Hollow　titania　microspheres　(HTS)　were　fabricated　via　a　sol-gel　process　by　coating　the　hydrolysis　product　of　titanium　tetrabutoxide　(TBOT)　onto　the　amino　(-NH2)　modified　porous　polystyrene　cross-linked　divinyl　benzene　(PS-DVB)　microspheres　under　changing　atmospheric　pressure,　followed　by　calcination　in　nitrogen　and　air　atmosphere.　Particularly,　the　atmospheric　pressure　was　continuously　and　regularly　changed　during　the　formation　process　of　PS-DVB@TiO2　microspheres.　Then　the　TiO2　particles　were　absorbed　into　the　pores　and　onto　the　surface　of　PS-DVB　as　well.　The　resultant　HTS　(around　2　pm　in　diameter)　featured　a　high　specific　surface　area　(84.37　m(2)/g),　anatase　crystal　and　stable　hollow　microsphere　structure,　which　led　to　high　photocatalysis　activity.　The　photocatalytic　degradation　of　malachite　green　(MG)　organic　dye　solution　was　conducted　under　ultraviolet　(UV)　light　irradiation,　which　showed　a　high　photocatalytic　ability　(81%　of　MG　was　degraded　after　UV　irradiation　for　88　min).　Therefore,　it　could　be　potentially　applied　for　the　treatment　of　wastewater　contaminated　by　organic　pollutants.　(C)　2015　Elsevier　B.V.　All　rights　reserved.