构建具有密度较高的 thiophene S 位点的共价有机框架,以有效捕获
Yiling Ran1,2,3, Yi Wang3, Man Yang3
1School of Chemistry, Southwest Jiaotong University Chengdu Sichuan 610031 China zyzw@swjtu.edu.cn.
RSC advances
|October 16, 2024
概括
含有硫的新型共价有机框架 (COF) 在捕获方面表现出高效率. 这些材料,特别是TAB-COF,为气态和溶解提供了出色的吸附能力,为先进的吸附剂开发铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 核工程 核工程是指核工程.
背景情况:
- 开发有效的放射性核酸吸附材料,如,对于核能和环境安全至关重要.
- 联有机框架 (COF) 已成为有前途的吸收剂,因为它们的可调性孔隙性和功能组.
研究的目的:
- 设计和合成新型含有硫的COF,以有效捕获.
- 为了评估这些COF在气态和溶液阶段的吸附性能.
- 用计算方法阐明吸附机制.
主要方法:
- 使用希夫基反应合成了两种基于烯的COF:TAPT-COF和TAB-COF.
- 合成的COF的表面积和多孔度的特征.
- 对气态和环中的吸附能力进行了测量.
- 进行密度函数理论 (DFT) 计算,以了解活性吸附点.
主要成果:
- 与TAPT-COF (1141 m2 g-1) 相比,TAB-COF的表面积 (1378 m2 g-1) 更大.
- TAB-COF表现出极好的气态吸附能力 (2.81 g g−1) 和溶液相吸附 (200 mg g−1 在环中).
- DFT的计算证实了COF骨干中的和硫位点对吸附是活跃的,TAB-COF提供了更容易访问的位点.
结论:
- 含有蒂奥芬的COF,特别是TAB-COF,是吸附的高效材料.
- 高表面积和丰富的N / S活性位点的组合有助于卓越的性能.
- 这些发现支持在各种环境应用中用于捕获的基于COF的先进吸附剂的开发.
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