論文

査読有り
2018年5月1日

Role of CoOx cocatalyst on Ta3N5 photocatalysts studied by transient visible to mid-infrared absorption spectroscopy

Journal of Photochemistry and Photobiology A: Chemistry
  • Junie Jhon M. Vequizo
  • ,
  • Mirabbos Hojamberdiev
  • ,
  • Katsuya Teshima
  • ,
  • Akira Yamakata

358
開始ページ
315
終了ページ
319
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.jphotochem.2017.09.005
出版者・発行元
Elsevier B.V.

Tantalum nitride (Ta3N5) photocatalysts attract considerable attention owing to their visible light absorption below 600 nm and suitable band structures for reduction and oxidation of water to generate hydrogen and oxygen gas. Herein, we investigated the effects of CoOx on the dynamics of photogenerated charge carriers in Ta3N5 powder photocatalysts by using microsecond to millisecond transient visible to mid-IR absorption spectroscopy. Transient absorption measurements revealed that most of the electrons in Ta3N5 are deeply trapped at the defects, most likely originating from oxygen vacancies and reduced Ta species. Two important roles of CoOx were elucidated: effective capture of holes to prolong electron lifetime and reduction of defects as recombination centers, which further elongates the lifetime of both electrons and holes.

リンク情報
DOI
https://doi.org/10.1016/j.jphotochem.2017.09.005
ID情報
  • DOI : 10.1016/j.jphotochem.2017.09.005
  • ISSN : 1010-6030
  • SCOPUS ID : 85029539181

エクスポート
BibTeX RIS