| 研究課題/領域番号 |
19J23268
|
|---|
| 研究機関 | 京都大学 |
|---|
研究代表者 |
李 展召 京都大学, 大学院理学研究科化学専攻, 特別研究員(DC1)
|
|---|
| 研究期間 (年度) |
2019-04-25 – 2022-03-31
|
| キーワード | nanocrystals / cation exchange / heterostructure / shape memory |
|---|
| 研究実績の概要 |
In this year, I continued my research program on design and synthesize transition metal single atom catalysts loaded on an appropriate substrate for photocatalytic carbon dioxide reduction. So far we have synthesized various MnS/Cu1.8S nanocrystals (NC) heterostructures in special morphologies and sophisticated compositions. We succeeded in synthesizing different core@shell-like Cu1.8S/MnS heterostructures by partial Mn cations exchange with Cu1.8S nanoplates. These complex NC heterostructures can be used for advanced optoelectronic and catalytic applications, including photocatalytic CO2 reduction.
|
| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
We found a shape memory behavior phenomenon during cation exchange reaction.We applied the partial Mn2+ cation exchange (CE) with roxbyite Cu1.8S nanoplates. At the initial stage of the CE, core@shell-like Cu1.8S/MnS heterostructures were obtained. The Cu1.8S-core/MnS-shell NC heterostructures were transformed into the half-hexagonal plate morphology by the progressive decomposition of Cu1.8S part.Those half-hexagonal Cu1.8S/MnS heterostructures was finally rebuilt to full-hexagonal MnS nanoplates by the growth of MnS phase.Such a special “scrap” and “rebuild” process during CE process was also seen for other shaped Cu1.8S NCs like nanorod and nanosphere.
|
| 今後の研究の推進方策 |
In a next year, I will summarize the research work of shape memory behavior phenomenon during cation exchange reaction and continue promoting my research program and utilize these nanoheterostructures (Cu1.8S-core/MnS-shell NC, Cu1.8S/MnS-rebuild NC) as photo-responsible units in hybrid photocatalytic system, such as hydrogen evolution or CO2 reduction reaction.
|
