A photocatalyst

Abstract

The present invention relates generally to a relatively stable magnetic photocatalyst comprising an insulated magnetite core coated with a layer of photoactive titanium dioxide. In one example, the insulation layer is silicon dioxide which blocks direct electrical contact between the titanium dioxide and the magnetite.

Description

field of invention [0001] The present invention relates generally to photocatalysts and in particular, but not exclusively, to photocatalysts suitable for use in slurry-type photoreactors for degrading organic compounds or chemicals, such as those present in wastewater of, but not limited to, organic compounds or chemicals. Background of the invention [0002] As pollutants, organic chemicals that can be found in wastewater of industrial or domestic origin must be removed or destroyed before being discharged into the environment. Such contaminants can also be found in groundwater and surface water that require treatment to achieve acceptable drinking water standards. Much of the natural purification of lagoons, ponds, streams, rivers and lakes is due to sunlight, which breaks down organic molecules into simpler molecules and eventually into carbon dioxide and other inorganic products. There are various sensitizers that speed up this natural purification process. Among tho...

AI Technical Summary

Problems solved by technology

The obvious disadvantage of this method is that not only greatly reduces the available surface area of ​​the catalyst, but also slows down the photocatalytic reaction due to the limitation of mass transfer.

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