“…-Synthesis method employed (co-precipitation [8,10,12,15,28,30], sol-gel [14,21,37,38], impregnation [30], grafting [18,29], co-templates [39]). -Titanium and aluminum precursors compounds employed in the co-precipitation (Ti and Al isopropoxides, TiOCl 2 , TiOSO 4 , etc.).…”