Preparation method of visible light catalytic material for complete and rapid degradation of indoor formaldehyde and benzene
A technology of rapid degradation and catalytic materials, applied in chemical instruments and methods, separation methods, catalysts for physical/chemical processes, etc., can solve the problems of low catalytic performance and high recombination rate of photogenerated electrons and holes
Active Publication Date: 2022-02-01
INNER MONGOLIA UNIVERSITY
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Problems solved by technology
However, due to the high recombination rate of photogenerated electrons and holes, the catalytic performance of this material is low, which has become the biggest bottleneck for its degradation of indoor formaldehyde and benzene.
Method used
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Embodiment
[0018] Embodiment: 15 milligrams of the three-phase catalyst of synthesis are uniformly dispersed on the glass surface by ethanol, and after drying, put it in a reactor with a volume of 2 liters, equipped with an air circulation device, and the light source is a 300W xenon lamp with a visible light filter (wavelength greater than 420 nm). Formaldehyde and benzene in the reactor are brought into the reaction device by air bubbling, the concentration is controlled by adjusting the airflow, and the changes of substances in the reaction gas are detected by gas infrared detector and gas chromatography. Degradation see Figure 5 .
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The invention belongs to the practical technology in the field of environmental engineering and provides a photocatalytic material (Ag 2 Ta 4 o 11 / Ag / Ag 8 (Ta 0.5 Nb 0.5 ) 26 o 69 ) can completely and quickly degrade indoor formaldehyde and benzene under visible light to achieve the purpose of purifying the air. The present invention uses ethanol, tantalum pentoxide, niobium pentoxide, silver nitrate, and polyvinylpyrrolidone to prepare a three-phase light that can efficiently oxidize indoor formaldehyde and benzene under visible light through a simple ethanol reflux method, solid heat method, and in-situ reduction. catalyst. Just spread a small amount of catalyst on the solid surface, formaldehyde and benzene can be oxidized to carbon dioxide and water under visible light irradiation, without secondary pollution, and the catalyst can be reused with high stability and excellent selectivity. The prepared catalyst is non-toxic and harmless, easy to recycle, and has low cost of raw materials. It meets the requirements of environmental purification and is expected to be used in indoor air purification such as air purifiers, interior wall coatings and other fields.
Description
technical field [0001] The invention relates to a synthesis method of a three-phase catalyst and its application in purifying indoor formaldehyde and benzene under visible light, relates to the technical field of indoor pollution treatment in engineering, and relates to the field of material synthesis and photocatalysis technically. Background technique [0002] Indoor formaldehyde and benzene mainly come from wooden furniture, wooden floors, and various boards, adhesives, paints, etc., and gradually volatilize and discharge into relatively closed rooms over time. For a long time, due to long-term indoor activities, human It can cause serious impacts on the health of human beings, causing respiratory diseases such as human immunity, allergies, asthma, and even the occurrence of cancer. Various methods have been proposed to purify the indoor environment, including adsorption, biodegradation, thermal degradation, and photocatalytic degradation technologies, among which photoca...
Claims
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IPC IPC(8): B01J23/68B01J35/02B01D53/72B01D53/86B01J35/00
CPCB01D53/8668B01J23/682B01J35/00B01J35/30
Inventor 王晓晶武宇航宋美婷苏毅国柴占丽赵彦宏
Owner INNER MONGOLIA UNIVERSITY