A method for determining the photoactivity of in the visible light photoactive photocatalysts and measuring apparatus for this purpose,

摘要

The present invention relates to a standardized measuring method for determining the photoactivity of photocatalytically acting in the visible light materials (vlps - materials), in particular of vlps - titanium dioxide, as well as a measuring apparatus for this purpose.The vlp - material is in the solution of a test substance, for example, 4 - chlorophenol, suspended, with a blue emitting light emitting diodes (led) exposed and the degradation of the test substance is measured over time. The measuring cell is set up such that, a constant temperature for the leds - exposure source and the sample is ensured. For example, the leds with a maximum of 50% of the allowable current operated.The measurement method can be carried out rapidly and reproducibly. The measuring apparatus is inexpensive and easy to transport.