| AVS 64th International Symposium & Exhibition | |
| Surface Science Division | Tuesday Sessions |
| Session SS-TuP |
| Session: | Surface Science Poster Session |
| Presenter: | Anthony Babore, University of California Irvine |
| Authors: | A.D. Babore, University of California Irvine J.M. Langford, University of California Irvine J.C. Hemminger, University of California Irvine |
| Correspondent: | Click to Email |
Mixed sulfide/oxide films were prepared on W (100) as a model system for sulfur-doped tungsten trioxide which has shown potential for enhanced visible light absorption for photocatalysis. In this study we sought to gain a fundamental understanding of the effects of incorporating sulfur atoms into a tungsten oxide system. This was accomplished using a combination of temperature programmed desorption (TPD), Auger electron spectroscopy (AES) and high-resolution electron energy loss spectroscopy (HREELS). D2O was used as a probe molecule in the TPD experiments and yielded pronounced effects on the desorption spectra for pure oxide, sulfide and mixed sulfide/oxide films on W (100). In addition coverage dependent desorption energies were calculated and compared. AES spectra displayed the relative amounts of sulfur and oxygen on the surface and HREELS experiments confirmed the presence and thermal stability of tungsten sulfide on the surface.