This document summarizes a study on the degradation of the pharmaceutical propranolol by photocatalysis using titanium dioxide. The researchers tested different pH levels and TiO2 concentrations and found that a pH between 4-6.3 and a TiO2 concentration of 0.7 g/L provided the best degradation of propranolol. They also found that reducing the solution volume from 400ml to 200ml improved degradation yields. The goal was to evaluate TiO2's ability to degrade propranolol via photocatalysis and determine optimal conditions for higher reaction rates.