Tin　and　molybdenum　co-doped　titanium　dioxide　nanotube　arrays　was　prepared　by　single-step　anodization　of　titanium　plate　(Sn-Mo-TiO2　NTs/Ti　electrode).　The　Sn-Mo-TiO2　NTs/Ti　electrode　was　characterized　by　field　emission　scanning　electron　microscopy　(FESEM),　X-ray　diffraction　(XRD)　and　X-ray　photoelectron　spectroscopy　(XPS).　The　length　and　inner　diameter　of　nanotubes　increased　with　the　increase　of　anodization　voltage.　The　influences　of　factors,　such　as　anodization　voltage,　anodization　time,　concentrations　of　Sn4+　and　Mo6+,　and　calcination　temperature,　on　the　preparation　of　the　electrode　were　studied　by　chronoamperometry　under　simulated　sunlight　irradiation.　The　optical　performance　of　Sn-Mo-TiO2　NTs/Ti　electrode　was　tested　by　UV-vis　spectrophotometer.　Sn-Mo-TiO2　NTs/Ti　electrode　exhibited　high　adsorption　in　the　visible　region　relative　to　pure　titanium　dioxide　nanotube　arrays.　Additionally,　the　chronoamperometry　test　results　highlighted　that　the　doping　of　tin　and　molybdenum　could　enhance　the　photoelectrochemical　performance　of　the　electrode.　The　electrode　exhibited　good　photoelectrocatalytic　oxidation　capacity　on　phenol　at　0.5　V　constant　bias　voltage.　Applied　bias　voltage　enhanced　the　photocatalytic　efficiency　of　nanotube　arrays　via　promoting　the　separation　of　photo-generated　electron-hole　pairs.　A　possible　degradation　process　for　phenol　was　proposed.