TiO2/SiO2　were　prepared　by　surface　reaction　of　silica　with　an　acetone　solution　of　Ti(i-OC3H7)nCl4-n,　where　n　=　0-2.　Results　of　XRD,　Raman　and　UV-Vis　DRS　showed　that　two　types　of　Ti　species,　small　particles　of　anatase-type　TiO2　and　noncrystalline　TiOx　species,　are　molecularly　dispersed　on　the　silica　surface.　Relative　to　the　TiO2　bulk,　a　blue-shift　in　the　bandgap　adsorption　edge　of　TiO2/SiO2　was　observed　due　to　the　quantum　size　effects.　The　bandgap　energy　(Eg)　of　TiO2/SiO2　is　3.96　eV.　When　M(Pd,　Cu,　Ni)　is　deposited　on　TiO2/SiO2,　the　adsorption　spectra　extend　to　visible　light　region　and　the　bandgap　adsorption　edge　red　shifts　with　respect　to　TiO2/SiO2.　Compared　with　that　of　Pd,　the　deposition　of　Cu　and　Ni　on　TiO2/SiO2　has　more　effects　on　LMCT　transition　(O2-　-＞　Ti4+)　of　Ti　atoms.　And　the　bandgap　energy　of　Cu-TiO2/SiO2　decreases　to　3.69　eV.　Similarly,　the　photon　adsorption　property　for　visible　light　can　be　improved　relatively　by　the　incorporation　of　MoO3　on　TiO2/SiO2.　At　higher　MoO3　loadings,　the　Mo-O-Ti　coupled　structure　can　be　formed　through　the　interaction　between　MoO3　and　TiO2,　which　made　the　bandgap　energy　decrease　to　3.81　eV.