Kyushu University · 재료과학
타쿠야 키타오카 교수의 연구실은 천연 유기계 고분자, 특히 셀룰로오스를 기반으로 한 나노소재를 활용한 고성능 나노촉매 및 기능성 복합재료 개발에 주력하고 있습니다. 특히 금·銀 나노입자를 셀룰로오스 나노섬유나 MOFs 등에 정밀하게 통합함으로써 촉매 효율성과 선택성을 극대화하는 톱오카미컬 합성 기반의 혁신적 접근을 펼치고 있습니다. 또한 생체 모방적 3D 구조의 세포 배양 기반 소재 및 환경 친화적인 유기-무기 복합체 개발도 핵심 연구 분야입니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Topochemical synthesis of gold nanoparticles (AuNPs) was achieved on crystalline cellulose single nanofibers (CSNFs), which were tailored from native cellulose. Exposed AuNPs@CSNFs composite exhibited an excellent catalytic efficiency: the turnover frequency of the AuNPs@CSNFs was up to 840 times that of conventional polymer-supported AuNPs, for a model aqueous reduction reaction. Our novel strategy provides a promising solution to realize efficient use of limited noble metals using natural bior
Metal-organic frameworks (MOFs) are synthesized at carboxy groups on crystalline TEMPO-oxidized cellulose nanofibers (TOCNs). MOF-TOCN films coated on a paper filter have a hierarchical structure from the nano- to macroscale, and demonstrate a high CO2 /CH4 selectivity, over 120 for CO2 at a high gas flux, by the combination of the nanoporous MOFs and the gas-barrier TOCNs, which have strong affinity with each other.
Silver nanoparticles (AgNPs) were successfully synthesized in situ on a paper matrix composed of ceramic fibers as the main framework and zinc oxide (ZnO) whiskers as a selective support for AgNPs. Paper-like ceramic fiber/ZnO whisker composites were prepared in advance using a high-speed, low-cost papermaking technique, then immersed in an aqueous solution of silver nitrate for 6 h. AgNPs with particle size 5–20 nm were spontaneously formed on the ZnO whiskers through selective ion-exchange bet
The structural and functional design of metal nanoparticles has recently allowed remarkable progress in the development of high-performance catalysts. Gold nanoparticles (AuNPs) are among the most innovative catalysts, despite bulk Au metal being regarded as stable and inactive. The hybridization of metal NPs has attracted major interest in the field of advanced nanocatalysts, due to electro-mediated ligand effects. In practical terms, metal NPs need to be supported on a suitable matrix to avoid
Abstract Highly porous three‐dimensional (3D) scaffolds can mimic the lobular structure of a human liver where hepatocytes are organized. However, 3D scaffolds with uniformly porous and oriented structures are challenging to fabricate without cross‐linking agents. Herein, this work presents a Pickering emulsion‐induced interface approach to construct aligned porous scaffolds for 3D cell cultures through the combined use of surface‐carboxylated cellulose nanofibers and chitosan nanofibers as stab
