Three ternary doped TiO2 catalysts were made using the modified sol-gel method (see Fig. ), employing EDTA & citric acid as the chelating and complexing agents respectively. A mole ratio of 1:1:1.5 being the ratio of metal ions to EDTA and citric acid was used in the synthesis. EDTA (C10H16N2O8) solution was made using water and ammonia. Stoichiometric quantities of boric acid (H3BO3), cerium nitrate (Ce(NO3)3•6H2O), silver nitrate (AgNO3), and titanium dioxide (TiO2) in aqueous form was added to the solution & stirred. Then, solid citric acid (C6H8O7) was added to the above mixture. Ammonia is used for adjusting the pH to 9, and the resulting mixture was agitated gently till an organometallic gel formed. Drying of the gel was done a laboratory oven at 150 °C for 24 h. The dried sample was finely crushed and subjected to calcination in a muffle furnace at 350 °C for 12 h, followed by calcining at 600 °C for 5 h. The powder thus obtained was stored in an air-tight bottle for further use.