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首页> 外文期刊>Advanced Functional Materials >Highly Efficient Coaxial TiO2-PtPd Tubular Nanomachines for Photocatalytic Water Purification with Multiple Locomotion Strategies
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Highly Efficient Coaxial TiO2-PtPd Tubular Nanomachines for Photocatalytic Water Purification with Multiple Locomotion Strategies

机译：具有多种运动策略的高效同轴TiO2-PtPd管状纳米管用于光催化水净化

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摘要

Titania is a promising photocatalyst for water purification or production of solar fuels. However, due to its large band gap, titania is photoactive solely under UV light, which accounts for less than 5% of the solar spectrum. In this work, TiO2-based hybrid 1D nanostructures with photocatalytic activities extended to visible light region are designed and fabricated. Highly efficient coaxial TiO2-PtPd-Ni nanotubes (NTs) are fabricated by a template-assisted electrochemical synthesis route for water remediation under UV light, visible light, and natural sunlight. These coaxial hybrid nanotubes display a 100% degradation of organic pollutant rhodamine B in only 50 min (k-value 0.071 min(-1)) and 30 min under visible light and natural sunlight, respectively. For comparison, TiO2 nanotubes doped with Pd nanoparticles are also fabricated and they show inferior photocatalytic properties and degrading stability over time. The multicomponent design enables to actuate the hybrid NTs by using two different external energy sources, i.e., magnetic and acoustic fields. Self-propelled, autonomous actuation in the presence of H2O2 is also realized. These versatile actuation modes have the potential to enable the reported photocatalytic nanomachines to work efficiently under complex environments and to be easily collected for reuse.
机译：二氧化钛是用于水净化或生产太阳能燃料的有前途的光催化剂。但是，由于二氧化钛的带隙大，仅在紫外线下才具有光活性，而紫外线仅占太阳光谱的5％。在这项工作中，设计并制造了具有光催化活性的TiO2基杂化一维纳米结构。高效同轴TiO2-PtPd-Ni纳米管（NTs）是通过模板辅助电化学合成路线制造的，用于在紫外线，可见光和自然阳光下进行水修复。这些同轴混合纳米管分别在可见光和自然光下分别在50分钟（k值0.071 min（-1））和30分钟内显示100％的有机污染物若丹明B降解。为了进行比较，还制备了掺杂有Pd纳米颗粒的TiO2纳米管，它们显示出较差的光催化性能和随时间的降解稳定性。多部件设计使得能够通过使用两个不同的外部能量源，即磁场和声场来驱动混合NT。在H2O2存在的情况下，也可以实现自驱动，自主驱动。这些通用的致动模式具有使报道的光催化纳米机械在复杂环境下有效工作并易于收集以供重复使用的潜力。

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  • 来源
    《Advanced Functional Materials》 |2016年第38期|6995-7002|共8页
  • 作者

    Mushtaq Fajer; Asani Agim; Hoop Marcus; Chen Xiang-Zhong; Ahmed Daniel; Nelson Bradley J.; Pane Salvador;

  • 作者单位

    Swiss Fed Inst Technol, IRIS, MSRL, CH-8092 Zurich, Switzerland;

    Swiss Fed Inst Technol, IRIS, MSRL, CH-8092 Zurich, Switzerland;

    Swiss Fed Inst Technol, IRIS, MSRL, CH-8092 Zurich, Switzerland;

    Swiss Fed Inst Technol, IRIS, MSRL, CH-8092 Zurich, Switzerland;

    Swiss Fed Inst Technol, IRIS, MSRL, CH-8092 Zurich, Switzerland;

    Swiss Fed Inst Technol, IRIS, MSRL, CH-8092 Zurich, Switzerland;

    Swiss Fed Inst Technol, IRIS, MSRL, CH-8092 Zurich, Switzerland;

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