Highly ordered anodic TiO2 nanotube arrays and their stabilities as photo(electro)catalysts

► Highly ordered TiO2 nanotube arrays are anodically fabricated within a large domain. ► The arrays photoelectrocatalytically degrade MO pollutants with a high efficiency. ► The arrays have highly stabilities on morphology and structure. ► The arrays can be reused many time as good photo(electro)catalysts.