通过产生和转换单片氧气,促进太阳能驱动的过氧化生产,而不是基于醇的合聚合物
Jingzhao Cheng1, Sijie Wan1, Shaowen Cao1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, P. R. China.
Angewandte Chemie (International ed. in English)
|August 15, 2023
概括
新的基于 thiazole 的聚合物有效地利用太阳能和空气产生过氧化 (H2O2). BBTz聚合物显示出最高的生产率,由单点氧气生成驱动,为传统方法提供可持续的替代方案.
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:
- 传统的氧化 (H2O2) 生产的 antraquinone 方法是能源密集且昂贵的.
- 太阳能驱动的从水和空气中合成H2O2提供了一个可持续和经济的替代方案.
- 开发高效的单聚合物光催化剂对于推进这项技术至关重要.
研究的目的:
- 为太阳能驱动的H2O2生产合成和评估基于 thiazole 的新型结合聚合物 (Tz-CPs).
- 研究光催化机制,重点关注单片氧 (1O2) 的作用.
- 优化聚合物结构以提高H2O2产量,并探索其作为优质光催化剂的潜力.
主要方法:
- 通过 aldimine 凝结合成四种基于 thiazole 的结合聚合物 (TTz,BTz,TBTz,BBTz).
- 在纯水中的太阳辐射下对H2O2生产速度的光催化评估.
- 使用电子磁共振 (EPR),现场扩散反射红外里埃变换 (DRIFT) 和理论计算的机制研究.
主要成果:
- BBTz显示出最高的H2O2生产率 (7274 μmol g-1 h-1).
- 机械分析揭示了单片氧 (1O2) 在H2O2生成途径中的突出作用.
- 单片氧气形成涉及超氧基 (•O2-) 氧化和 [4+2] 循环添加,在BBTz上形成内氧化物.
结论:
- 基于醇的合聚合物,特别是BBTz,是太阳能H2O2合成的有效单聚合物光催化剂.
- 该机制涉及通过超氧化氧化和循环添加生成单点氧气,增强电荷分离并降低H2O2生产障碍.
- 这项研究为光催化O2减排和先进光催化剂的分子设计提供了宝贵的见解.
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