• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Flux Crystal Growth and Functionalization of Five-Coordinate Layered Titanate K2Ti2O5

Research Project

Project/Area Number 20K05074
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 26020:Inorganic materials and properties-related
Research InstitutionShinshu University

Principal Investigator

Hayashi Fumitaka  信州大学, 学術研究院工学系, 准教授 (20739536)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsチタン酸塩 / イオン交換 / 選択吸着 / フラックス育成 / 層状物質 / ナノシート / 剥離 / フラックス / リチウム / 層状化合物 / フラックス法 / 結晶
Outline of Research at the Start

Ca2+やNa+等に妨害されず,対象イオンだけを選択的に吸着するイオン交換体は僅少です。申請者は特定の結晶構造をもつ5配位チタン化合物は,従来のイオン交換体と真逆の選択性(負の離液順列)を示すことを見出しました。本研究では,二次元層状化合物のチタン酸塩を題材として,特定のイオンに対する親和性を制御することと選択性の起源を明らかにすることを目指します。

Outline of Final Research Achievements

Selectivity of ion exchangers is an important topic in adsorption science owing to its specific application in resource recovery and environmental remediation. In this study, the cation exchange property of the submillimeter sized five-coordinate K2Ti2O5 (KTO) crystals is demonstrated. Liquid exfoliation is a scalable and effective technique for preparing two-dimensional materials but suffers from several issues, including low yields and lack of control over the lateral size of the nanosheets. Herein, we report the flux-evaporation-assisted growth of millimeter-sized KTO single crystals and their liquid-phase hydrothermal exfoliation to form nanosheet colloids in water. X-ray absorption near edge structure (XANES) measurements of the KTO nanosheet colloid provide evidence that the KTO crystals undergo partial hydrolysis in water to generate hydroxyl groups on the surface, which weaken the interactions between the anionic frameworks and interlayer cations and accelerate exfoliation.

Academic Significance and Societal Importance of the Research Achievements

環境浄化・資源回収の観点から,選択的にイオンを吸着・分離する材料の必要性が高まっている。なかでも,無機イオン交換体は多様なナノ空間構造をもつため,イオン交換樹脂には見られない特異なイオン選択性をしばしば示す。今回、5配位チタン酸塩結晶の水和ナノ空間の局所構造が負の離液順列の起源であることを明らかにした。この知見は,新たな選択イオン交換体の設計につながると期待する

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (6 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] High Li-Ion Selectivity of Five-Coordinate Layered Titanate K<sub>2</sub>Ti<sub>2</sub>O<sub>5</sub>2022

    • Author(s)
      Hayashi Fumitaka、Tatewaki Nanako、Sudare Tomohito、Terashima Chiaki、Teshima Katsuya
    • Journal Title

      Langmuir

      Volume: 38 Issue: 43 Pages: 13288-13295

    • DOI

      10.1021/acs.langmuir.2c02443

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Liquid exfoliation of five-coordinate layered titanate K2Ti2O5 single crystals in water2022

    • Author(s)
      Hayashi Fumitaka、Furui Kenta、Tatewaki Nanako、Sudare Tomohito、Kashiwazaki Maru、Shiiba Hiromasa、Tanaka Hideki、Koyama Michihisa、Terashima Chiaki、Teshima Katsuya
    • Journal Title

      CrystEngComm

      Volume: 24 Issue: 28 Pages: 5112-5119

    • DOI

      10.1039/d2ce00512c

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] 層状チタン酸・ニオブ酸塩結晶のフラックス育成とその高効率剥離2022

    • Author(s)
      林文隆,梅原翔,帯刀菜奈子,古井健太,簾智仁,柏崎真瑠,椎葉寛将,藤澤一範,手嶋勝弥
    • Organizer
      日本化学会第102回春季年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 5配位チタン酸カリウム結晶のフラックス育成と剥離2022

    • Author(s)
      林文隆,帯刀菜奈子,古井健太,簾智仁,手嶋勝弥
    • Organizer
      日本セラミックス協会第34回秋季シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Five-coordinated layered titanate K2Ti2O5 crystal for water resource recovery2022

    • Author(s)
      Frumitaka Hayashi, Nanako Tatewaki, Maru Kashiwazaki, Tomohito Sudare, Hiromasa Shiiba, Katsuya Teshima
    • Organizer
      MRM
    • Related Report
      2022 Annual Research Report
  • [Presentation] Five-Coordinated Layered Titanate K2Ti2O5 Crystal for Water Resource Recovery2021

    • Author(s)
      F. Hayashi, N. Tatewaki, M. Kashiwazaki, T. Sudare, H. Shiiba, K. Teshima
    • Organizer
      MRM2021 Materials Research Meeting
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] チタン酸塩結晶のフラックス成長のその場観察と支配因子の統計解析2021

    • Author(s)
      深石航平・林文隆・山田哲也・簾智仁・金子弘昌・手嶋勝弥
    • Organizer
      日本フラックス成長研究会
    • Related Report
      2021 Research-status Report
  • [Presentation] 層状チタン酸・ニオブ酸塩結晶のフラックス育成とその高効率剥離2021

    • Author(s)
      林 文隆・梅原 翔・帯刀 菜奈子・古井 健太・簾 智仁・柏崎 真瑠・椎葉 寛将・藤澤 一範・手嶋 勝弥
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi