2021 Fiscal Year Research-status Report
TNTZO nanotubes photocatalyst fabricated by one-step anodization method
| Project/Area Number |
18K14085
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
陳 君怡 東京工業大学, 科学技術創成研究院, 特任助教 (90707473)
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| Project Period (FY) |
2018-04-01 – 2023-03-31
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| Keywords | yolk-shell nanocrystals / charge dynamics / metal sulfides |
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| Outline of Annual Research Achievements |
A sequential ion exchange process on the basis of Kirkendall effect was reported to prepare for metal-semiconductor yolk-shell nanocrystals comprising Au yolks associated with various semiconductor shells. The synthetic procedures involved delicate sulfidation on an Au@Cu2O core-shell nanocrystal template, followed by a kinetically controlled cation exchange reaction enabling the conversion of shell composition into various metal sulfides. Au@Cu7S4, Au@CdS, Au@ZnS and Au@Ni3S4, were synthesized. The analytical results of XPS and PL spectroscopy revealed significant electronic interactions and effective charge carrier separation between the yolk and shell components. This feature has vital implications for utilizing these yolk-shell nanocrystals for photocatalysis applications.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Although COVID continues happening in 2021, my colleague in Tokyo Tech and Prof. Hsu in NCTU in Taiwan are still conducting our cooperative research hence I still have 1 publication in 2022, and this publication was selected as ACS editors' choice.
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| Strategy for Future Research Activity |
In a practical scenario, the separated photoexcited electrons and holes can readily react with the surrounding oxygen and water molecules, producing reactive oxygen species for photocatalytic environmental purification. The delocalized, hot electrons at the plasmonic metal yolk may also facilitate specific photoreduction reactions to promote solar fuels generation. Examples have included hydrogen production from water splitting, and hydrocarbons generation from carbon dioxide reduction.
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| Causes of Carryover |
To upgrade a new hydrogen production rate measurement system developed in our lab is the reason for incurring the amount to be used next fiscal year.
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[Journal Article] Electronic Interactions and Charge-Transfer Dynamics for a Series of Yolk-Shell Nanocrystals: Implications for Photocatalysis2022
Author(s)
Jhen-Yang Wu Jhen-Yang Wu Institute of Innovative Research (IIR), Tokyo InJhen-Yang Wu , Ting-Hsuan Lai, Mei-Jing Fang, Jui-Yuan Chen, Ming-Yu Kuo, Yi-Hsuan Chiu, Ping-Yen Hsieh, Chun-Wen Tsao, Huai-En Chang, Yu-Peng Chang, Chien-Yi Wang, Chun-Yi Chen, Masato Sone, Wen-Wei Wu, Tso-Fu Mark Chang, and Yung-Jung Hsu
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Journal Title
ACS Applied Nano Materials
Volume: 5
Pages: 8404-8416
DOI
Peer Reviewed / Open Access / Int'l Joint Research
