2022年1月12日
Crystal Facet Engineering and Hydrogen Spillover-Assisted Synthesis of Defective Pt/TiO2–x Nanorods with Enhanced Visible Light-Driven Photocatalytic Activity
ACS Applied Materials & Interfaces
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- 巻
- 14
- 号
- 1
- 開始ページ
- 2291
- 終了ページ
- 2300
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/acsami.1c20148
- 出版者・発行元
- American Chemical Society (ACS)
Hydrogen spillover can assist the introduction of defects such as Ti3+ and concomitant oxygen vacancies (VO) in a TiO2 crystal, thereby inducing a new level below the conduction band to improve the conductivity of photogenerated electrons and the visible light absorption property of TiO2. Meanwhile, crystal facet engineering offers a promising approach to achieve improved activity by influencing the recombination step of the photogenerated electrons and holes. In this study, with the aim of achieving enhanced visible light-driven photocatalytic activity, rutile TiO2 nanorods with different aspect ratios were synthesized by crystal facet engineering, and Pt-deposited TiO2-x nanorods (Pt/TNR) were then obtained via reduction treatment assisted by hydrogen spillover. The reduction treatment at 200 °C induced the formation of surface Ti3+ exclusively, whereas surface Ti3+ and VO were formed by performing the reduction at 600 °C. The Pt/TNR with a higher aspect ratio reduced at 200 °C exhibited the highest activity in photocatalytic H2 production under visible light irradiation owing to the synergistic effect of the introduction of Ti3+ defects and the spatial charge carrier separation induced by crystal facet engineering.
- リンク情報
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- DOI
- https://doi.org/10.1021/acsami.1c20148
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/34967219
- URL
- https://pubs.acs.org/doi/pdf/10.1021/acsami.1c20148
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85122653180&origin=inward
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85122653180&origin=inward
- ID情報
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- DOI : 10.1021/acsami.1c20148
- ISSN : 1944-8244
- eISSN : 1944-8252
- PubMed ID : 34967219
- SCOPUS ID : 85122653180