Gas phase photocatalytic bacteria inactivation using metal modified TiO2 catalysts

► Immobilized metal modified TiO2 was studied for the inactivation of air born bacteria. ► XPS analysis provided important information on the species present on TiO2 surface. ► Metal modified TiO2 improved the inactivation of B. subtilis and S. aureus. ► Inactivation of E. coli was independent of metal modified TiO2 achieving maximum 57%.