Nano-structured　TiO(2),　Ag-TiO(2)　and　Ce-TiO(2),　thin　film-coated　on　glass　spring,　was　prepared　by　sol-gel　method　at　room　temperature.　In　a　batch　reactor　using　TiO(2)　photocatalyst,　toluene,　p-xylene　and　acetone　(TPA)　were　chosen　as　the　typical　VOCs　for　photo-catalytic　degradation.　The　effects　of　doped　Ag/Ce　ions,　initial　TPA　concentration,　gas　temperature,　photo-catalyst　amount　and　hydrogen　peroxide　on　TPA　decomposition　were　investigated.　The　results　indicated　that　H(2)O(2),　could　promote　the　activation　of　catalyst.　The　conversions　of　TPA　in　the　TiO(2)/UV,　Ag-TiO(2)/UV,　CeTiO(2)/UV　processes　were　increased　with　the　irradiation　time　and　the　degradation　character　of　photo-catalyst　was　in　the　order　of　Ce-TiO(2)＞Ag-TiO(2)＞TiO(2).　Photo-catalytic　degradation　efficiency　of　TPA　decreased　with　increasing　initial　concentration,　while　it　increased　with　increasing　the　amounts　of　TiO(2).　The　best　temperature　was　45　degrees　C,　with　highest　photo-degradation　efficiency.　The　reaction　rate　constant　(k)　of　TPA　was　k(Acetone)＞k(Toluene)＞k(p-xylene).　Among　them,　acetone　was　easiest　to　be　destructed.