Efficient Photoelectrochemical Water Splitting by g-C(3)N(4)/TiO(2) Nanotube Array Heterostructures

Well-ordered TiO(2) nanotube arrays (TNTAs) decorated with graphitic carbon nitride (g-C(3)N(4)) were fabricated by anodic oxidization and calcination process. First, TNTAs were prepared via the anodic oxidation of Ti foil in glycerol solution containing fluorinion and 20% deionized water. Subsequently, g-C(3)N(4) film was hydrothermally grown on TNTAs via the hydrogen-bonded cyanuric acid melamine supramolecular complex. The results showed that g-C(3)N(4) was successfully decorated on the TNTAs and the g-C(3)N(4)/TNTAs served as an efficient and stable photoanode for photoelectrochemical water splitting. The facile deposition method enables the fabrication of efficient and low-cost photoanodes for renewable energy applications. [Image: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s40820-018-0192-6) contains supplementary material, which is available to authorized users.