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首页> 外文期刊>RSC Advances >Rational design of plasmonic catalysts: matching the surface plasmon resonance with lamp emission spectra for improved performance in AgAu nanorings
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Rational design of plasmonic catalysts: matching the surface plasmon resonance with lamp emission spectra for improved performance in AgAu nanorings

机译：等离子体催化剂的合理设计：匹配灯发射光谱的表面等离子体共振，以改善AGAU纳米的性能

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摘要

In order to enable practical applications of SPR-excitation in heterogeneous catalysis, facile procedures for the synthesis of plasmonic catalysts as well as the use of commercially available and inexpensive lamps as the excitation source are highly desirable. In this context, the development of catalysts displaying SPR extinction that matches, as much as possible, the emission spectra of commercially available lamps represent an intuitive strategy to maximize performance. We report the design and facile synthesis of AgAu nanorings displaying SPR extinction that closely matches the emission spectra of a commercial halogen-tungsten lamp. The AgAu nanorings were employed as catalysts for the SPR-mediated oxidation of methylene blue in the liquid phase (water as the solvent), under ambient conditions, and using a halogen-tungsten lamp as the only energy input. The activity of the nanorings was benchmarked against Ag and Au nanospheres. We found that the activity of the nanorings was higher relative to the nanospheres, and that both hot electrons and holes generated as a result of the SPR excitation participated in the methylene blue oxidation reaction with similar relative contributions. Our results show that the rational design of metallic nanostructures plays an important role for enabling practical applications in the field of plasmonic catalysis, in which facile procedures can be employed for the synthesis of the catalysts (attractive for large-scale production) and commercial lamps may be used as the only energy input.
机译：为了使SPR激发的实际应用在异质催化中，适用于基质催化剂的合成的容易程序以及作为激发源的市售和廉价灯的使用是非常理想的。在这种情况下，尽可能地显示匹配的SPR灭火的催化剂的开发代表了最大化性能的直观策略。我们报告了Alau纳米的设计和容易合成，显示了SPR灭火的闪光，与商业卤素灯的发射光谱密切相关。在环境条件下，将AlaA纳米作为SPR介导的液相（作为溶剂）中的亚甲基蓝氧化氧化，并使用卤素 - 钨灯作为唯一的能量输入。纳米的活性与Ag和Au纳米球有基准。我们发现，纳米的活性相对于纳米球更高，并且由于SPR激发而产生的热电子和孔都参与了与类似相对贡献类似的亚甲基蓝氧化反应。我们的研究结果表明，金属纳米结构的合理设计对于实现血浆催化领域的实际应用起重要作用，其中容易程序可用于合成催化剂（对大规模生产的吸引力）和商业灯可能用作唯一的能量输入。

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  • 来源
    《RSC Advances》 |2016年第67期|共5页
  • 作者

    Rodrigues Thenner S.; da Silva Anderson G. M.; de Moura Arthur B. L.; Freitas Isabella G.; Camargo Pedro H. C.;

  • 作者单位

    Univ Sao Paulo Inst Quim Dept Quim Fundamental Av Prof Lineu Prestes 748 BR-05508000 Sao Paulo SP Brazil;

    Univ Sao Paulo Inst Quim Dept Quim Fundamental Av Prof Lineu Prestes 748 BR-05508000 Sao Paulo SP Brazil;

    Univ Sao Paulo Inst Quim Dept Quim Fundamental Av Prof Lineu Prestes 748 BR-05508000 Sao Paulo SP Brazil;

    Univ Sao Paulo Inst Quim Dept Quim Fundamental Av Prof Lineu Prestes 748 BR-05508000 Sao Paulo SP Brazil;

    Univ Sao Paulo Inst Quim Dept Quim Fundamental Av Prof Lineu Prestes 748 BR-05508000 Sao Paulo SP Brazil;

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  • 正文语种 eng
  • 中图分类 化学;
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