A　series　of　TiO2　sols　with　different　pH　values　prepared　by　the　sol-gel　method　under　acid　conditions　were　coated　onto　the　surfaces　of　ceramic　tiles　to　obtain　the　corresponding　TiO2　films　respectively.　The　surface　gloss　and　roughness　of　the　as-prepared　TiO2　films　were　measured　by　a　glossmeter　and　an　atomic　force　microscope　(AFM)　respectively.　It　has　been　found　that　the　surface　gloss　of　the　as-prepared　TiO2　films　is　decreased　but　its　roughness　is　increased　with　the　increase　of　the　pH　value　of　TiO2　sol.　Moreover,　the　measurement　result　of　the　as-prepared　TiO2　sols　by　Zetasizer　shows　that　the　ζ　potential　of　TiO　2　sol　is　increased　with　the　increase　of　pH　value　of　TiO2　sol.　It　is　proposed　that　the　increase　of　ζ　potential　will　cause　a　stronger　repulsion　of　particles　in　TiO2　sol,　resulting　in　a　rougher　surface　and　then　lower　surface　gloss　of　the　corresponding　TiO2　film.　©　2009　Institute　of　Materials,　Minerals　and　Mining.