The mesoporous x%Ti-SiO2 supports were prepared by the aerosol-assisted sol-gel process , with different Ti loadings (x = 0, 4, 8, 12 and 16%). N2 physisorption isotherms and BJH pore size distributions are displayed in Fig. (a) and (b), and their textural properties are summarized in Table . All isotherms correspond to Type IV isotherms, consistent with mesoporous solids. Pore size distributions of all aerosol silica are centered in the same range ca. 12-15 nm. This pore size is larger than the expected size of F127 micelles (ca. 5-6 nm) due to the swelling effect from the incorporation of TPA + cations during the synthesis .