Elucidation of novel states of adsorbed molecules in nanospaces at high temperature and high pressure

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04977
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 32010:Fundamental physical chemistry-related
• Research Institution: Shinshu University
• Principal Investigator: Iiyama Taku 信州大学, 学術研究院理学系, 教授 (30313828)
• Co-Investigator(Kenkyū-buntansha): 二村 竜祐 信州大学, 学術研究院理学系, 助教 (90647223)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 物理吸着 / ナノ空間 / 有害物質除去 / 二酸化炭素 / カーボンニュートラル / 2次元物質 / エネルギー貯蔵 / X線回折

Outline of Final Research Achievements

Elucidation of the mechanisms of physical adsorption phenomena is important for applications such as removal of toxic substances and storage of energy molecules using porous materials. In particular, the elucidation of these mechanism under high temperature and high pressure has not progressed well due to experimental difficulties. In this study, we developed an in situ X-ray measurement cell with an extended applicable temperature and pressure range and applied a microscopic analysis method for molecules in a small space. This measurement system provided new findings, such as the formation of quasi-two-dimensional crystal structures in the pores of carbon dioxide.

Free Research Field

物理化学

Academic Significance and Societal Importance of the Research Achievements

吸着現象はエネルギーを消費することなく分子を濃縮することができ、有害物質の除去やエネルギー分子の貯蔵への利用が期待されている。吸着現象が顕著に生じる多孔体中のナノ空間は、分子数個分の空間であり、分子レベルでの構造解析を行う必要がある。本研究は、吸着現象をより広い温度・圧力範囲に適用するためのセルを開発し、二酸化炭素の細孔内擬２次元結晶構造の形成等の成果を挙げることができた。