| 研究課題/領域番号 |
19F19043
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 補助金 |
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| 応募区分 | 外国 |
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| 審査区分 |
小区分36020:エネルギー関連化学
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| 研究機関 | 京都大学 |
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研究代表者 |
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| 研究分担者 |
POURNAGHSHBAND I ALI 京都大学, 高等研究院, 外国人特別研究員
POURNAGHSHBAND ISFAHANI ALI 京都大学, 高等研究院, 外国人特別研究員
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| 研究期間 (年度) |
2019-04-25 – 2021-03-31
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| 研究課題ステータス |
完了 (2020年度)
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| 配分額 *注記 |
2,300千円 (直接経費: 2,300千円)
2020年度: 1,100千円 (直接経費: 1,100千円)
2019年度: 1,200千円 (直接経費: 1,200千円)
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| キーワード | Gas separation membrane / MXene / Graphene oxide / H2/CO2 separation / 2D materials / Molecular sieving |
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| 研究開始時の研究の概要 |
1- Synthesis of conductive conjugated polymer: The cyclopolymerization of 1,6-heptadiene derivatives via olefin metathesis reaction is proposed to synthesize the microporous polyacetylene structure.
2- Synthesis and development of MXene 2D nanosheets: Development of MXene structures with excellent electrical conductivity and mechanical flexibility.
3- Preparation and development of membranes (Polymer/MXene mixed matrix membrane, MXene inorganic membranes)
4- Making the setup and testing
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| 研究実績の概要 |
Ti3C2Tx MXene sheets with high hydrophilicity are being considered for gas separation applications. Herein, we prepared MXene/graphene oxide (GO) composite membranes at different GO concentrations with smaller interlayer spacing and aligned platelets for a better separation performance. The membranes were fabricated by vacuum filtration of MXene/GO suspension at different GO compositions on AAO substrate. The membranes thickness was adjusted between 20 nm to 100 nm with an exact volume of the suspension.
FTIR, XPS spectra revealed the interactions between MXene platelets and GO monolayer through Ti-O-C covalent bonds. Moreover, XPS and UV absorbance indicated the reduction of GO sheets by MXene. X-ray scattering exhibited that the d-spacing of MXene increases from 11.4 A to 13.5 A; at low GO contents, which explained the interlamellar insertion of GO into MXene has occurred. The stability and mechanical properties of the MXene/GO membranes improved compared to the pure MXene due to the Ti-O-C covalent bonding. N2 adsorption measurement showed a decrease in pore volume and gas uptake of MXene membranes by the addition of GO, which was attributed to the Ti-O-C covalent bonds and improvement in the alignment degree. The gas permeance of the composite membranes decreased down to half of its pure MXene value by adding GO because of the smaller pore volume. However, the H2/CO2 selectivity significantly improved from 115 for pure MXene to 536 for MX50GO50, indicating a better sieving ability in the composite membranes.
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| 現在までの達成度 (段落) |
令和2年度が最終年度であるため、記入しない。
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| 今後の研究の推進方策 |
令和2年度が最終年度であるため、記入しない。
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