质子Z-模式CdS-共价有机框架异质连接与高效的光催化进化
Fang Duan1, Jialiang Sheng1, Songhu Shi1
1Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, PR China.
Journal of colloid and interface science
|July 11, 2024
概括
这项研究开发了一种新的CdS-COF-Ni Z方案异质连接,用于高效的光催化生产. 这种材料在没有催化剂的情况下实现了气生成的21倍.
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 可再生能源可再生能源是可再生能源.
背景情况:
- 光催化生产在吸光,电荷分离和水运输方面面临着挑战.
- 开发高效的光催化剂对于可持续的燃料生产至关重要.
研究的目的:
- 为增强光催化生产构建一种无机有机Z模式异质连接 (CdS-COF-Ni).
- 为了改善电荷分离,光吸收和水分子运输到活性点.
主要方法:
- 在离子 (COF-Ni) 的基于氨酸的共价有机框架上CdS纳米片的现场生长.
- 使用 Askorbic 酸 (AC) 的表面质子处理来增强水友性.
- 光电化学测量,现场X射线光电子光谱 (XPS) 和密度函数理论 (DFT) 计算.
主要成果:
- 在CdS-COF-Ni异质连接中,光催化的产生率为18.23 mmol h-1 g-1,比CdS单独增加了21倍.
- 接口的内置电场加速了电荷的分离和转移.
- 表面质子显著改善了水分子向催化中心的运输.
- 证实了Z-scheme机制的高效负载传输和高降低能力.
结论:
- CdS-COF-Ni Z方案异质连接为高效光催化水分解提供了一个有希望的策略.
- 界面相互作用和表面修饰的协同效应提高了光催化性能.
- 这种方法为可再生能源应用设计先进的有机-无机异质连接提供了一条途径.
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