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Method for intensifying ultrasonic atomization photocatalysis effect by electromagnetic field

An ultrasonic atomization and photocatalysis technology, applied in the field of photocatalysis, can solve the problems of easy attachment to the light source or the wall surface of the reactor, affecting the photocatalytic efficiency, etc.

Active Publication Date: 2015-07-22
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of ultrasonic atomization photocatalysis, the atomized liquid droplets are easy to attach to the light source or the surface of the reactor wall, and volatilize under the light to form a solid pollution layer. With the delay of the reaction time, the pollution layer gradually thickens, which will lead to More serious light shielding phenomenon, which affects the photocatalytic efficiency

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  • Method for intensifying ultrasonic atomization photocatalysis effect by electromagnetic field

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no. 1 example

[0013] A method for carrying out electromagnetic field enhanced ultrasonic atomization photocatalysis. The specific steps are: the suspension containing nonylphenol (10mg / L) and nano-titanium oxide photocatalyst is placed in the ultrasonic kettle 1, the ultrasonic transducer 2 is placed at the bottom of the ultrasonic kettle, and the liquid of the suspension is kept. The surface is just submerged in the ultrasonic transducer 2, and the atomization reaction tube 4 with the light source 3 fixed in the center is placed horizontally on the top of the ultrasonic kettle 1, and the upper and lower sides are connected. The electric field and the ring-shaped electromagnet 6 are respectively set in the middle front part and the middle rear part of the atomization reaction tube 4 . Before the operation of the ultrasonic atomization photocatalytic reaction, the ultrasonic transducer 2 is first turned on to form atomized droplets containing nano-titanium oxide particles in the ultrasonic k...

no. 2 example

[0015] Acrylonitrile (116.2mg / L) wastewater was subjected to ultrasonic atomization photocatalytic treatment with the device and method described in the first embodiment, the treatment time was 2 hours, and the removal rate of acrylonitrile was 95.7%, compared with ultrasonic atomization without electromagnetic field enhancement process, the degradation rate was 65.2%.

no. 3 example

[0017] Use the device and method described in the first embodiment to carry out ultrasonic atomization photocatalytic treatment of decabromodiphenyl ether (3.25mg / L) wastewater, the treatment time is 1.5 hours, the removal rate of decabromodiphenyl ether is 77.1%, and there is no electromagnetic field The enhanced ultrasonic atomization degradation rate was 23.3%.

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Abstract

The invention relates to the technical field of photocatalysis, particularly to a method for intensifying ultrasonic atomization photocatalysis effect by an electromagnetic field. The method comprises the following steps: in the ultrasonic atomization photocatalysis water treatment process, exerting a high-voltage electrostatic field to enable the atomized liquid drops containing photocatalyst nano-particles to be electrified, and then exerting an alternating magnetic field to enable the electrified atomized liquid drops to be controlled to proceed by surrounding a line source under the action of the electromagnetic force, and to back flow to a photocatalyst turbid liquid system. According to the method, surface contact of the atomized liquid drops and the line source can be avoided, the problem of pollution of catalyst on the outer surface of the source is overcome, meanwhile the diffusion rate of the atomized liquid drops in the air is intensified, the diffusion mode is improved, the utilization efficiency of the photocatalyst is improved, and the catalytic degradation effect on pollutant in water by ultrasonic atomization can be intensified.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a method for enhancing the photocatalysis effect of ultrasonic atomization with an electromagnetic field. Background technique [0002] With the vigorous development of industrial and agricultural production in our country, the problem of organic pollution in the water environment is becoming more and more serious. There are many types and large quantities of organic pollutants in water, which seriously endanger human health, and the pollution problem is quite prominent. Since Fujishma et al. discovered TiO after irradiation in 1972 2 Since the continuous redox reaction of water can occur on the electrode, TiO 2 The representative semiconductor photocatalytic materials have attracted widespread attention. Photocatalysis can generate active hydroxyl radicals ( OH) and superoxide anion radicals ( O 2 - ), play the role of mineralization and degradation of env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/48
Inventor 殷立峰牛军峰谢利利黄大弘代云容
Owner BEIJING NORMAL UNIVERSITY