双光敏感剂合的三维金属共价有机框架,用于高效的光催化反应
Meng Lu1, Shuai-Bing Zhang2, Ming-Yi Yang1
1School of Chemistry, South China Normal University, Guangzhou, 510006, P. R. China.
Angewandte Chemie (International ed. in English)
|June 6, 2023
概括
我们开发了新的双光敏感体金属共价有机框架 (MCOFs),用于高效的光催化生产. 这些MCOF实现了高产量,并在基化中成功应用.
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
- 有机化学 有机化学
背景情况:
- 传统的光敏感剂,如/铁和氨酸复合物,在光催化应用方面存在局限性.
- 开发具有增强光吸收和电子转移的先进材料对于高效的光催化是至关重要的.
研究的目的:
- 设计和合成基于双光敏感剂的新型三维金属共价有机框架 (3D MCOF).
- 为了研究这些3D MCOFs的光催化演化活动.
- 在随后的催化反应中探索现场生成的的潜力.
主要方法:
- 聚烯/铁 (Ru(bpy) 3 2+ /Fe(bpy) 3 2+ ) 和氨酸/金属氨酸 (2HPor/ZnPor) 单位的共价结合.
- 制造3D金属共价有机框架 (MCOFs).
- 在可见光照射下进行光催化进化实验.
- 显而易见的量子效率 (AQE) 测量.
- 对基化进行并联催化.
- 理论计算以了解光刺激机制.
主要成果:
- 合成的3DMCOF显示出强烈的可见光吸收,高效的电子传输和合适的带间隙.
- -ZnPor COF显示出最高的H2产量 (30,338 μmol g-1 h-1),其AQE为9.68% @ 420nm.
- 在现场生产的H2在协同基化中实现了99.9%的转化效率.
- 理论计算证实,这两种光敏感剂单元都会促进增强的光催化活性.
结论:
- 开发的3DMCOF代表了光催化进化中的重大进步.
- 双光敏感剂策略有效地提高了光催化性能.
- 这项工作为设计使用多种光敏感材料的先进光催化剂提供了总体策略.
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