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Controlling the morphology and composition of Ag/AgBr hybrid nanostructures and enhancing their visible light induced photocatalytic properties

机译:控制Ag / Agbr杂交纳米结构的形态和组成,增强其可见光诱导光催化性能

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摘要

Here, we report a simple and fast synthetic route to Ag/AgBr hybrid nanostructures prepared by reducing AgBr nanoparticles synthesized by the reaction of Ag+ with Br- in the presence of polyethyleneimine (PEI). By controlling the experimental conditions including reaction temperature and amount of reducing agent, we could easily control the morphology and composition of a variety of Ag/AgBr hybrid nanostructures including Ag nanoparticles decorated with AgBr nanoparticles and hollow cage-like Ag-rich nanostructures. The Ag/AgBr hybrid nanostructures exhibited enhanced photocatalytic activity and recyclability for decomposing methylene blue (MB) under visible-light illumination because of a small bandgap (2.6 eV) and strong SPR effect. In particular, we found that the Ag/AgBr hybrid nanostructures showed a photocatalytic reaction rate that was 1000 times faster than commercial TiO2 (P-25). In addition, the Ag/AgBr hybrid nanostructures had a higher photocatalytic activity compared to Ag/AgCl hybrid nanostructures towards the decomposition of methyl orange (MO) under visible light illumination.
机译:在这里,我们通过在聚乙烯亚胺(PEI)存在下,通过减少通过Ag +的反应而在聚乙烯亚胺(PEI)存在下通过Ag +的反应而制备的Ag / Agbr杂交纳米结构进行简单且快速的合成途径。通过控制实验条件,包括反应温度和还原剂的量,我们可以容易地控制各种Ag / Agbr杂交纳米结构的形态和组成,包括用Agbr纳米粒子和中空笼状的富含Ag的纳米结构装饰的Ag纳米颗粒。 AG / AGBR杂交纳米结构表现出增强的光催化活性和可再循环在可见光照射下分解亚甲基蓝(MB)的可回收性,因为具有小的带隙(2.6eV)和强速效果强。特别地,我们发现Ag / Agbr杂交纳米结构显示出光催化反应速率,其比商业TiO 2快1000倍(p-25)。此外,与Ag / AgCl杂交纳米结构相比,Ag / Agbr杂交纳米结构具有较高的光催化活性,朝向可见光照射下甲基橙(Mo)的分解。

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  • 来源
    《RSC Advances》 |2016年第60期|共9页
  • 作者单位

    Kyung Hee Univ Coll Engn Dept Chem Engn Yongin 446701 South Korea;

    Kyung Hee Univ Coll Engn Dept Chem Engn Yongin 446701 South Korea;

    Kyung Hee Univ Coll Engn Dept Chem Engn Yongin 446701 South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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