| 研究課題/領域番号 |
16K18024
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| 研究機関 | 東京大学 |
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研究代表者 |
黄 ジュンホ 東京大学, 大学院工学系研究科(工学部), 特任研究員 (60772978)
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| 研究期間 (年度) |
2016-04-01 – 2018-03-31
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| キーワード | Ion-selective transport / Nanofluidics / Mesoporous silica / Energy harvesting / Salinity gradient / Osmotic energy / Reverse electrodialysis |
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| 研究実績の概要 |
A mesoporous silica (MPS)-based nanofluidic energy harvester was fabricated and ion-selective transport in mesopores as a function of the salt gradient was studied. Aqueous solutions with three different kinds of monovalent electrolytes, KCl, NaCl and LiCl with different diffusion coefficients were considered as working fluids. The dependency of power density on the type of cation employed indicates the harvested energy increases as the cation mobility increases, particularly at high salt concentrations. This cation-specific dependency suggests the maximum power denstiy increases by increasing the diffusion coefficient ratio of cations to anions, making this ratio a critical parameter in enhancing the performance of nanofluidic energy harvester with small pores ranging from 2 to 3 nm.
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| 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
So far, the research is proceeding as planned as a research representative has already a wealth of experience in various experiments relating a fabrication of various nanoporous materials, thin film, photolithography (MEMS) and characterization techniques of produced porous materials such as a scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray reflection. These abundant experimental background experiences is a great help in conducting the project.
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| 今後の研究の推進方策 |
I am going to investigate a temperature sensitivity on the energy harvesting characteristic of a osmotic energy conversion systems. An ionic conductance in a silica nanopore increases with increasing temperature because ion mobility and surface charge density of nanopore increase. Therefore, the energy harvesting performance of the device will be studied at various salt concentration gradients and temperature conditions. In order to conduct the research on the temperature sensitivity, a temperature-controllable experiment apparatus should be designed and prepared soon.
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| 次年度使用額が生じた理由 |
課題期間が2年でまだ1年の課題期間が残っています。特にその他部分での次年度使用額がたくさん生じた一つの原因としては前年度に研究に必要な備品をあらかじめ購入をしておいたからです。
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| 次年度使用額の使用計画 |
国内と国際学会に参加予定（旅費）
実験に必要な物品費とその他購入に使う予定
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