Photocatalytic degradation of metoprolol tartrate in suspensions of two TiO2-based photocatalysts with different surface area. Identification of intermediates and proposal of degradation pathways

► Kinetics and efficiency of photocatalytic degradation of the β1-blocker metoprolol tartrate (MET). ► Two TiO2 specimens employed. ► Faster degradation of MET, but slower mineralization, obtained with the TiO2 specimen having lower surface area. ► Photocatalytic transformation pathways of MET including mineralization.