ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Application of DLS for metal nanoparticle size determination in supported catalysts

Yu. V. Larichev

Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

E-mail: ylarichev@gmail.com

Received: 8 July 2020  Accepted: 24 November 2020

Abstract:

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.

Keywords: DLS; Supported metal catalysts; Sols; Selective dissolution

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01454-1

Chemical Papers 75 (5) 2059–2066 (2021)