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Application of DLS for metal nanoparticle size determination in supported catalysts
Chemical Papers ( IF 2.2 ) Pub Date : 2021-01-05 , DOI: 10.1007/s11696-020-01454-1
Yu. V. Larichev

A new technique STS (from solids to sols) for study of supported metal catalysts by Dynamic Light Scattering (DLS) has been proposed. This technique has been tested on a set of supported gold catalysts with wide range of metal particle sizes. We have prepared a set of Au/Al2O3 catalysts and previously studied them by TEM and XRD. Then using STS technique Au-containing sols were prepared from these catalysts. These Au-containing sols were subsequently studied by UV–Vis spectroscopy and DLS. We found that sizes of gold nanoparticles in initial solid catalysts and in sols prepared from them have similar sizes. Thereby, the possibility of determination of particle sizes in supported metal catalysts using more simple, sensitive and quick methods was demonstrated in this work.



中文翻译:

DLS在负载型催化剂中金属纳米粒度测定中的应用

提出了一种通过动态光散射(DLS)研究负载型金属催化剂的新技术(从固体到溶胶)。该技术已在一组具有广泛金属粒度的负载型金催化剂上进行了测试。我们已经制备了一套Au / Al 2 O 3催化剂,并通过TEM和XRD对其进行了研究。然后使用STS技术从这些催化剂制备含金的溶胶。随后通过紫外-可见光谱和DLS研究了这些含金的溶胶。我们发现,初始固体催化剂和由它们制备的溶胶中金纳米颗粒的大小具有相似的大小。因此,在这项工作中证明了使用更简单,灵敏和快速的方法测定载体金属催化剂中粒径的可能性。

更新日期:2021-01-05
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