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Pictures taken at different steps during the synthesis of AOL. (A) Fresh olive leaves cut and washed. (B) Acid hydrolysis under N2 atmosphere. (C) Addition of TiCl3 under N2 atmosphere. (D) Filtering and washing. (E) Drying at 120 °C. (F) Suspension of leaves in isopropanol and titanium isopropoxide. (G) Reflux at 80 °C, 6 h. (H) Calcination at 550 °C. (I) Resulting AOL.
