PHOTOCATALYTIC PURIFICATION OF MEDIA

摘要

The invention relates to the treatment of a medium, particularly to the purification of water, air, or surfaces. A photo-active layer (120) is disposed on an energy-transfer surface (111) of a substrate (110). Thus light energy transfer from said substrate (110) to the photoactive layer (120) is directly achieved without an intermediate passage through the medium. The substrate (110) may preferably be a waveguide from which light energy is transferred into the photoactive layer (120) via evanescent waves. Moreover, the optical coupling between the substrate (110) and the photoactive layer (120) may spatially vary.

主权项

1. An apparatus for the treatment of a medium, particularly for the purification of fluid media or of surfaces, comprising:
a waveguide as a substrate with a substrate surface through which energy is transferred during operation of the apparatus; photocatalytic layer that is disposed on the substrate surface and that can be contacted by the medium; and an intermediate layer disposed between the waveguide and the photocatalytic layer, wherein total internal reflection takes place at an interface between the intermediate layer and the waveguide during operation.