红外光诱导异常缺陷介导的等离子热电子转移用于增强光催化进化
Zichao Lian1, Fan Wu1, Jiangzhi Zi1
1School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China.
Journal of the American Chemical Society
|July 7, 2023
概括
新的CuS@ZnS核心@外纳米晶体利用红外光进行高效的太阳能燃料转化. 这些纳米晶体通过一种新的等离子体诱导缺陷媒介载体转移机制,在演化反应中表现出增强的光催化活性.
科学领域:
- 材料科学
- 光催化
- 纳米技术
背景情况:
- 有效利用太阳能对于可持续的燃料生产至关重要.
- 红外线几乎占太阳能的一半, 在太阳能燃料过程中仍未得到充分利用.
- 开发用于增强光催化活性的先进材料至关重要.
研究的目的:
- 在红外 (IR) 区域用局部表面等离子体共振 (LSPR) 合成和表征CuS@ZnS核心@shell纳米晶体 (CSNC).
- 研究CSNC在演化反应 (HER) 中增强的光催化活性.
- 阐明底层机制,称为"等离子体诱导缺陷介导载体转移" (PIDCT),负责提高性能.
主要方法:
- 合成CuS@ZnS核心@外纳米晶体 (CSNCs).
- 在红外光区域的LSPR特性.
- 时间解析的瞬态光谱研究载体动态.
- 在近红外辐射下对进化反应 (HER) 的光催化活性进行评估.
主要成果:
- 在IR地区,CSNC表现出强烈的LSPR特征.
- HER的高量子产量达到了29. 2%.
- 与对照物质相比,CuS@ ZnS CSNC 的 HER 速率显著提高 (26. 9 μmol h−1 g−1).
- 在异质接口的独特PIDCT机制被认为是性能的关键.
结论:
- 使用红外光的 CuS@ZnS CSNC 是有效的光催化剂.
- PIDCT机制为优化LSPR生成的载体动力学提供了一条途径.
- 在LSPR纳米晶体中的缺陷工程为提高太阳能转化为燃料效率提供了一个有希望的策略.
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