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首页> 外文期刊>Chemistry: A European journal >Biomineralized Multifunctional Magnetite/Carbon Microspheres for Applications in Li-Ion Batteries and Water Treatment
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Biomineralized Multifunctional Magnetite/Carbon Microspheres for Applications in Li-Ion Batteries and Water Treatment

机译：生物矿化的多功能磁铁矿/碳微球在锂离子电池和水处理中的应用

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摘要

Advanced functional materials incorporating well-defined multiscale architectures are a key focus for multiple nanotechnological applications. However, strategies for developing such materials, including nanostructuring, nano-/microcombination, hybridization, and so on, are still being developed. Here, we report a facile, scalable biomineralization process in which Micrococcus lylae bacteria are used as soft templates to synthesize 3D hierarchically structured magnetite (Fe3O4) microspheres for use as Li-ion battery anode materials and in water treatment applications. Self-assembled Fe3O4 microspheres with flower-like morphologies are systematically fabricated from biomineralized 2D FeO(OH) nanoflakes at room temperature and are subsequently subjected to post-annealing at 400 degrees C. In particular, because of their mesoporous properties with a hollow interior and the improved electrical conductivity resulting from the carbonized bacterial templates, the Fe3O4 microspheres obtained by calcining the FeO(OH) in Ar exhibit enhanced cycle stability and rate capability as Li-ion battery anodes, as well as superior adsorption of organic pollutants and toxic heavy metals.
机译：结合定义明确的多尺度体系结构的高级功能材料是多种纳米技术应用的重点。但是，仍在开发用于开发这种材料的策略，包括纳米结构化，纳米/微结合，杂交等。在这里，我们报告了一种简便，可扩展的生物矿化过程，其中，微球菌lylae细菌被用作软模板来合成3D分层结构的磁铁矿（Fe3O4）微球，用作锂离子电池负极材料和水处理应用。具有花朵状形态的自组装Fe3O4微球是由生物矿化的二维FeO（OH）纳米片在室温下系统制造的，随后在400摄氏度下进行后退火。特别是，由于它们具有中空内部介孔特性和碳化细菌模板提高了电导率，通过在Ar中煅烧FeO（OH）获得的Fe3O4微球表现出增强的循环稳定性和速率（如锂离子电池阳极）的速率能力，以及对有机污染物和有毒重金属的出色吸附。

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