Synthesis of nano-sized titanates using active amorphous TiO2

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K14458
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Properties in chemical engineering process/Transfer operation/Unit operation
• Research Institution: Osaka University
• Principal Investigator: Nishiyama Norikazu 大阪大学, 基礎工学研究科, 教授 (10283730)
• Research Collaborator: Ota Misaki
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: 酸化チタン / チタン酸 / チタン酸リチウム / バイオマス変換 / Liイオン電池

Outline of Final Research Achievements

Nano-sized titanates were successfully synthesized at low temperature using amorphous titanium dioxide nanoparticles with a high surface area. The conventional synthesis methods of titanates require high temperature and high pressure. The amine-modified hydrogen titanate nanotubes showed high CO2 adsorption capacity. The hydrogen titanate nanotubes exhibited high solid acid catalytic activity for biomass conversion reaction from glucose into hydroxylmethylfurfural. The lithium titanate nanoparticles showed high cyclic stability and rate performance as an anode for lithium ion battery.

Free Research Field

化学工学

Academic Significance and Societal Importance of the Research Achievements

チタン酸化合物とはチタンともう一種の元素を含む酸化物の総称であり，触媒や電池材料、吸着剤としてチタン酸化合物は魅力ある材料の一つである．本研究では、チタン酸（H2Ti3O7）やチタン酸リチウム（Li4Ti5O12）の機能向上のために、粒子やチューブをナノサイズ化し，高表面積化する手法を開発した．ナノサイズ化の影響は大きく、これまでにない触媒性能、吸着分離性能、電特性を示した。