A preparation method of adsorption visible light catalytic material for air pollution control

Abstract

The invention relates to a preparation method of an adsorbing visible light catalytic material used for air pollution management. Particularly, coal gangues, asphalt powder and tourmalines are used as raw materials to prepare an active carbon-zeolite compound with perpetual negative charges, and the active carbon-zeolite compound is used as a carrier of a WO3 / TiO2 catalyst to be synthesized into the adsorbing visible light catalytic material. In the composite material, the tourmalines naturally carry the perpetual negative charges, and PM2.5 with positive charges in the air can be continuously and efficiently adsorbed; the active carbon-zeolite compound generated by the coal gangues has the super-large specific surface area, and also has the hydrophily of zeolite and the lyophobic property of active carbon, so that the active carbon-zeolite compound has good specific adsorption property on polar pollutants in the air and lyophobic VOCs substances and the like; and the adsorbed pollutants can be degraded and removed by the WO3 / TiO2 catalyst under the illumination of sunlight. The product can be used for the technical field of an outer wall coating and keeps self-clean after being washed by rainwater, so that the continuous efficient purification on the pullulated air is realized.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to a preparation method of an adsorption-visible light catalysis composite functional material used for air control. Background technique [0002] With the rapid development of my country's economy, the acceleration of urbanization and the expansion of industrial scale, regional air pollution is becoming more and more serious. In recent years, smog weather characterized by fine particulate matter has appeared successively in many regions of my country, posing a huge threat to visibility, public health and urban landscape. [0003] Among the existing air pollution control technologies, photocatalytic materials have become one of the effective ways to solve urban air pollution because of their remarkable air purification efficiency. The principle of photocatalytic technology is to use photocatalytic materials to convert solar energy into chemical energy, oxi...

AI Technical Summary

Problems solved by technology

[0005] Although nano-TiO 2 The application in environmental purification coatings has achieved remarkable and fruitful results, but there are still some problems that are not conducive to practical promotion

(1) Nano-TiO 2 There are certain dependence and limitations on the environment in use, and its utilization rate of ultraviolet light source is extremely high, while the utilization of common visible light sources (such as: sunlight) is insufficient, and the efficiency is very low, but in sunlight, ultraviolet light source The proportion of less than 6%, which greatly limits the nano-TiO 2 The scope of use of environmental purification coatings

(2) In the gas phase reaction system, the pre-adsorption of pollutants on the catalyst surface is very important to improve the photocatalytic oxidation rate, while the existing TiO 2 Composite photocatalytic materials often only focus on the self-cleaning function, and their adsorption performance on pollutants such as VOCs and PM2.5 is poor, which directly affects their actual air purification effect