用于吸附和去除染料的无定形四嗪-三嗪官能化共价有机框架,New Journal of Chemistry

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用于吸附和去除染料的无定形四嗪-三嗪官能化共价有机框架
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2023-06-20 , DOI: 10.1039/d3nj01913f
Shubham Kumar ₁ , Kusum Kumari ₂ , Saurabh K. Singh ₂ , Bharat Z. Dholakiya ₁ , Ritambhara Jangir ₁

Affiliation

环境问题可以通过包含预先设计的多孔结构的共价有机框架（COF）来解决。在此，我们通过 2,4,6-三-(4-甲酰基苯氧基)-1,3,5-三嗪（TPT- CHO) 和s-四嗪二胺（Tz）。TzTPT-COF具有有序-无序可及的纳米通道，实验孔宽度为8.5 nm，模拟孔宽度为6.4 nm。我们详细描述了二维 TzTPT-COF 的表征，该二维 TzTPT-COF 具有易于接近的 8.5 nm 大小的孔，随后将其用作多孔吸附剂，用于静态和动态吸附小染料分子，特别是染料掺杂水中的亚甲基蓝。此外，COF 在 15 分钟内迅速达到其最大吸附容量的 99%。COF 的热稳定性得以保持，在 280 °C 时观察到逐渐失重。此外，COF不表现出结晶性并具有介孔结构。实验结果和计算机模拟模拟表明，要制造具有有效染料吸附能力的COF基吸附剂，必须同时考虑COF材料的固有孔径以及有机染料分子的尺寸。由于具有高吸附效率、超快动力学和出色的可重复使用性，TzTPT-COF 作为吸附材料具有巨大的潜力，可用于消除废水中的阳离子染料和其他有机污染物。因此，目前的研究结果表明，COF 也可以被证明是适用于各种环境修复应用的高度通用的多孔材料。

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Amorphous tetrazine–triazine-functionalized covalent organic framework for adsorption and removal of dyes

Environmental problems can potentially be solved by covalent organic frameworks (COFs) that contain predesigned porous architectures. Herein, we developed an amorphous tetrazine–triazine-functionalized covalent organic framework (TzTPT-COF) by performing one-pot polycondensations of 2,4,6-tris-(4-formylphenoxy)-1,3,5-triazine (TPT-CHO) and s-tetrazine-diamine (Tz). The TzTPT-COF possesses ordered-disordered accessible nano-channels with an experimental pore width of 8.5 nm and simulated pore width of 6.4 nm. We detail the characterization of two-dimensional TzTPT-COF with readily accessible 8.5 nm-sized pores, which was subsequently employed as a porous adsorbent for the static and dynamic adsorption of small dye molecules, especially methylene blue from dye-adulterated water. Additionally, the COF quickly attained up to 99% of its maximum adsorption capacity within 15 min. The thermal stability of the COF was maintained, with the onset of gradual weight loss observed at 280 °C. Furthermore, the COF exhibited no crystallinity and possesses a mesoporous structure. The experimental findings and in silico simulation revealed that to create COF-based adsorbents with effective dye adsorption capabilities, it is necessary to concurrently consider the inherent pore size of the COF material as well as the size of the organic dye molecules. The TzTPT-COF has a great deal of potential as an adsorbent material for eliminating cationic dyes and other organic pollutants from wastewater due to the high adsorption efficiencies, ultrafast kinetics, and outstanding reusability. Hence, the present findings suggest that COFs can also be proven to be highly versatile porous materials for various environmental remediation applications.

更新日期：2023-06-20

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