Surface X-ray diffraction study and photocatalytic activity of HF-treated single crystal rutile TiO2(001) surface

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• 作者：Yasuro Ikuma ; Seiya Ogoe ; Masahiro Mitsugi ; Koichi Niwa ; Srinivasan Anandan…
• 关键词：Surface structure ; Titanium oxide (001) single crystal ; Photocatalyst ; Surface X ; ray diffraction ; Decomposition reaction ; Low ; energy electron diffraction
• 刊名：Ionics
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：21
• 期：9
• 页码：2495-2501
• 全文大小：1,984 KB
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• 作者单位：Yasuro Ikuma (1)
  Seiya Ogoe (1)
  Masahiro Mitsugi (1)
  Koichi Niwa (1)
  Srinivasan Anandan (2)
  Eiji Yamauchi (1)
  Hiroo Tajiri (3)
  Osami Sakata (3)
  
  1. Kanagawa Institute of Technology, Shimoogino, Atsugi, Kanagawa, 243-0292, Japan
  2. International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, 500005, India
  3. Japan Synchrotron Radiation Research Institute (JASRI), Sayo, Hyogo, 679-5198, Japan
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Materials Science
  Physical Chemistry
  Condensed Matter
  Renewable Energy Sources
  Electrical Power Generation and Transmission
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1862-0760

文摘

The photocatalytic activity of a hydrogen fluoride (HF)-treated rutile TiO₂(001) surface for the decomposition reaction of linoleic acid was lower than that of an as-received (polished) rutile TiO₂(001) surface. The surfaces of as-received TiO₂(001) and HF-treated TiO₂(001) were investigated using low-energy electron diffraction (LEED) and surface X-ray diffraction (SXRD) to elucidate differences in their photocatalytic activities. The as-received (polished) surface did not yield good LEED patterns, which implied that the surface was not well-ordered and was thus not examined using SXRD. In contrast, the HF-treated surface produced good LEED patterns with a 1?×- structure and was thus studied using SXRD. The analysis of crystal truncation rods indicated that all atoms in the four layers of the surface moved toward the bulk and that the HF-treated surface was (101)-faceted with terraces. On average, the facet was found to be four layers deep. The difference in the condition of the surface influences the photocatalytic activity of the surface. Keywords Surface structure Titanium oxide (001) single crystal Photocatalyst Surface X-ray diffraction Decomposition reaction Low-energy electron diffraction