Method for preparing platinum/semiconductor oxide catalyst having photo-thermal synergistic effect

Abstract

The invention relates to a method for preparing a catalyst capable of degrading gaseous phase volatile organic pollutant. The method for preparing a platinum / semiconductor oxide catalyst having a photo-thermal synergistic effect comprises the steps of: 1) adding the semiconductor oxide into a solvent, 2) performing the ultrasonic processing for 1 to 2 hours, 3) adding chloroplatinic acid aqueous solution into the suspension of the semiconductor oxide, stirring at dark place and then stirring under light, 4) coating on the surface of an UV lamp, 5) drying and 6) utilizing the luminous energy and thermal energy emitted by the UV lamp to steam for 2 to 5 h under the mixture steam of water and alcohol, in order to catalytically reduce the chloroplatinic acid into nanometer platinum grain through the luminous energy, opening a gaseous phase catalytic reactor, going on illuminating for 1 to 3 h and volatilizing the residual alcohol and water. The method for preparing the product has simple technique, is easily industrialized, and is capable of efficiently photo-thermal concerted catalyzing to degrade the gaseous phase volatile organic pollutant, with high catalytic stability.

Description

technical field [0001] The invention relates to a preparation method of a catalyst capable of degrading gas-phase volatile organic pollutants. Background technique [0002] At present, volatile organic compound gases (such as: formaldehyde, benzene, toluene, xylene, etc.) are the main components of indoor air pollutants and industrial air pollution (such as chemical, pharmaceutical, printing and dyeing, leather, etc.), which are harmful to human health. It is an important aspect that affects public environmental health and safety, and it is also the source of many occupational diseases. Therefore, the development of an efficient and stable catalyst for degrading gas-phase volatile organic pollutants has always been a difficult point in environmental governance. [0003] In the past few decades, a large number of treatment schemes have been studied, from the past adsorption method, biological method to the recent photocatalytic technology. Studies have proved that it is a ve...

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Problems solved by technology

There are also researches that have invented a plasma-driven photocatalytic system (B.Y.Lee, S.H.Park, S.C.Lee, M.Kang, S.J.Choung, Catal.Today, 2004, 93-95) as a light source instead of a traditional ultraviolet light source. , 769.), this method can effectively improve the catalytic degradation activity of benzene, and at the same time inhibit the TiO 2 The formation of intermediate products on the surface, but this kind of equipment is relatively expensive, and it is difficult to achieve large-scale industrialization

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