Synthesis of a morphology controllable Fe3O4 nanoparticle/hydrogel magnetic nanocomposite inspired by magnetotactic bacteria and its application in H2O2 detection
Synthesis of a morphology controllable Fe3O4 nanoparticle/hydrogel magnetic nanocomposite inspired by magnetotactic bacteria and its application in H2O2 detection
复制标题
趋磁细菌启发形貌可控Fe3O4纳米颗粒/水凝胶磁性纳米复合材料的合成及其在H2O2检测中的应用
DOI：
10.1039/c3gc41535j
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发表时间：
2014-01-01
期刊：
影响因子：
9.8
通讯作者：
Osada, Yoshihito
中科院分区：
文献类型：
--
作者：
Gao, Yang;Wei, Zhao;Osada, Yoshihito
由于Fe 3 O 4纳米粒子的催化活性依赖于其形状，因此控制其形貌具有重要意义。在这项工作中，我们提出了一个简单的，无毒的，水基的磁性纳米粒子/水凝胶纳米复合材料的制造策略，其中高度结晶的Fe 3 O 4纳米八面体可以在带负电荷的水凝胶基质内原位制造。通过调节水凝胶的交联浓度可以很容易地调节Fe 3 O 4纳米晶的形貌。进一步研究了磁性纳米复合材料的催化活性，发现负载Fe 3 O 4纳米八面体的磁性纳米复合材料具有良好的催化活性，对H2 O2的检测具有灵敏的响应。这种可扩展的方法用于制备磁性纳米复合材料，负载有形貌可控的Fe 3 O 4纳米颗粒，潜在地促进其在生物技术和环境化学中的应用。
Owing to the shape-dependent catalytic activity of Fe3O4 nanoparticles, controlling their morphology is of great significance. In this work, we propose a simple, nontoxic, water-based strategy for the fabrication of magnetic nanoparticle/hydrogel nanocomposites in which highly crystalline Fe3O4 nanooctahedra can be fabricated in situ within a negatively charged hydrogel matrix. The morphology of the Fe3O4 nanocrystals can be easily tuned by adjusting the crosslinking concentration of the hydrogel. Furthermore, the catalytic activities of the magnetic nanocomposites were studied, and the magnetic nanocomposite loaded with Fe3O4 nanooctahedra exhibited excellent catalytic activity and provided a sensitive response toward H2O2 detection. This scalable approach for the fabrication of magnetic nanocomposites, loaded with morphology controllable Fe3O4 nanoparticles, potentially promotes their applications in biotechnology and environmental chemistry.