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Loaded photo-catalyst and preparation method and use thereof

A photocatalyst, supported technology, applied in the field of environmental and chemical engineering, can solve the problems of unfavorable catalyst recovery and reuse, large loss of active components, low degradation rate, etc., achieve good interaction and synergy effect, and improve photocatalytic activity. , Environmentally friendly effect

Inactive Publication Date: 2009-11-11
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-TiO 2 Photocatalysts have disadvantages such as easy aggregation, difficulty in recovery, and large loss of active components, which are very unfavorable in the recovery and reuse of catalysts.
In addition, due to the low concentration of pollutants to be treated in water, generally at the concentration level of "mg / L", when the photocatalyst degrades, the pollutants and TiO 2 The contact frequency is lower, resulting in slower reaction speed and lower degradation rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 15mL of absolute ethanol to a 100mL beaker, turn on the stirrer, and slowly drop in 6.0mL of Ti(OC 4 h 9 ) 4 , continue to stir the solution until a stable mixed sol is obtained. The specific surface area of ​​10g is 315m 2 / g of activated sludge charcoal particles are immersed in the mixed sol after aging for 24 hours, stirred for 1 hour, left at room temperature for another 12 hours, filtered, then placed in a vacuum dryer at 110°C to remove residual organic matter, and then washed with distilled water The water is transparent, dried, then placed in a muffle furnace for 2.5 hours at 550° C. for calcination under anaerobic conditions, and cooled to room temperature to obtain the supported photocatalyst of the present invention.

[0017] The above-mentioned supported photocatalyst is based on activated sludge carbon particles as a carrier, and the carrier is coated with titanium dioxide, and the mass ratio of the carrier to titanium dioxide is 4: 1 (that is, the ...

Embodiment 2

[0020] Add 15mL of absolute ethanol to a 100mL beaker, turn on the stirrer, and slowly drop in 6.0mL of Ti(OC 4 h 9 ) 4 , continue to stir the solution until a stable mixed sol is obtained. The specific surface area of ​​10g is 428m 2 / g of activated sludge charcoal particles are immersed in the mixed sol after aging for 24 hours, stirred for 1 hour, left at room temperature for another 12 hours, filtered, then placed in a vacuum dryer at 110°C to remove residual organic matter, and then washed with distilled water The water is transparent, dried, then placed in a muffle furnace for 2.5 hours at 550° C. for calcination under anaerobic conditions, and cooled to room temperature to obtain the supported photocatalyst of the present invention.

[0021] The above-mentioned supported photocatalyst is based on activated sludge carbon particles as a carrier, and the carrier is coated with titanium dioxide, and the mass ratio of the carrier to titanium dioxide is 4: 1 (that is, the ...

Embodiment 3

[0024] Add 20 mL of absolute ethanol to a 100 mL beaker, turn on the stirrer, and slowly drop 6.0 mL of Ti(OC 4h 9 ) 4 , continue to stir the solution until a stable mixed sol is obtained. The specific surface area of ​​10g is 526m 2 / g of activated sludge charcoal particles are immersed in the mixed sol after aging for 24 hours, stirred for 1 hour, left at room temperature for another 12 hours, filtered, then placed in a vacuum dryer at 110°C to remove residual organic matter, and then washed with distilled water The water is transparent, dried, then placed in a muffle furnace for calcination at 650°C for 2.5 hours under anaerobic conditions, and cooled to room temperature to obtain the supported photocatalyst of the present invention.

[0025] The above-mentioned supported photocatalyst is based on activated sludge carbon particles as a carrier, and the carrier is coated with titanium dioxide, and the mass ratio of the carrier to titanium dioxide is 4: 1 (that is, the mas...

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Abstract

The invention discloses a loaded photo-catalyst and a preparation method and use thereof. The photo-catalyst adopts the activated sludge carbon grains as the carrier; the carrier is wrapped with titanium dioxide; mass ratio of the carrier and the titanium dioxide is (3-4): 1; the preparation method comprises the steps of dissolving 1 volume of tetrabutyl titanate in 2-4 volumes of anhydrous alcohol; then steeping the activated sludge carbon grains in the mixed sol; uniformly stirring and putting aside and then filtering, drying the activated sludge carbon grains; calcining without oxygen; then cooling to obtain the loaded photo-catalyst. The photo-catalyst in the invention can effectively remove the heavy metal pollutant in sewage, and has the advantages of simple preparation, convenient use, environmental protection, economical and practical performance, good decontaminating effect and the like.

Description

technical field [0001] The invention relates to a new photocatalyst material and its preparation method and application, in particular to a preparation method and application of a photocatalyst for treating heavy metal ion wastewater, belonging to the technical field of environment and chemical engineering. Background technique [0002] Photocatalytic technology is an emerging and developing science and technology, TiO 2 As a green and environment-friendly photocatalyst, it has high photocatalytic activity, stable properties, non-toxic and cheap, high efficiency, and can be operated under normal temperature and pressure. It is used in water purification, air purification, antibacterial disinfection and so on. It has extensive research and application in the fields of sewage treatment and so on. However, nano-TiO 2 Photocatalysts have disadvantages such as easy aggregation, difficulty in recovery, and large loss of active components, which are very unfavorable in the recove...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J21/06B01J37/02C02F1/30C02F1/62C02F1/32C02F101/20C02F101/22
Inventor 夏畅斌张玲吴道新周艺王琼
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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