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首页> 外文期刊>Chemistry: A European journal >A general approach to fabricate diverse noble-metal (Au, Pt, Ag, Pt/Au)/Fe_2O_3 hybrid nanomaterials
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A general approach to fabricate diverse noble-metal (Au, Pt, Ag, Pt/Au)/Fe_2O_3 hybrid nanomaterials

机译：一种制备多种贵金属（Au，Pt，Ag，Pt / Au）/ Fe_2O_3杂化纳米材料的通用方法

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摘要

A novel, facile, and general one-pot strategy is explored for the synthesis of diverse noble-metal (Au, Pt, Ag, or Pt/Au)/Fe_2O_3 hybrid nanoparticles with the assistance of lysine (which is a nontoxic, user friendly amino acid that is compatible with organisms) and without using any other functionalization reagents. Control experiments show that lysine, which contains both amino and carboxylic groups, plays dual and crucial roles as both linker and capping agents in attaching noble metals with a small size and uniform distribution onto an Fe_2O_3 support. Considering the perfect compatibility of lysine with organism, this approach may find potentials in biochemistry and biological applications. Furthermore, this novel route is also an attractive alternative and supplement to the current methods using a silane coupling agent or polyelectrolyte for preparing hybrid nanomaterials. To demonstrate the usage of such hybrid nanomaterials, a chemical gas sensor has been fabricated from the as-synthesized Au/Fe_2O _3 nanoparticles and investigated for ethanol detection. Results show that the hybrid sensor exhibits significantly improved sensor performances in terms of high sensitivity, low detection limit, better selectivity, and good reproducibility in comparison with pristine Fe_2O_3. Most importantly, this general approach can be further employed to fabricate other hybrid nanomaterials based on different support materials.
机译：探索一种新颖，简便，通用的一锅策略，在赖氨酸的帮助下合成多种贵金属（Au，Pt，Ag或Pt / Au）/ Fe_2O_3杂化纳米颗粒（这是一种无毒，用户友好的方法）与生物相容的氨基酸），并且不使用任何其他功能化试剂。对照实验表明，同时包含氨基和羧基的赖氨酸在将小尺寸且均匀分布的贵金属附着到Fe_2O_3载体上时，起着连接剂和封端剂的作用，起着至关重要的双重作用。考虑到赖氨酸与生物体的完美相容性，这种方法可能会在生物化学和生物应用中发现潜力。此外，这种新颖的途径也是一种有吸引力的替代方法，并且是对使用硅烷偶联剂或聚电解质制备混合纳米材料的现有方法的补充。为了证明这种杂化纳米材料的用途，已经从合成后的Au / Fe_2O_3纳米粒子制造出了化学气体传感器，并对其进行了乙醇检测。结果表明，与原始Fe_2O_3相比，混合传感器在高灵敏度，低检测限，更好的选择性和良好的重现性方面均表现出显着改善的传感器性能。最重要的是，可以进一步采用这种通用方法来制造基于不同载体材料的其他杂化纳米材料。

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