In situ measurements of the desorption of water from a TiO 2 surface under dry rir by collecting the photoemission yield with an open counter

Daisuke Yamashita, Atsushi Ishizaki, Tomoyuki Yamamoto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We investigated the desorption of water from a TiO 2 surface under a dry atmosphere by collecting the photoemission yield spectra with an open counter. For this purpose, a new attachment for the photoemission yield measurement was prepared. This apparatus is capable of detecting, in the open air, low-energy electrons excited by photons under dried atmospheres; the dew point is below-35°C. A significant change in the photoemission yield spectra due to exposure to a dry atmosphere was observed. To gain a better understanding of these results, observations of the change in the photoemission yield spectra caused by the thermal desorption of adsorbed water were also carried out. The results are consistent with those obtained by exposure to a dry atmosphere. Based on the relationship between the photoemission yield and the thickness of the water layer, the time dependence of the change in the thickness was explained by the second-order reaction rate equation.

Original languageEnglish
Pages (from-to)575-579
Number of pages5
JournalAnalytical Sciences
Volume30
Issue number5
DOIs
Publication statusPublished - 2014

Keywords

  • Adsorbed water
  • Anatase
  • Dry atmosphere
  • Photoemission yield measurements
  • Titanium oxide
  • Work function

ASJC Scopus subject areas

  • Analytical Chemistry

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