富含的基于酸的共价有机框架作为有效的可见光光催化剂,用于生产过氧化
Shu Yang1,2, Keke Zhi3,4, Zhimin Zhang1,2
1College of Chemistry, Xinjiang University, Urumqi 830017, China.
Nanomaterials (Basel, Switzerland)
|April 12, 2024
概括
这项研究开发了基于三的新型共价有机框架 (COFs),用于高效的光催化过氧化 (H2O2) 生产. 含胺的TTP-COF显著提高了H2O2的产量,超过了类似结构的性能.
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
- 绿色化学 绿色化学
背景情况:
- 聚合有机框架 (COF) 显示出光催化过氧化 (H2O2) 生产的希望,因为它们的可调节电子特性和光吸收.
- 在COF应用中的一个主要限制是光生成的电荷载体的快速再组合,阻碍了它们的效率.
- 开发新的COF结构对于克服这些局限性和提高光催化性能至关重要.
研究的目的:
- 设计和合成两个新的,高度结合的三酸基COF,TBP-COF和TTP-COF.
- 评估和比较这些COF的光催化性能,以从水中产生H2O2.
- 调查结构-活性关系,特别是皮里丁位点在提高光催化效率中的作用.
主要方法:
- 合成高合和含量的基于三的COF (TBP-COF和TTP-COF).
- 对COF属性的表征,包括光吸收,电子结构和电荷载体动力学.
- 在可见光照射下 (420nm,10W LED) 使用纯水而不含牺牲剂进行H2O2生产的光催化评估.
主要成果:
- 具有皮里丁位点的TTP-COF显示显著增强光催化H2O2生产 (4244μmol h−1 g−1).
- 缺少皮里丁位点的TBP-COF显示出较低的H2O2产量 (1882 μmol h-1 g-1),表明了皮里丁合并的重要性.
- 与TBP-COF相比,TTP-COF表现出更高的表现 (大约. 2.5倍的效率) 和之前报告的大多数非金属COF光催化剂.
结论:
- 设计的基于三的COF,特别是TTP-COF,是H2O2生产的高效光催化剂.
- 在TTP-COF中,富含的结构,高合和位促进了高效的光吸收,电荷分离和O2吸附,从而提高了活性.
- 这些发现突出了定制COF设计的潜力,以实现可持续和高效的H2O2生产.
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