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TiO 2 -CaO and TiO 2 -CaO-Fe 2 O 3  photocatalysts have been synthesized through the surfactant-assisted sol-gel method. The catalysts were characterized using XRD, FTIR,  SEM-ED Sand BET surface area. XRD pattern showed the formation of anatase TiO 2  crystal phase both in TiO 2 -CaO and TiO 2 -CaO-Fe 2 O 3 . The TiO 2 -CaO has higher crystallinity than TiO 2 -CaO-Fe 2 O 3 . Based on the peak refinement using Rietveld, there are two peaks identified as Fe 2 O 3  hematite in the sample TiO 2 -CaO-Fe 2 O 3 .  BET surface area analysis showed  that the average pore size of TiO 2 -CaO and TiO 2 -CaO-Fe 2 O 3  catalysts are 8.04 and 8.41 nm respectively, indicating both catalysts are mesoporous. FTIR spectra show that the vibration of Ti-O, Ca-O, and Ca-TiO 2  were observed in both catalysts. SEM images confirm that both catalysts are porous material. The catechol removal using TiO 2 -CaO and TiO 2 -CaO-Fe 2 O 3  improved with the increase of catalyst concentration. After 360 minutes of UV radiation, the removal of catechol using TiO 2 -CaO-Fe 2 O 3  reached 46.0%, 48.3%, and 69.2%, while when using TiO 2 -CaO, it reached 22.1%, 36.8%, and 57.0% for 0.1 g, 0.15 g, and 0.2 g of catalysts, respectively. The photocatalytic activity of TiO 2 -CaO-Fe 2 O 3  is not so strong compared to TiO 2 -CaO catalyst but the catechol adsorption property of TiO 2 -CaO-Fe 2 O 3  is higher than that of TiO 2 -CaO catalyst.

Synthesis and Characterization of TiO2-CaO and TiO2-CaO-Fe2O3 Photocatalyst for Removal of Catechol