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Piezoelectric optoelectronic material for degradation of organic pollutants and degradation method thereof

A technology of organic pollutants and optoelectronics, applied in the field of pollutant treatment, can solve the problem that the ability to degrade pollutants cannot meet the requirements, and achieve the effects of stable performance, strong adsorption capacity and efficient removal

Inactive Publication Date: 2018-09-04
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, although some piezoelectric optoelectronic materials have been used to degrade pollutants, their ability to degrade pollutants still cannot meet the requirements

Method used

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  • Piezoelectric optoelectronic material for degradation of organic pollutants and degradation method thereof
  • Piezoelectric optoelectronic material for degradation of organic pollutants and degradation method thereof
  • Piezoelectric optoelectronic material for degradation of organic pollutants and degradation method thereof

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preparation example Construction

[0041] Two-dimensional KNbO 3 Concrete preparation examples of nanosheets:

[0042] (1) Weigh 1.403g KOH and 0.35g Nb 2 o 5 , successively added to a 100mL beaker containing 25mL of ethylene glycol;

[0043] (2) Place the beaker containing the above mixed solution on a magnetic stirrer (stirring speed: 500rpm) and stir for 45 minutes to fully disperse;

[0044] (3) Put the above mixed solution into a polytetrafluoroethylene lining, and heat at 200° C. for 12 hours.

[0045] (4) After cooling to room temperature, wash with distilled water and ethanol for more than three times, and dry to obtain a white product.

[0046] (5) Grind the above white product with an agate mortar for 5 minutes, place the obtained powder in a muffle furnace, and then calcinate it at 900°C for 2 hours to obtain a two-dimensional KNbO with a thickness of 50nm and a length of 300nm 3 Nanosheets.

[0047] see figure 1 , figure 2 , KNbO prepared by the present invention 3 Nanosheets, under SEM ob...

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Abstract

The invention discloses a piezoelectric optoelectronic material for the degradation of organic pollutants. The piezoelectric optoelectronic material utilizes two-dimensional KNbO3 nanosheets. A preparation method of the two-dimensional KNbO3 nanosheet comprises orderly adding KOH and Nb2O5 into a container with ethylene glycol according to the ratio, carrying out full dispersion, transferring themixed solution into a high pressure reactor, carrying out heating for some time, carrying out cooling to the room temperature, carrying out cleaning and drying to obtain a white product, grinding thewhite product into powder, and carrying out calcination at a high temperature to obtain the two-dimensional KNbO3 nanosheet. The invention also provides an organic pollutant degradation method. The method utilizes the piezoelectric optoelectronic material as a catalyst, and ultrasonic wave or combination of illumination and ultrasonic waves to assist in the degradation of organic pollutants. The piezoelectric optoelectronic material fully utilizes the two-dimensional KNbO3 nanosheet advantages of a large ratio of the active exposed surface, a strong adsorption capacity, easy deformation and high piezoelectric constant, can be used as a photocatalyst to be excited by ultraviolet light, can excite more electron hole pairs under ultrasonic conditions through the piezoelectric effects and realizes the efficient removal of organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of pollutant treatment, and in particular relates to a piezoelectric photoelectronic material used for degradation of organic pollutants and a method for degradation of organic matter. Background technique [0002] With the growth of the world economy, the problem of environmental pollution is becoming more and more serious. Studies have found that some natural organic pollutants produced by the metabolic activities of organisms and other biochemical processes are carcinogenic, and can also react with other pollutants to generate secondary pollutants. More organic pollutants are produced due to the rise of the modern chemical industry. They enter the environment during production and use and when they reach a certain concentration, they will cause pollution, disturb or destroy the ecological balance, and endanger human health. Organic matter is not easy to photodegrade, oxidize, or be degraded by microorgan...

Claims

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Application Information

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IPC IPC(8): B01J23/20B01J35/02C02F1/30C02F1/36C02F1/72C02F101/30
CPCC02F1/30C02F1/36C02F1/725B01J23/20C02F2305/10C02F2101/30B01J35/00B01J35/30B01J35/39
Inventor 张作泰余东方李顺
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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