具有纳米通道的 Fe3O4@SiO2 核壳结构纳米反应器用于高效催化。

Nanoreactor of Fe3O4@SiO2 core-shell structure with nanochannels for efficient catalysis.

机构信息

State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, China.

出版信息

J Biomed Nanotechnol. 2009 Oct;5(5):586-90. doi: 10.1166/jbn.2009.1072.

DOI:10.1166/jbn.2009.1072

PMID:20201436

Abstract

We introduced a new nanoreactor system consisting of nanochannel-filled Fe3O4 core and SiO2 shell. Different morphologies of Fe3O4@SiO2 core-shell nanostructures could be obtained through simple HCl etching of the magnetic cores. The outer silica shells were permeable and the Fe3O4 cores were accessible to the reactants. Therefore, the present nanoreactor system was applied to catalyze the reduction of H2O2, and it showed outstanding catalytic activity compared with bare Fe3O4 or Fe3O4@SiO2 core-shell nanoparticles.

摘要

我们引入了一种由纳米通道填充的 Fe3O4 核和 SiO2 壳组成的新型纳米反应器系统。通过简单的 HCl 刻蚀磁性核，可以获得具有不同形态的 Fe3O4@SiO2 核壳纳米结构。外二氧化硅壳是可渗透的，而 Fe3O4 核可以与反应物接触。因此，该纳米反应器系统被应用于催化 H2O2 的还原，与裸 Fe3O4 或 Fe3O4@SiO2 核壳纳米粒子相比，表现出了优异的催化活性。