Fibrous　SrTiO3　particles　were　prepared　by　a　hydrothermal　reaction　method　using　strontium　hydroxide　octahydrate　and　protonic　layered　tetratitanate　as　raw　materials.　The　samples　were　characterized　by　X-ray　diffraction,　X-ray　photoelectron　spectrometer,　scanning　electron　microscopy,　nitrogen　adsorption-desorption　isotherm　measurements　and　diffusion　reflectance　spectra.　SrTiO3　existed　as　two　different　morphologies　of　particles,　i.e.,　fibrous　particles　and　nanosized　particles　which　attached　to　the　surface　of　former　ones.　SrTiO3　seemed　to　be　formed　by　two　different　ways.　One　way　is　a　direct　reaction　between　H2Ti4O9　and　Sr(OH)(2)　and　the　other　is　a　two-step　reaction　involving　transformation　of　H2Ti4O9　to　monoclinic　TiO2　followed　by　a　reaction　with　Sr(OH)(2).　Fibrous　nitrogen　doped　SrTiO3,　which　exhibited　excellent　visible　light　responsive　photocatalytic　activity,　was　prepared　by　the　heat　treatment　of　fibrous　SrTiO3　under　the　flow　of　ammonia　gas　at　600　degrees　C　for　3　h.　Under　the　irradiation　of　light　with　wavelengths　larger　than　400　and　290　nm;　the　photocatalytic　activities　of　fibrous　SrTiO3　were　2.4　and　1.3　times　greater　than　those　of　spherical　SrTiO3　prepared　by　the　solid-state　reaction.　(c)　2006　Elsevier　B.V.　All　rights　reserved.