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STEM and XPS analyses were combined to clarify the ultraviolet light-induced surface changes of WO3 in air. IL-STEM analysis showed that the WO3 particle surface was covered with an amorphous thin film after ultraviolet irradiation in air. XPS analysis showed that hydrocarbon decomposition and formation of carboxyl/hydroxyl species occurred. These results suggested that the amorphous thin films would consist of photocatalytic oxidative species of hydrocarbon. IL-STEM analysis could detect small light-induced changes. This technique will be useful for microscopic characterization of photocatalysis or photoinduced hydrophilic conversion.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: tungsten oxide, photocatalysis, dentical-location scanning transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet light, hydrocarbon decomposition

Date published: 2024-09-13

Publisher: Multidisciplinary Digital Publishing Institute (MDPI)

Journal:

• Nanomaterials (ISSN: 20794991) vol. 14 issue. 18 1486

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.3390/nano14181486

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Updated at: 2024-09-20 08:30:15 +0900

Published on MDR: 2024-09-20 08:30:16 +0900