Sonochemical decomposition of noble metal oxides and sonochemical alloying of gold–silver systems

Yamato Hayashi; Yusuke Ebato; Ryoma Onishi; Hirotsugu Takizawa

Ultrasonics Sonochemistry (Sep 2022)

Sonochemical decomposition of noble metal oxides and sonochemical alloying of gold–silver systems

Yamato Hayashi,
Yusuke Ebato,
Ryoma Onishi,
Hirotsugu Takizawa

Affiliations

Yamato Hayashi: Corresponding author.; Department of Applied Chemistry, Chemical Engineering and Biomolecular Engineering, Tohoku University, 6-6 Aoba, Aramaki, Aobaku, Sendai 980-8579, Japan; Graduate School of Engineering Department of Applied Chemistry, Tohoku University, 6-6 Aoba, Aramaki, Aobaku, Sendai 980-8579, Japan
Yusuke Ebato: Department of Applied Chemistry, Chemical Engineering and Biomolecular Engineering, Tohoku University, 6-6 Aoba, Aramaki, Aobaku, Sendai 980-8579, Japan; Graduate School of Engineering Department of Applied Chemistry, Tohoku University, 6-6 Aoba, Aramaki, Aobaku, Sendai 980-8579, Japan
Ryoma Onishi: Graduate School of Engineering Department of Applied Chemistry, Tohoku University, 6-6 Aoba, Aramaki, Aobaku, Sendai 980-8579, Japan
Hirotsugu Takizawa: Department of Applied Chemistry, Chemical Engineering and Biomolecular Engineering, Tohoku University, 6-6 Aoba, Aramaki, Aobaku, Sendai 980-8579, Japan; Graduate School of Engineering Department of Applied Chemistry, Tohoku University, 6-6 Aoba, Aramaki, Aobaku, Sendai 980-8579, Japan

Journal volume & issue: Vol. 89
p. 106115

Abstract

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Recently, environmental problems, such as global warming, have become more severe; thus, there is a requirement to implement sustainable development goals in materials processing. In this study, we investigated a low-cost and environmentally-friendly sonochemical process for the synthesis of metal nanoparticles with large specific surface areas and catalysis effects. Au2O3 hydrate and Ag2O were reduced to Au and Ag, respectively, at room temperature in a short time when irradiated with ultrasound in ethanol. Furthermore, when a mixed powder of Au2O3 hydrate and Ag2O was irradiated in ethanol, Au–Ag alloys were obtained in only 10 min. This fast and environmentally friendly alloying technique, known as sonochemical alloying, is promising for alloy syntheses.

Published in Ultrasonics Sonochemistry

ISSN: 1350-4177 (Print); 1873-2828 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry; Science: Physics: Acoustics. Sound
Website: https://www.journals.elsevier.com/ultrasonics-sonochemistry

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