| 研究課題/領域番号 |
17F17083
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| 研究機関 | 東京大学 |
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研究代表者 |
大久保 達也 東京大学, 大学院工学系研究科(工学部), 教授 (40203731)
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| 研究分担者 |
XU LE 東京大学, 工学(系)研究科(研究院), 外国人特別研究員
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| 研究期間 (年度) |
2017-04-26 – 2019-03-31
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| キーワード | Layered zeolite / zeolite structure / structure transformation |
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| 研究実績の概要 |
Based on two-dimensional zeolite, three research achievements have been made. The first project is the controlled synthesis of MWW-type layered zeolite with tunable stacking sequence and Al distribution. Three different organic structure-directing agents were applied to control the stacking sequence of MWW layers in different ranges. At the same time, the Al distribution was found to be more order than conventional synthesis. The second is the synthesis of zeolite with different cage size through the ADOR method, by which two new zeolite structures could be prepared for the first time. In this part, the germanosilicate IWV was synthesized for the first time. Then, the zeolite IWV was applied to the ADOR process. The cage in zeolite structure could be controlled from extralarge pore, medium pore to small pore. The third one is the construction of extralarge pore zeolite with UTL topology from 2D zeolite precursor PREFER. The structure transformation rate was found very rapid (with several hours). The interesting mechanistic study has been carried out by using various characterizations, including the IR, PXRD etc. The role of germanium is important for the structure transformation，which was regarded as the driving force of transformation.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
1: 当初の計画以上に進展している
理由
In general, the research proceeds according to the research proposal. At this stage some of the experimental results were very interesting. It is worth doing more deep research to explore the mechanism behind the experiment results, which is regarded as the goal in the following research work.
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| 今後の研究の推進方策 |
Based on the experimental results, three directions could be investigated in the future. First, the controlled synthesis of zeolite materials has been already realized in first year, but the synthesis conditions could be optimized. Second, more characterizations should be performed to confirm the hypothesis of structure formation or transformation. Third, the Al distribution is very important for zeolite research, so theoretical investigation such as calculation should be done to clarify the mechanism.
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