Morphology-tailored synthesis of tungsten trioxide (hydrate) thin films and their photocatalytic properties
Demir, H. V.
ACS Applied Materials and Interfaces
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/22018
Tungsten trioxide hydrate (3WO 3H 2O) films with different morphologies were directly grown on fluorine doped tin oxide (FTO) substrate via a facile crystal-seed-assisted hydrothermal method. Scanning electron microscopy (SEM) analysis showed that 3WO 3H 2O thin films composed of platelike, wedgelike, and sheetlike nanostructures could be selectively synthesized by adding Na 2SO 4, (NH 4) 2SO 4, and CH 3COONH 4 as capping agents, respectively. X-ray diffraction (XRD) studies indicated that these films were of orthorhombic structure. The as-prepared thin films after dehydration showed obvious photocatalytic activities. The best film grown using CH 3COONH 4 as a capping agent generated anodic photocurrents of 1.16 mA/cm 2 for oxidization of methanol and 0.5 mA/cm 2 for water splitting with the highest photoconversion efficiency of about 0.3% under simulated solar illumination. © 2011 American Chemical Society.
- Research Paper