Microwave-assisted one-pot synthesis of anisotropic gold nanoparticles with active high-energy facets for enhanced catalytic and metal enhanced fluorescence activities†,CrystEngComm

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Microwave-assisted one-pot synthesis of anisotropic gold nanoparticles with active high-energy facets for enhanced catalytic and metal enhanced fluorescence activities†
CrystEngComm ( IF 2.6 ) Pub Date : 2018-06-20 00:00:00 , DOI: 10.1039/c8ce00654g
N. V. S. Praneeth _{1,

2,

3,

4,

5} , Santanu Paria _{1,

2,

3,

4,

5}

Affiliation

A simple sustainable method has been reported for the synthesis of highly active Au nanoparticles (NPs) having sharp edges and corners using oxalic acid as a reducing agent. Different chloroauric acid to oxalic acid mixing ratios were studied and it was found that the 1 : 3 ratio gives better structures with high energy {110} facets, which are highly efficient for catalysis and metal enhanced fluorescence (MEF) activities because of the presence of many edges and corners. The reaction rate was also found to be fast at 50 °C compared to that under the ambient conditions. In the case of microwave (MW) heating, the control of the size and shape of Au NPs was better than that in hotplate heating. The MEF of rose bengal (RB) dye was found to be 5.0 times better for Au NPs synthesized at a 1 : 3 mixing ratio and under MW heating compared to spherical NPs. The same NPs were also found to have very good efficiency in metal enhanced singlet oxygen generation and catalytic reduction of 4-nitrophenol to 4-aminophenol.

中文翻译：

微波一锅法合成具有活性高能刻面的各向异性金纳米粒子，以增强催化和金属增强的荧光活性†

已经报道了一种简单的可持续方法，该方法使用草酸作为还原剂来合成具有锋利的边缘和角落的高活性金纳米颗粒（NP）。研究了不同的氯金酸与草酸的混合比例，发现1：3的比例可提供具有较高能量{110}面的更好结构，由于存在以下成分，它们对于催化和金属增强的荧光（MEF）活性非常有效。许多边缘和角落。与环境条件下的反应速率相比，在50°C下的反应速率也很快。在微波加热的情况下，对金纳米颗粒的尺寸和形状的控制比在加热板加热中更好。发现玫瑰孟加拉（RB）染料的MEF比以1：与球形NP相比，混合比为3，并且在MW加热下。还发现相同的NP在金属增强的单线态氧产生和将4-硝基苯酚催化还原成4-氨基苯酚中具有非常好的效率。

更新日期：2018-06-20

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