication Date: 2010-06-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above materials have excellent organic adsorption performance, ion exchange performance or water mineralization performance, they do not have photocatalytic activity and cannot photocatalytically degrade pollutants while adsorbing organic pollutants.

Method used

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  • Preparation method of compound photocatalytic water purification material
  • Preparation method of compound photocatalytic water purification material
  • Preparation method of compound photocatalytic water purification material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 0.5g of the above-mentioned titanium dioxide powder and place it in 100ml of ethanol solution, add 0.001g of trimethylolethane, 100kHz ultrasonic dispersion treatment for 20 minutes, add 4.5g of commercially available 5A zeolite molecular sieve, and mix well The slurry is mechanically milled on a ball mill for 1 hour, the weight ratio of balls to materials is 5:1, and the milling speed is 120 rpm. Dry the mixed powder obtained after the above ball milling at 110°C for 1 hour, and then bake it in air at 450°C for 5 hours to obtain the product, which is recorded as 10wt% TiO 2 / 5A.

[0031] The product was characterized by X-ray Diffraction, Field Emission Environmental Scanning Electron Microscopy, please refer to figure 1 : a is the X-ray diffraction figure of 5A zeolite molecular sieve, b, c, d, e are the compound that the present invention method that forms on 5A zeolite molecular sieve and supports nano-titanium dioxide 1%, 5%, 10%, 15% respectively X-ray dif...

Embodiment 2

[0034] Weigh 0.75g of nano titanium dioxide powder and place it in 150ml of ethanol solution, add 0.002g of trimethylolethane, 50kHz ultrasonic dispersion treatment for 40 minutes, add 4.25g of 13X zeolite molecular sieve, and mechanically mill the mixed slurry on a ball mill for 1.5 hours, the weight ratio of balls and materials is 8:1, and the milling speed is 140 rpm. Dry the mixed powder obtained after the above ball milling at 110°C for 1.5 hours, and then bake at 400°C in air for 6 hours to obtain the product, which is recorded as 15wt% TiO 2 / 13X.

[0035] The product was characterized by X-ray Diffraction, Field Emission Environmental Scanning Electron Microscopy, please refer to figure 2 : In the figure, a is the X-ray diffraction pattern of 13X zeolite molecular sieve, and b, c, d, e are the composite materials formed by loading nano-titanium dioxide 1%, 5%, 10%, and 15% on 13X zeolite molecular sieve respectively X-ray diffraction pattern.

[0036] The product w...

Embodiment 3

[0038] Weigh 1g of nano-titanium dioxide powder and place it in 200ml of ethanol solution, add 0.002g of trimethylolethane, 20kHz ultrasonic dispersion treatment for 60 minutes, add 4g of medical stone, and mechanically mill the mixed slurry on a ball mill for 1 hour , the weight ratio of the ball and the material is 2:1, and the milling speed is 150 rpm. Dry the mixed powder obtained after the above ball milling at 110°C for 1 hour, and then bake it in the air at 500°C for 3 hours to obtain the product, which is recorded as 20wt% TiO 2 / medical stone.

[0039] The product was characterized by X-ray diffraction and field emission environmental scanning electron microscopy: nano-titanium dioxide has been successfully loaded on the surface of medical stone, and the size of nano-titanium dioxide and medical stone are 30 nanometers and 50 microns, respectively, which are consistent with those before loading.

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Abstract

The invention relates to a preparation method of a compound photocatalytic water purification material, comprising the step of: fixing nanometer titanium dioxide particles of industrial finished products with the best photocatalytic performance on a micron zeolite sieve or surfaces of medical stone particles by a ball milling method to a multifunctional compound material with the photocatalytic performance and the original water purification characteristic of a carrier. The method has the advantages of simple process, lower raw material cost and no pollution to the environment in a production process, and is suitable for industrial production. The prepared compound material has wide application prospect in the field of advanced treatment of drinking water.

Description

technical field [0001] The invention relates to a preparation method of a composite photocatalytic water purification material, in particular to a preparation process of a novel material for drinking water treatment. Background technique [0002] As a semiconductor photocatalyst, nano-titanium dioxide has stable chemical properties, is insoluble in acid-base solutions and water, is non-toxic and harmless to the human body, and can produce highly active hydroxyl radicals under the irradiation of ultraviolet light. Due to its super oxidizing properties, it can degrade and mineralize almost all organic pollutants. However, as a photocatalyst, nano-titanium dioxide has the disadvantages of difficulty in recovery, easy agglomeration and loss of activity, and it is difficult to use it directly. In order to solve this problem, it is an effective solution to load nano-titanium dioxide on a stable carrier. For example, Chinese invention patent ZL 03129239.9 discloses a zeolite-base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/70B01J21/06B01J37/04B01J20/18B01J20/16C02F1/30C02F1/28C02F1/42C02F1/50C02F1/68
Inventor 邓慧萍赵纯黎园潘若平尤晓明刘浩
Owner TONGJI UNIV
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