Highly ordered TiO2 nanotube arrays electrodes were successfully fabricated by two-step anodization method on Ti sheet substrates in an electrolyte composed of ammonium fluoride,deionized water and glycol.The tube wall was smooth and the average internal and external diameter,wall thickness and tube length achieved were 80nm,90nm,10nm and 9μm,respectively.XRD and FE-SEM results revealed that: the TiO2 nanotube arrays presented amorphous structure.When calcined at 300 ℃,the arrays would crystallize into anatase phase,and the crystallization degree of oxide layer would increase as the temperature rose.Calcinating at 400℃ would not obviously disrupt the porous structure of the highly ordered arrays.However,higher temperature would enlarge the diameter of the nanotube array and roughen the tube wall.When the temperature reached 600℃,the nanotube mouth got broken because of the excessive stress,thus led to the oxide layers thinness and nanotube mouth clogging.It showed by the photoelectric test that the electrode presented obvious photoresponse under 300-400nm UV excitation(maximized at 360nm).The degree of crystallization and the micro-structure of the oxide layer can significantly affect the photoelectric properties of the electrode.After the calcination process at 400℃,the TiO2 nanotube arrays,with highly ordered tubular structure of direct connection to Ti substrate,can ensure the rapid transportation of photo-induced electron to Ti substrate,while the high crystallinity of the arrays can help to reduce the defect density of the nanotube and extend the lifetime of photo-induced carriers.At this time,the electrode showed the best photoelectric property and the photocurrent intensity maximized(29.6μA).However,the calcination process with over-temperature would give rise to the substantial loss of the TiO2 oxide layer,mouth clogging and severe decline in the photoelectric properties.The prepared electrode possesses excellent photoelectric UV response,which was found wide application in UV detector.