Abstract
The effect of humidity on the photocatalytic performance of four semiconductors was investigated in the degradation of gaseous mixture contains five light C1-C3 hydrocarbons. The photocatalytic study was performed with/without 40000 ppm of water vapour at 40 degrees C in order to simulate the real operating conditions of the hot climate areas with high humidity level. In dry environment, TiO2(P25) and ZnO exhibited the highest photocatalytic activity. However, in the presence of water vapour, the investigated photocatalysts were deactivated with different extend. ZnO and CeO2 were the most negatively influenced materials by humidity, while, TiO2(UV100) was the most resistant photocatalyst against the deactivation. (C) 2017 Elsevier B.V. All rights reserved.