TiO2　with　Nanoring/Nanotube　(R/T)　hierarchical　structure　can　be　prepared　by　tuning　the　oxidation　time　and　oxidation　voltage　in　the　second　step　anodization.　The　resulting　multiabsorption　oscillating　peaks　in　the　visible　light　region　present　a　strong　dependence　on　the　tube　length　which　are　derived　from　the　interference　of　light　reflected　from　the　top　nanorings　and　the　bottom　Ti　substrate,　and　the　optical　path　length　in　TiO2　R/T　hierarchical　structure　can　be　estimated　as　about　2　mu　m.　The　tube　length　of　the　as-prepared　TiO2　photoelectrode　affects　greatly　its　saturation　photocurrent　density,　and　the　different　tube-wall　thickness　can　change　the　photocurrent-saturation　potential.　Under　simulated　AM　1.5　irradiation　(100　mW/cm(2)),　TiO2　R/T　hierarchical　structure　with　tube　diameters　of　20-40　nm　and　tube　length　of　about　1.5　mu　m　shows　higher　photocurrent　density　and　hydrogen　production　rate　at　the　bias　of　0　V　(vs.　Ag/AgCl).　The　results　from　the　IPCE　plots　and　I-t　curves　verify　that　TiO2　R/T　hierarchical　structure　can　exhibit　the　visible　light　activity,　which　is　more　related　to　the　absorption　induced　by　the　defects　rather　than　oscillating　peaks.　Based　on　the　unique　multiple　light　reflection　in　TiO2　R/T　hierarchical　structure,　surface　treatment　will　pave　a　way　for　the　better　utilization　of　oscillating　peaks　in　the　visible　light　region.　(C)　2017　Elsevier　B.V.　All　rights　reserved.