Fig. 7From: Zirconia-based catalyst for the one-pot synthesis of coumarin through Pechmann reaction a UV/Vis data of ZrO2-TiO2 in solvent-free condition at room temperature. b Kinetics of ZrO2-TiO2 in solvent-free condition. c Kinetics of ZrO2-TiO2 in toluene and ethanol solvent at 60 °CBack to article page