Few-nm-sized, phase-pure Au5Sn intermetallic nanoparticles: synthesis and characterization,Dalton Transactions

当前位置： X-MOL 学术 › Dalton Trans. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Few-nm-sized, phase-pure Au5Sn intermetallic nanoparticles: synthesis and characterization
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-3-16 , DOI: 10.1039/d1dt00132a
Satoshi Osugi _{1,

2,

3,

4,

5} , Shinjiro Takano _{1,

2,

3,

4,

5} , Shinya Masuda _{1,

2,

3,

4,

5} , Koji Harano _{1,

2,

3,

4,

5} , Tatsuya Tsukuda _{1,

2,

3,

4,

5}

Affiliation

Nanoparticles of intermetallic compounds have attracted much interest because they can exhibit novel electronic and catalytic properties due to their specific crystal structure, ordered atomic arrangement, and quantum effect. Here, gold-tin (AuSn) bimetallic nanoparticles with various mixing ratios were prepared by a co-reduction method using various protective agents (e.g., polymer, amine, phosphine, carboxylic acid, and thiol). Powder X-ray diffractometry and transmission electron microscopy revealed that few-nm-sized, phase-pure Au₅Sn intermetallic nanoparticles (IMNPs) were successfully synthesized when Au³⁺ and Sn²⁺ precursors with a ratio of 6 : 4 were co-reduced in the presence of oleylamine. The Au₅Sn IMNPs thus prepared did not exhibit localized surface plasmon resonance, in contrast to pure Au nanoparticles of comparable sizes. This suggests that interband transition dominates the optical response due to an increase in the density of states near the Fermi level by introducing Sn. The Au₅Sn IMNPs supported on mesoporous silica (SBA-15) catalyzed the aerobic oxidation reaction of indanol.

中文翻译：

几纳米大小，纯相的Au5Sn金属间纳米颗粒：合成与表征

金属间化合物的纳米颗粒由于其特定的晶体结构，有序的原子排列和量子效应而具有新颖的电子和催化性能，因此引起了人们的极大兴趣。在此，通过使用各种保护剂（例如，聚合物，胺，膦，羧酸和硫醇）的共还原法，制备了具有各种混合比例的金-锡（AuSn）双金属纳米颗粒。粉末X射线衍射仪和透射电子显微镜显示，当Au ³⁺和Sn ²⁺前体以6：4的比例共存时，可以成功合成几纳米大小，纯相的Au ₅ Sn金属间纳米颗粒（IMNP）。在油胺存在下还原。金₅与可比较大小的纯Au纳米颗粒相比，如此制备的Sn IMNPs不表现出局部表面等离子体共振。这表明由于引入Sn，由于费米能级附近的态密度增加，带间跃迁主导了光响应。负载在介孔二氧化硅（SBA-15）上的Au ₅ Sn IMNPs催化了吲哚醇的好氧氧化反应。

更新日期：2021-03-23

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南