HETEROGENEOUS PHOTOCATALYSIS - A MULTIFACTORIAL PROBLEM

Heterogeneous photocatalysis has large potentials in detoxification of waste water. Due to the heterogeneity of the medium, there arise some mechanistical and technical problems. We have studied the influence o f the amount of catalyst, the concentration of oxy gen and the redox p roperties of different substituted phenols on the degradation rate. Th e optimum amount of the catalyst TiO2 is 2 g/l. Air can be used as the oxygen source without decrease of reaction rates. The reactivity of s elected phenols can be described by two different Hammett-relations.