Synthesis of Highly Active Si-doped TiO2 Nanotube/SnS Hybrids for Photocatalytic Degradation of Toxic Dyes

Abstract Heterostructures with nanoscale sizes have great superiorities in photocatalytic environment decontaminant because of their efficient interface charge transfer and great surface area. This work reports the facile fabrication of nano-tubular TiO 2 and Si-doped TiO 2 (NTs) hybridizing SnS nanocrystallites and their high-efficient photocatalytic activity. The fabricated nanostructures show wide light absorption in the UV-visible region. The S BET , light absorption, hydrophilicity, and photo-induced super hydrophilicity were enhanced by Si-doping and SnS modification. Moreover, high-efficient interface charge transfer was produced after the SnS modification and further enhanced by the Si doping because of band structure modulation. Thus, the Si-doped TiO 2 nanotubes/SnS heterostructures showed a remarkably enhanced photocatalytic and Fenton-like photocatalytic activities in dye wastewater treatment than the TiO 2 NTs. This work suggests potential materials and their facile fabrication process for the photocatalytic application of environmental decontamination.