OICC Press Journal of Nanostructure in Chemistry 2193-8865 5 4 (December 2015) 2015 07 28 Photodegradation of dye acridine yellow on the surface of mesoporous TiO2, SiO2/TiO2 and SiO2 films: spectroscopic and theoretical studies 10.1007/s40097-015-0165-y EN N. P. Smirnova Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kiev, 03164, UA N. I. Surovtseva Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kiev, 03164, UA T. V. Fesenko Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kiev, 03164, UA E. M. Demianenko Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kiev, 03164, UA A. G. Grebenyuk Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kiev, 03164, UA A. M. Eremenko Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kiev, 03164, UA Journal Article 2015 07 28 Abstract Electronic spectra and LDI mass spectra changes accompanying photodegradation of acridine yellow (AY) adsorbed on the surface of prepared via templated sol–gel synthesis TiO 2 , SiO 2 , and TiO 2 /SiO 2 mesoporous films have been investigated and the main photodegradation products have been determined. The results of calculations show the adsorption energy of the molecular state of AY to be the greatest for the complex with titania–silica where Lewis acidic sites are present, the smallest one being related to the complex with titania what corresponds to the experimental data. Effectiveness of acridine yellow photodegradation on the surfaces of mesoporous films under UV irradiation increases in a row SiO 2