Formation of metallic silver and copper in non-aqueous media by ultrasonic radiation

Martina Pilloni; Vijay Bhooshan Kumar; Guido Ennas; Ze'ev Porat; Alessandra Scano; Valentina Cabras; Aharon Gedanken

doi:10.1016/j.ultsonch.2018.04.018

Formation of metallic silver and copper in non-aqueous media by ultrasonic radiation

Martina Pilloni, Vijay Bhooshan Kumar, Guido Ennas, Ze'ev Porat, Alessandra Scano, Valentina Cabras, Aharon Gedanken

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Concentrated suspensions of silver and copper salts in silicone oil were heated to 200 °C and irradiated with ultrasonic energy for different time durations. Characterization of the products was done using X-ray powder diffraction. In most cases, metallic Ag or Cu were obtained, together with their oxide forms Ag₂O and Cu₂O. The salts, used as precursors, do not dissolve in silicone oil but rather form a heterogeneous system, and we assume that local heating, caused by the acoustic cavitation, enhanced their thermal decomposition and the formation of metallic particles. It was found that the presence of silver particles enhances the formation of metallic copper. This phenomenon was observed in the experiment with the acetate salts mixture.

Original language	English
Pages (from-to)	108-113
Number of pages	6
Journal	Ultrasonics Sonochemistry
Volume	47
DOIs	https://doi.org/10.1016/j.ultsonch.2018.04.018
State	Published - Oct 2018

Bibliographical note

Publisher Copyright:
© 2018

Funding

M. Pilloni was granted by Regione Autonoma della Sardegna (RAS) within the Master & Back program, POR Sardegna FSE 2007–2013, L.R. 7/2007.

Funders	Funder number
Faculty of Science and Engineering, University of Manchester
Regione Autonoma della Sardegna

Keywords

Cavitation
Intramolecular reduction
Metal salts
Silicone oil
Sonochemistry
Thermally induced reduction

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10.1016/j.ultsonch.2018.04.018

Cite this

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abstract = "Concentrated suspensions of silver and copper salts in silicone oil were heated to 200 °C and irradiated with ultrasonic energy for different time durations. Characterization of the products was done using X-ray powder diffraction. In most cases, metallic Ag or Cu were obtained, together with their oxide forms Ag2O and Cu2O. The salts, used as precursors, do not dissolve in silicone oil but rather form a heterogeneous system, and we assume that local heating, caused by the acoustic cavitation, enhanced their thermal decomposition and the formation of metallic particles. It was found that the presence of silver particles enhances the formation of metallic copper. This phenomenon was observed in the experiment with the acetate salts mixture.",

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AU - Pilloni, Martina

AU - Kumar, Vijay Bhooshan

AU - Ennas, Guido

AU - Porat, Ze'ev

AU - Scano, Alessandra

AU - Cabras, Valentina

AU - Gedanken, Aharon

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KW - Intramolecular reduction

KW - Metal salts

KW - Silicone oil

KW - Sonochemistry

KW - Thermally induced reduction

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Formation of metallic silver and copper in non-aqueous media by ultrasonic radiation

Abstract

Bibliographical note

Funding

Keywords

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