Effect of hydrogen doping on the loading of titania nanotube films with copper selenide species via alternating current deposition

摘要: Fabrication of TiO2 nanotube (TiNT) films nicely decorated with lower band gap semiconducting nanoparticles remains a challenging issue for photocatalytic and solar cell applications active under visible light irradiation. In this study, TiNT were copper selenide species via alternating current deposition method. For the first time, to achieve uniform loading inside film, as-grown calcined before depositions subjected hydrogen doping in various solutions DC AC pretreatments as well by treating H2 atmosphere. Different resulted different architectures Cu x Se-in-TiNT formed subsequent from acidic Cu(II)-H2SeO3 solution allowing predictable encase Cu2Se3, Cu2Se, CuSe, or Cu2−x Se nm-scaled size. Field-emission scanning electron microscopy EDS X-ray mapping, low-angle diffraction, diffuse reflectance spectroscopy applied characterize morphology, composition, uniformity loading, optical properties fabricated heterostructures. Except absorption, characteristic anatase TiO2, additional absorption edge region is selenide.