2020年8月
Visible-light driven photocatalytic hydrogen generation by water-soluble all-inorganic core-shell silicon quantum dots
JOURNAL OF MATERIALS CHEMISTRY A
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- 巻
- 8
- 号
- 31
- 開始ページ
- 15789
- 終了ページ
- 15794
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1039/d0ta01071e
- 出版者・発行元
- ROYAL SOC CHEMISTRY
The photocatalytic hydrogen (H-2) generation by boron (B) and phosphorus (P) codoped silicon quantum dots (Si QDs) with diameters in the quantum confinement regime is investigated. The codoped Si QDs have an amorphous shell made from B, Si and P. The shell induces negative potential on the surface and makes codoped Si QDs dispersible in water. The hydrophilic shell offers enhanced stability and efficiency in photocatalytic H(2)generation and provides the opportunity to study the size dependence of the H(2)generation rate. A drastic increase of H(2)generation rate with decreasing QD size is observed. Analyses based on the Marcus theory reveal that the upper shift of the lowest unoccupied molecular orbital level of Si QDs by the quantum confinement effect is responsible for the enhanced photocatalytic activity.
- リンク情報
- ID情報
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- DOI : 10.1039/d0ta01071e
- ISSN : 2050-7488
- eISSN : 2050-7496
- ORCIDのPut Code : 72951054
- Web of Science ID : WOS:000560225400034