Synthesis and Photocatalytic Properties of SnSe2/Se Heterojunction Films

SnSe 2 /Se heterojunction films were successfully grown on fluorine-doped tin oxide (FTO) glass for the first time via a one-step solvothermal route using magnetron sputtered Sn metallic precursors, Se powders as selenium source, cyclohexanol as solvent and cyclohexanol as auxiliary solvent, respectively. The SnSe 2 /Se heterojunction films consisted of Se nanoparticles or nanorods cluster and SnSe 2 network surface layers. The crystalline phase and morphology of SnSe 2 /Se films were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), respectively. The photocatalysis measurements of the products for rhodamine Blue (RhB) demonstrated that SnSe 2 /Se heterojunction films revealed better dye degradation properties than SnSe 2 nanosheet films due to the higher separation rates of photogenerated electron–hole pairs of SnSe 2 /Se heterojunction films, which can be confirmed by surface transient photovoltage (TPV) analyzer.