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A kind of photocatalyst ceramsite of loading modified tio2 and preparation method thereof

A photocatalytic and modification technology, applied in the field of photocatalytic materials, can solve the problems of limited solar energy utilization and high price, and achieve the effects of high catalytic degradation ability, uniform particle size, and cheap raw materials

Active Publication Date: 2015-12-09
苏磊 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO2 has great application potential because of its non-toxic, cheap, no photocorrosion, good catalytic activity, and no secondary pollution of catalytic products, but the absorption of light by TiO2 is limited to the ultraviolet region, and reaches The ultraviolet light contained in the sunlight on the ground is less than 5%, which greatly limits its utilization of solar energy.
Activated carbon (AC) has a well-developed pore structure, large specific surface area, non-polar surface chemical properties and strong adsorption characteristics. It is a very good TiO2 carrier material, but its price is relatively high

Method used

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  • A kind of photocatalyst ceramsite of loading modified tio2 and preparation method thereof
  • A kind of photocatalyst ceramsite of loading modified tio2 and preparation method thereof
  • A kind of photocatalyst ceramsite of loading modified tio2 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Take 40 parts of sludge, 40 parts of kaolin, 15 parts of sawdust, and 10 parts of calcium hydroxide, all in parts by weight. The above-mentioned raw materials are fully mixed and stirred to be prepared into mud, and the mud is made into rod-shaped particles with a diameter of 2 mm using a granulator, and dried to form a billet;

[0031] (2) Place the mud billet obtained in step (1) in a high-temperature sintering furnace, heat up at 80°C per hour to 550°C, hold for 2 hours, and then continue to heat up at a heating rate of 100°C per hour until 1000°C , keep the temperature for 3 hours, stop heating, and reduce the furnace temperature to room temperature at a rate of 150°C per hour to obtain porous ceramsite for use.

[0032] (3) According to Ti:N:S=1:4:4 (molar ratio), weigh 3.6596g of butyl titanate, 1.2913g of urea, and 3.2742g of thiourea. Dissolve urea and thiourea in 75 mL of ethanol solution adjusted to pH=2 with hydrochloric acid, denoted as A. The butyl ti...

Embodiment 2

[0035] (1) Take 50 parts of sludge, 30 parts of bentonite, 10 parts of activated carbon, and 15 parts of calcium hydroxide, all in parts by weight. The above-mentioned raw materials are fully mixed and stirred to be prepared into mud, and the mud is made into rod-shaped particles with a diameter of 4 mm using a granulator, and dried to form a billet;

[0036] (2) Place the mud billet prepared in step (1) in a high-temperature sintering furnace, heat it up at 80°C per hour to 600°C, hold it for 2 hours, and then continue to heat up at a heating rate of 100°C per hour until it reaches 1100°C , keep the temperature for 2.5 hours, stop heating, and reduce the furnace temperature to room temperature at a rate of 200° C. per hour to obtain porous ceramsite for use.

[0037](3) Weigh 3.6596g of butyl titanate, 0.9685g of urea, and 2.4557g of thiourea according to Ti:N:S=1:3:3 (molar ratio). Dissolve urea and thiourea in 56 mL of ethanol solution adjusted to pH=2 with hydrochloric ac...

Embodiment 3

[0040] (1) Take 30 parts of sludge, 50 parts of activated clay, 20 parts of sawdust, and 10 parts of calcium hydroxide, all in parts by weight. Fully mix and stir the above raw materials to make slurry, use a granulator to make the slurry into spherical particles with a diameter of 6mm, and dry it to form a billet;

[0041] (2) Put the mud body prepared in step (1) in a high-temperature sintering furnace, heat it up to 550°C at 100°C per hour, keep it warm for 2 hours, and then continue to heat up at a rate of 100°C per hour until it reaches 900°C , kept warm for 3 hours, stopped heating, and lowered the furnace temperature to room temperature at a rate of 150° C. per hour to obtain porous ceramsite for later use.

[0042] (3) Weigh 3.6596g of butyl titanate, 1.6141g of urea, and 4.0928g of thiourea according to Ti:N:S=1:5:5 (molar ratio). Dissolve urea and thiourea in 94 mL of ethanol solution adjusted to pH=2 with hydrochloric acid, and record it as A. Dissolve butyl titan...

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Abstract

The invention discloses a photocatalytic ceramsite loaded with modified TiO2 and a preparation method thereof, belonging to the field of nanometer photocatalytic materials. First, use industrial sludge, clay, wood chips, calcium hydroxide and other raw materials to make porous ceramsite, and then coat a layer of nano-scale modified TiO2 on its surface by impregnation method to make the final photocatalytic ceramic loaded with modified TiO2. grain. The raw materials of the invention are cheap, the process is simple, and the prepared ceramsite material has uniform particle size, adjustable size, large specific surface area, high photocatalytic activity, and high catalytic degradation ability in the ultraviolet-visible light region. The photocatalytic ceramsite material of the invention can be used for photocatalytic treatment of organic waste water, and can also be used for oxidative degradation of gas phase organic matter.

Description

technical field [0001] The invention relates to the field of photocatalytic materials, in particular to a photocatalytic ceramsite loaded with modified TiO2 and a preparation method thereof. Background technique [0002] As a new type of environmental treatment technology developed rapidly in recent years, photocatalytic oxidation technology has been widely used in the field of environmental protection including the removal of volatile organic compounds (VOCs) such as acetone and formaldehyde. TiO2 has great application potential because of its non-toxic, cheap, no photocorrosion, good catalytic activity, and no secondary pollution of catalytic products, but the absorption of light by TiO2 is limited to the ultraviolet region, and reaches The ultraviolet light contained in the sunlight on the ground is less than 5%, which greatly limits its utilization of solar energy. Doping modification of TiO2 to broaden its photoresponse wavelength range and enhance its photocatalytic a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/02
Inventor 苏磊王永强杨坤
Owner 苏磊
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