原子Au3Cu Palisade介层在核心@Shell纳米结构中,以实现高效的Kirkendall效应调解
Tailei Hou1, Xinyuan Li1, Xiuming Zhang1
1Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, Key Laboratory of Medical Molecule Science and Pharmaceutical Engineering, Ministry of Industry and Information Technology, MOE Key Laboratory of Cluster Science, School of Chemistry and Chemical Engineering, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China.
Nano letters
|February 20, 2024
概括
研究人员使用原子薄的金铜介层开发了固体等离子铜@半导体异质纳米晶体 (HNC). 这种中间层克服了合成的挑战,使得高效的光催化二氧化碳减少到二氧化碳.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 催化剂是一种催化剂.
背景情况:
- 等离子铜@半导体异质纳米晶 (HNC) 为催化提供了有前途的特性.
- 纳米级的Kirkendall效应通常会阻碍固体HNC结构的合成.
研究的目的:
- 开发一种方法,通过减轻Kirkendall效应来合成固体Cu@半导体HNC.
- 调查原子薄金铜介层在控制材料扩散和晶格不匹配方面的作用.
主要方法:
- 采用原子薄的Au3Cu护间层进行拓合成.
- 采用连续的阴离子交换来创建Cu@Au3Cu@Ag2S和Cu@Au3Cu@CdS核心外的HNC.
- 进行实验和理论研究,研究Cu原子扩散动力学.
主要成果:
- 成功合成了固体Cu@Au3Cu@CdS HNCs,具有特殊的结晶性和有组织的异质接口.
- Au3Cu中间层有效调节了Cu的扩散,并减轻了Cu和Ag/CdS之间的格子不匹配.
- 从Cu@Au3Cu核心向CdS外中证明了高效的等离子诱导热电子注入.
结论:
- 开发的方法可以通过控制Kirkendall效应来合成先进的等离子HNC.
- Cu@Au3Cu@CdS HNC 对于光催化 CO2 减少为 CO 的高活性和选择性.
- 原子薄的介层对于设计具有可控接口的功能纳米材料至关重要.
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