Modified TiO2 loaded photocatalytic ceramsite and preparation method thereof

A photocatalytic and modified technology, applied in the field of photocatalytic materials, can solve the problems of high price and limited solar energy utilization, and achieve the effects of low cost, good photocatalytic ability and improved photocatalytic activity

Active Publication Date: 2014-01-29
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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  • Modified TiO2 loaded photocatalytic ceramsite and preparation method thereof
  • Modified TiO2 loaded photocatalytic ceramsite and preparation method thereof
  • Modified TiO2 loaded photocatalytic ceramsite 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 by weight. Fully mix and stir the above raw materials to make slurry, use a granulator to make the slurry into rod-shaped particles with a diameter of 2mm, and dry it to form a billet;

[0031] (2) Put the mud body prepared in step (1) in a high-temperature sintering furnace, heat it up from 80°C per hour to 550°C, keep it warm for 2 hours, and then continue to heat up at a rate of 100°C per hour until it reaches 1000°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.

[0032] (3) Weigh 3.6596g of butyl titanate, 1.2913g of urea and 3.2742g of thiourea according to Ti:N:S=1:4:4 (molar ratio). Dissolve urea and thiourea in 75 mL of ethanol solution adjusted to pH=2 with hydrochloric acid, and record it as A. Dissolve butyl titanate in 60mL eth...

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 by weight. Fully mix and stir the above raw materials to make slurry, use a granulator to make the slurry into rod-shaped particles with a diameter of 4mm, and dry it to form a billet;

[0036] (2) Put the mud body prepared in step (1) in a high-temperature sintering furnace, raise the temperature from 80°C per hour to 600°C, keep it warm for 2 hours, and then continue to heat up at a rate of 100°C per hour until it reaches 1100°C , kept warm for 2.5 hours, stopped heating, and lowered the furnace temperature to room temperature at a rate of 200°C per hour to obtain porous ceramsite for later 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 acid, and record it as A. Dissolve but...

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 modified TiO2 loaded photocatalytic ceramsite and a preparation method thereof and belongs to the field of nano photocatalytic materials. The preparation method comprises the following steps: firstly, preparing porous ceramsite by using raw materials including industrial sludge, clay, sawdust and calcium hydroxide; and secondly, covering one layer of nano-grade modified TiO2 on the surface of the porous ceramsite through an immersion method to finally prepare the modified TiO2 loaded photocatalytic ceramsite. According to the modified TiO2 loaded photocatalytic ceramsite and the preparation method thereof, the raw materials are cheap and the process is simple; the prepared ceramsite material is uniform in grain diameter, adjustable in size, large in specific surface area and high in photocatalytic activity, and has a very high catalytic degradation capability in an ultraviolet-visible light region. The photocatalytic ceramsite material can be used for photocatalytic treatment of organic wastewater and can also be used for oxidative degradation of gas-phase organic matters.

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 ...

Claims

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Application Information

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