Preparation and catalytic performance of gold magnetic particles
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摘要: 采用水热法快速制备Fe3O4纳米粒子,并通过表面氨基化与金纳米粒子自组装方法构建金磁微粒（Fe3O4@Au）,优化金磁微粒的制备工艺,并表征其性能。结果表明,1%浓度的葡萄皮浸泡液制备金纳米粒子,其粒子平均粒径为7 nm,氨基化的Fe3O4纳米粒子可以有效固载金纳米粒子,最优制备工艺为:Fe3O4混悬液添加量2 m L,温度60℃,时间60 min。金磁微粒饱和磁化强度为61 emu/g,且具有良好的催化性能。Abstract: In this experiment, the Fe3O4 nanoparticles were prepared using hydrothermal method. The gold magnetic particles ( Fe3O4@ Au) were formed by the Fe3O4 nanoparticles combined with gold nanoparticles using self-assembly method based on the surface amino groups. Fe3O4@ Au was characterized based on the optimization of process. The results showed that gold nanoparticles prepared by grape skin extract with 1% concentration and the average particle size were 7 nm. The Fe3O4 functionalized with amino groups could be loaded with gold nanoparticles, the optimum process combination was as follows: the addition of Fe3O4 suspension was 2 m L, the temperature was 60 ℃, and the time was 60 min. Fe3O4@ Au, whose saturation magnetization was 61 emu/g, showed strong catalytic properties.
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Keywords:
- food catalyst /
- magnetic materials /
- gold magnetic particles /
- amination
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