Low-temperature synthesis and functionalization of inorganic particles from hydrous metal oxides with controlled reactivity

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K05223
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
• Research Institution: Chiba University
• Principal Investigator: Kojima Takashi 千葉大学, 大学院工学研究院, 准教授 (70333896)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 粒子 / 水和酸化物 / 反応性制御 / 低温結晶化 / 金属酸化物 / 複合酸化物 / 水熱 / 結晶成長

Outline of Final Research Achievements

The reactivity of spherical and porous hydrous metal oxide particles was controlled, and their crystallization behaviors in aqueous solutions at lower temperatures were examined. In particular, the influence of the drying state of hydrous metal oxide particles was evaluated. The fabrication procedure of porous hydrous tantalum oxide particles with uniform spherical outer shapes was also newly established. Various composite oxide particles with novel microstructures were obtained by heating hydrous metal oxide particles in aqueous solutions of other metal ion species. The method established in this study for obtaining particles with high specific surface area and characteristic morphology is beneficial for preparing adsorbents and catalysts at low temperatures.

Free Research Field

無機合成化学

Academic Significance and Societal Importance of the Research Achievements

本研究は、水和酸化物の反応性を積極的にコントロールし、酸化物材料の原料として用いることにより、様々な単一金属および複合酸化物粒子の粒径・形態・機能性を制御可能な幅を大いに拡げられることを新規に見いだした。この成果は基礎的・応用的にも幅広い波及効果を与え、様々な無機微粒子材料はもちろんのこと、微粒子を原料とする部材の性能を、安価で環境負荷が低い調製条件で大いに向上させると期待できる。