Skip to main content

Research Repository

Advanced Search

Formation of Copper Nanoparticles in LTL Nanosized Zeolite: Kinetics Study

Kharchenko, A; Zholobenko, V; Lebedev, OI; de Waele, V; Mintova, S


A Kharchenko

V Zholobenko

OI Lebedev

V de Waele

S Mintova


The kinetics of formation of copper nanoparticles in LTL type nanosized zeolite (Cu0-LTL) was investigated. The water suspensions containing copper ion exchanged zeolite crystals (Cu2+-LTL) were treated with three reducing agents (hydrazine monohydrate, triethylamine, and sodium borohydride) under identical conditions. With triethylamine, copper particles (Cu0 NPs) were not formed, while with sodium borohydride, a rapid reduction of Cu2+ leading to Cu0 nanoparticles predominantly located on the external surface of the LTL zeolite nanocrystals was observed, whereas the reaction with hydrazine led to slow reduction and formation of Cu0 NPs within the LTL zeolite channels. The kinetics of formation of Cu0 NPs in the LTL zeolite suspension was investigated by in situ UV–vis spectroscopy. Additionally, the solid samples (pure LTL, Cu2+-LTL and Cu0-LTL) were isolated before and at different stages of reduction and investigated with XRD, nitrogen sorption, and high-resolution transmission electron microscopy (HRTEM). The initial copper nanoparticles with a size of 0.2–1.6 nm were observed after 190 min of reduction in the presence of hydrazine, and under prolonged treatment (from 280 to 960 min), the copper nanoparticles tend to migrate to the external surface of the zeolite crystals and aggregate into large copper entities. The structure of the nanosized LTL zeolite crystals was preserved from the initial to the final stages of reduction.


Kharchenko, A., Zholobenko, V., Lebedev, O., de Waele, V., & Mintova, S. (2016). Formation of Copper Nanoparticles in LTL Nanosized Zeolite: Kinetics Study. Journal of Physical Chemistry C, 26300-26308.

Acceptance Date Nov 4, 2016
Publication Date Nov 4, 2016
Journal The Journal of Physical Chemistry Part C
Print ISSN 1932-7447
Publisher American Chemical Society
Pages 26300-26308
Publisher URL