贵金属氧化物的声化学分解及金-银体系的声化学合金化。

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

作者信息

Hayashi Yamato, Ebato Yusuke, Onishi Ryoma, Takizawa Hirotsugu

机构信息

Department of Applied Chemistry, Chemical Engineering and Biomolecular Engineering, Tohoku University, 6-6 Aoba, Aramaki, Aobaku, Sendai 980-8579, Japan.

出版信息

Ultrason Sonochem. 2022 Sep;89:106115. doi: 10.1016/j.ultsonch.2022.106115. Epub 2022 Aug 9.

DOI:10.1016/j.ultsonch.2022.106115

PMID:35988292

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9418546/

Abstract

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. AuO hydrate and AgO 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 AuO hydrate and AgO 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.

摘要

近年来，诸如全球变暖等环境问题变得愈发严峻；因此，在材料加工中实施可持续发展目标成为了一种需求。在本研究中，我们探究了一种低成本且环境友好的声化学方法，用于合成具有大比表面积和催化效应的金属纳米颗粒。当在乙醇中用超声波辐照时，水合氧化金和氧化银在室温下短时间内分别被还原为金和银。此外，当水合氧化金和氧化银的混合粉末在乙醇中被辐照时，仅10分钟就获得了金 - 银合金。这种快速且环境友好的合金化技术，即声化学合金化，在合金合成方面具有广阔前景。