Propionic acid decomposition by the multi-decorated TiO2-based photocatalysts under visible light irradiation

Unpleasant odors are the most disturbing pollutants and the main reason for air quality complaints in urban and industrial areas. Odor emissions consist of various chemical components, some of which can be perceived at very low threshold levels. Volatile organic compounds (VOCs) have been designated as the major odorant group. In particular, volatile fatty acids (VFAs) represent an important source of unpleasant odors that have been considered in many studies. Among them, propionic acid (PA) has attracted much attention as one of the leading compounds responsible for the odors-polluted environment. In this work, the effect of multi-decorated enhanced photocatalysts, for the PA decomposition, under visible light irradiation, was properly investigated.