Ehsan Rahmani - Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran
Dariush Jafari - Department of Chemical Engineering, Bushehr Branch, Islamic Azad University Bushehr, Iran
Iman Yarnezhad Sahlabadi - Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad,Mashhad, Iran
Seyed Ali Jafari - Department of Biotechnology, Persian Gulf Research Institute, Persian Gulf University,۷۵۱۶۹,Bushehr, Iran

The aim of the current study is to model the photocatalytic activity of TiO2thin films doped by SiO2 additives with the variations in SiO2 concentrationand MO degradation time. The nano crystalline TiO2:xSiO2 (x: molepercentage) films were prepared by sol-gel method and settled on glasssurface. The final films were achieved after a calcination procedure andUV irradiation in contact with Methyl Orange (MO) solution. Nonlinearbehavior of photocatalytic activity of synthesized films made the authorseager to use Fuzzy Logic (FL) model to simulate and calculate the MOconcentration variation with SiO2 concentration and MO degradation time.The statistical reported values which denote the agreement between thepredicted and experimental data sets were about 96% for all cases. Theresults of modeling approved the excellent agreement between thepredicted values by the model and the experimental observations.Therefore it can be concluded that FL is an appropriate tool to simulatesuch processes.

Photocatalytic activity; Sol-Gel; Modeling and simulation; Fuzzy inference system