Ultraviolet Light-Induced Surface Changes of Tungsten Oxide in Air: Combined Scanning Transmission Electron Microscopy and X-ray Photoelectron Spectroscopy Analysis
Scanning transmission electron microscopy (STEM) and X-ray photoelectron spectroscopy analyses were combined to clarify the ultraviolet light-induced surface changes of WO<sub>3</sub> in air. Identical-location STEM (IL-STEM) analysis showed that the WO<sub>3</sub> particle surface was covered with an amorphous thin film after ultraviolet irradiation in air. X-ray photoelectron spectroscopy analysis showed that hydrocarbon decomposition and the formation of carboxyl/hydroxyl species occurred. These results suggested that the amorphous thin films consisted of photocatalytic oxidative species of hydrocarbon. The IL-STEM analysis could detect small light-induced changes. This technique will be useful for the microscopic characterization of photocatalysis or photoinduced hydrophilic conversion.
Authors
- Tamaki Shibayama (ORCID: https://orcid.org/0000-0003-3915-8924)
- Yuki Nakagawa (ORCID: https://orcid.org/0000-0001-5020-1458)
- Masaki Takeguchi (ORCID: https://orcid.org/0000-0002-0282-6020)
- Yasuhiro Shiratsuchi
Institutions
- Hokkaido University (JP)
- National Institute for Materials Science (JP)
Publication Details
- Journal
- Nanomaterials
- Published
- 2024-09-13
- DOI
- https://doi.org/10.3390/nano14181486
- Citations
- 2
- Primary Topic
- Electronic and Structural Properties of Oxides
- Type
- article
- Field-Weighted Citation Impact
- 0.23
Funders
- Ministry of Education, Culture, Sports, Science and Technology
- Hokkaido University
- National Institute for Materials Science