Use of ordered mesoporous titania with semi-crystalline framework as photocatalyst

► Titania with a high hexagonal mesopore ordering and a large surface area. ► Rates of methyl orange decomposition follow Langmuir-Hinshelwood kinetics. ► The dependence of the reaction rate on incident light intensity is first order. ► No change in the activity of the catalyst is observed at the first 4 cycles. ► The mesoporous TiO2 is able to use repeatedly.