TiO2　nanotube　arrays　were　quickly　synthesized　by　sonoelectrochemical　method　in　the　anodizing　solution　of　0.5　M　H3PO4　and　0.14　M　NaF.　Self-ordered　arrays　of　TiO2　nanotubes　can　be　growth　effective　by　increasing　the　potential　in　a　certain　scale.　Compared　to　10　V　sample,　the　20　V　sample　which　gave　an　average　photocurrent　density　of　5.6　mA/cm2　at　zero　bias　and　the　photo-voltage　of　about　0.9　V/SCE　with　the　light　source　of　a　500　W　high-pressure　mercury　lamp　had　greater　photoelectrochemical　properties.　And　the　10　V　and　20　V　samples　showed　approximate　flat　band　potential,　but　the　latter　exhibited　higher　photocurrent　and　larger　charge　carrier　density.