Composite photocatalyst for treating phenol-containing wastewater as well as preparation method and application thereof

Abstract

The invention discloses a composite photocatalyst for treating phenol-containing wastewater as well as a preparation method and application thereof, and belongs to the fields of photocatalytic materials and environmental protection. The composite photocatalyst for treating the phenol-containing wastewater is a photocatalyst which takes calcium titanate as a main active substance of photocatalyticdegradation and a molecular sieve as a carrier. The calcium titanate is compounded with the molecular sieve through an equivalent-volume impregnation method, then is subjected to drying and high-temperature calcination to obtain the composite photocatalyst. A high pressure xenon lamp is used for illuminating for 1 hour, the degradation rate of the composite photocatalyst for treating the phenol-containing wastewater to phenol can reach 24.6% to 94.8%, and under the condition of illuminating for more than 1 hour, the degradation rate of pure calcium titanate to phenol is 22.3%. Compared with the single pure calcium titanate, the composite photocatalyst is improved in the aspects of physical characteristics and photocatalytic degradation effects. The preparation method is simple, the raw materials are easy to obtain, the preparing process is easy to operate, the conditions are mild and easy to control, and the product catalytic efficiency is high.

Description

Technical field [0001] The invention relates to a composite photocatalyst for treating phenol-containing wastewater and a preparation method and application thereof, belonging to the field of photocatalytic materials and environmental protection. Background technique [0002] In recent years, with the continuous improvement of my country's industrialization level and the rapid development of urbanization, my country's environmental protection problems have become increasingly severe. Taking water pollution as an example, various chemical companies, such as coal washing plants and coking plants, and traditional companies such as non-ferrous metal smelters, paper mills, textile factories, etc., will contain a large amount of organic pollutants such as phenols in their wastewater. If these pollutants are not effectively treated and are directly discharged into the environment, they will definitely threaten the existence of life. How to achieve effective and clean treatment of such ...

AI Technical Summary

Problems solved by technology

However, because calcium titanate powder particles are fine and easy to agglomerate, the specific surface area is small, it is easy to form a suspension in water and it is difficult to recycle, which limits its wide application in actual production.

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