BET (Brunauer-Emmett-Teller) surface area analysis was conducted for the 1B-0.1Ce-0.06Ag-TiO₂ photocatalyst used in this study, and the specific surface area was determined to be 23.3 m²/g. This value aligns with those commonly reported for titanium dioxide (TiO₂)-based photocatalysts in the literature, confirming the validity and consistency of the synthesis process employed in this work. The surface area of a photocatalyst is a critical parameter, as it directly influences the material's ability to adsorb pollutants and facilitate photocatalytic reactions.