1. In situ loading of gold nanoparticles on Fe3O4@SiO2 magnetic nanocomposites and their high catalytic activity
- Author
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Jing Hu, Xingguo Chen, Ya-lei Dong, Yanhua Ma, Weifeng Wang, Xiao-jiao Chen, and Jin-min Zheng
- Subjects
Materials science ,Nanocomposite ,Nanoparticle ,Metal Nanoparticles ,One-Step ,Nanotechnology ,Selective catalytic reduction ,engineering.material ,Aminophenols ,Silicon Dioxide ,Nanomaterial-based catalyst ,Catalysis ,Ferrosoferric Oxide ,Nanocomposites ,Nitrophenols ,Magnetics ,Colloidal gold ,engineering ,General Materials Science ,Noble metal ,Gold ,Oxidation-Reduction - Abstract
In this work, a facile approach was successfully developed for in situ catalyzing Au nanoparticles loaded on Fe3O4@SiO2 magnetic nanospheres via Sn(2+) linkage and reduction. After the Fe3O4@SiO2 MNPs were first prepared via a sol-gel process, only one step was needed to synthesize the Fe3O4@SiO2-Au magnetic nanocomposites (Fe3O4@SiO2-Au MNCs), so that both the synthesis step and the reaction cost were remarkably decreased. Significantly, the as-synthesized Fe3O4@SiO2-Au MNCs showed high performance in the catalytic reduction of 4-nitrophenol to 4-aminophenol and could be reused for several cycles with convenient magnetic separability. This approach provided a useful platform based on Fe3O4@SiO2 MNPs for the fabrication of Au or other noble metal magnetic nanocatalysts, which would be very useful in various catalytic reductions.
- Published
- 2013