用于高效可见光驱动的H2O2光合作用的Piperazine-Linked金属酸框架
Qianjun Zhi1, Wenping Liu1, Rong Jiang1
1Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Journal of the American Chemical Society
|November 9, 2022
概括
从氧气中合成高活性共价有机框架 (COF) 来进行过氧化 (H2O2) 的人工光合作用. 这些新的与皮佩拉津结合的基于COPc的COF证明了可见光驱动的高效H2O2生产.
科学领域:
- 材料科学
- 光催化
- 绿色化学
背景情况:
- 人工光合作用H2O2提供了一种节能且环保的替代方案.
- 开发高活性和选择性的2e-氧降解反应 (ORR) 光催化剂对于高效的H2O2产生至关重要.
- 目前的光催化剂的生产率往往不够.
研究的目的:
- 合成基于甲 (CoPc) 的新型二维 piperazine-linked 共价有机框架 (COF).
- 通过在可见光下减少氧气来研究它们作为H2O2生产的光催化剂的效率.
- 在人工光合作用中建立基于COF的光催化剂的新基准.
主要方法:
- 通过核友替代反应合成CoPc-BTM-COF和CoPc-DAB-COF.
- 使用粉末X射线衍射,电子显微镜和光谱学进行表征.
- 在可见光下将O2转化为H2O2的光催化活性评估 (λ > 400 nm).
主要成果:
- 合成的COF具有晶体多孔框架,具有完全结合的结构和隐蔽的π堆叠.
- 它们具有广泛的光吸收 (400-1000 nm) 和增强的光诱导电荷分离/传输效率.
- CoPc-BTM-COF在630nm时实现了2096μmolh-1g-1的H2O2产量和7.2%的表面量子产量.
结论:
- 基于Piperazine的COF是可见光驱动的H2O2生产的高效光催化剂.
- 与现有的基于COF的光催化剂相比,这些材料具有更高的性能.
- 这些发现为开发高性能,低成本的光催化剂为可持续的H2O2合成铺平了道路.
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