A　visible-light-driven　InVO4/TiO2　mesoporous　photocatalyst　was　prepared　by　a　sol-gel　method.　The　catalyst　was　characterized　by　powder　X-ray　diffraction　(XRD),　nitrogen　adsorption-desorption,　transmission　electron　microscopy　(TEM),　UV-vis　diffuse　reflectance　spectroscopy,　X-ray　photoelectron　spectra　(XPS),　ultraviolet　photoelectron　spectra　(UPS),　and　spin-trapping　electron　paramagnetic　resonance　(EPR).　Photocatalytic　activity　of　the　sample　was　evaluated　by　the　degradation　of　volatile　organic　compounds　(VOCs)　in　air　under　visible　light　irradiation　(450　nm　≤　λ　≤　900　nm).　Results　revealed　that　the　addition　of　InVO4　leaded　to　the　visible　light　response　up　to　∼540　nm　for　InVO4/TiO2.　Moreover,　upon　visible　light　irradiation,　some　superoxide　radical　anions,　such　as　O2{radical　dot}-　and　OH{radical　dot}　radicals,　were　generated　on　InVO4/TiO2,　leading　to　the　decomposition　of　VOCs.　The　high　photocatalytic　activity　towards　VOCs　(e.g.　benzene)　was　still　maintained　in　the　cycle　experiments,　and　the　turnover　numbers　recorded　within　12　h　work　out　to　be　11.8　mol　(produced　CO2)　and　6.2　mol　(degraded　C6H6)　per　mol　catalyst.　Deactivation　of　the　photocatalyst　was　not　observed　during　the　cycle　experiments.　It　has　been　confirmed　that　InVO4/TiO2　photocatalyst　could　be　activated　by　visible　light　due　to　the　existence　of　the　InVO4.　Based　on　the　energy-band　levels　of　InVO4　and　TiO2,　a　photosensitization　mechanism　of　InVO4/TiO2　is　proposed.　©　2007　Elsevier　B.V.　All　rights　reserved.