Development of Diamond-shaped Particle Assemblies Using Magnetic Interaction

利用磁相互作用开发菱形颗粒组件

• 批准号: 24655185
• 负责人: OHTANI Bunsho
• 金额: $ 2.58万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24655185/
• 关键词: ナノ粒子; 粒子集積体; 磁気粒子; 中空コアシェル構造; ヘマタイト型酸化鉄; マグネタイト型酸化鉄; マグヘマイト型酸化鉄; 酸化チタン; マグネタイト; ヘマタイト; マグヘマイト

Preparation method for article assemblies of tetragonal shape using hollow core-shell (hcs) magnetic particles were investigated. First, as a model compound of hcs magnetic particles, titania-core silica-shell hcs particles were successfully prepared and checked their photocatalytic activity for organic synthetic reactions. Then, preparation of hcs magnetic particles through coating of magnetite iron oxide particles with amorphous carbon and silica followed by calcination for removal of carbon layer was tried to obtain hcs magnetic particles with magnetic core of particles assemblies, presumably due to strong magnetic interaction between iron oxide particles. Another strategy for hcs magnetic particles by preparation of non-magnetic hcs particles followed by magnetization was attempted and the latter magnetization reaction was confirmed. The preparation of non-magnetic hcs particles using non-magnetic hematite iron oxide particles was failed due to aggregation.

研究了用空心核壳(HCS)磁性粒子制备四方形物组件的方法。首先，作为HCS磁性粒子的模型化合物，成功制备了二氧化钛核硅壳HCS粒子，并考察了其对有机合成反应的光催化活性。然后，尝试通过无定形碳和二氧化硅包覆磁铁氧化物颗粒，然后焙烧去除碳层来制备HCS磁性颗粒，以获得具有磁性核心的颗粒组装，这可能是由于氧化铁颗粒之间强烈的磁相互作用。尝试了另一种制备HCS磁性颗粒的策略，即先制备非磁性HCS颗粒，然后再磁化，并证实了后一种磁化反应。用非磁性赤铁矿氧化铁粒子制备非磁性羟基磷灰石粒子因团聚而失败。

项目成果

Preparation and Reaction of Titania Particles Encapsulated in Hollow Silica Shells as an Efficient Photocatalyst for Stereoselective Synthesis of Pipecolinic Acid

空心二氧化硅壳封装二氧化钛颗粒的制备及其反应作为立体选择性合成哌啶酸的高效光催化剂

• DOI: 10.1246/cl.2012.677
• 发表时间: 2012
• 期刊: Chem. Lett.
• 作者: Sheela Chandren;Bunsho Ohtani
• 通讯作者: Bunsho Ohtani

Efficient Photocatalytic Stereoselective Synthesis of Pipecolinic Acid by Hollow Core-Shell Silica-Titania Particles

空心核壳二氧化硅-二氧化钛颗粒高效光催化立体选择性合成哌啶酸

• 发表时间: 2013
• 作者: Sheela Chandren;Bunsho Ohtani;Bunsho Ohtani and Sheela Chandren
• 通讯作者: Bunsho Ohtani and Sheela Chandren

Stereoselective Photocatalytic Organic Synthesis of L-Pipecolinic Acid from Lysine Using Hollow Titania-core Silica-shell Particles

利用空心二氧化钛核二氧化硅壳粒子以赖氨酸为原料立体选择性光催化有机合成L-哌啶甲酸

• 发表时间: 2013
• 作者: Sheela Chandren;Bunsho Ohtani;Bunsho Ohtani and Sheela Chandren;Bunsho Ohtani and Sheela Chandren
• 通讯作者: Bunsho Ohtani and Sheela Chandren

Preparation, characterization and photocatalytic performance of titania particles encapsulated in hollow silica shells as an efficient photocatalyst for redox-combined stereoselective synthesis of L-pipecolinic acid from L-lysine

• DOI: 10.1016/j.jphotochem.2012.07.007
• 发表时间: 2012-10
• 期刊: Journal of Photochemistry and Photobiology A-chemistry
• 影响因子: 4.3
• 作者: S. Chandren;B. Ohtani

A Hollow Core-Shell Silica-Titania Photocatalyst for Efficient Stereoselective Synthesis of Pipecolinic Acid

一种用于高效立体选择性合成哌啶酸的空心核壳二氧化硅-二氧化钛光催化剂

• 发表时间: 2013
• 作者: Sheela Chandren;Bunsho Ohtani;Bunsho Ohtani and Sheela Chandren;Bunsho Ohtani and Sheela Chandren;Bunsho Ohtani and Sheela Chandren
• 通讯作者: Bunsho Ohtani and Sheela Chandren