Citation: Shiyan Ai, Yaning Xu, Hui Zhou, Ziwei Cui, Tiantian Wu, Dan Tian. Superelastic and ultralight covalent organic framework composite aerogels modified with different functional groups for ultrafast adsorbing organic pollutants in water[J]. Chinese Chemical Letters, ;2025, 36(10): 110761. doi: 10.1016/j.cclet.2024.110761 shu

Superelastic and ultralight covalent organic framework composite aerogels modified with different functional groups for ultrafast adsorbing organic pollutants in water

Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China

tiandan@njfu.edu.cn

Received Date: 4 August 2024
Revised Date: 17 November 2024
Accepted Date: 12 December 2024
Available Online: 14 December 2024

Figures(6)

Covalent organic frameworks (COFs) have great potential as adsorbents due to their customizable functionality, low density and high porosity. However, COFs powder exists with poor processing and recycling performance. Moreover, due to the accumulation of COFs nanoparticles, it is not conducive to the full utilization of their surface functional groups. Currently, the strategy of COFs assembling into aerogel can be a good solution to this problem. Herein, we successfully synthesize composite aerogels (CSR) by in-situ self-assembly of two-dimensional COFs and graphene based on crosslinking of sodium alginate. Sodium alginate in the composite improves the mechanical properties of the aerogel, and graphene provides a template for the in-situ growth of COFs. Impressively, CSR aerogels with different COFs and sizes can be prepared by changing the moiety of the ligand and modulating the addition amount of COFs. The prepared CSR aerogels exhibit porous, low density, good processability and good mechanical properties. Among them, the density of CSR-N-1.6 is only 5 mg/cm³, which is the lowest density among the reported COF aerogels so far. Due to these remarkable properties, CSR aerogels perform excellent adsorption and recycling properties for the efficient and rapid removal of organic pollutants (organic dyes and antibiotics) from polluted water. In addition, it is also possible to visually recognize the presence of antibiotics by fluorescence detection. This work not only provides a new strategy for synthesizing COF aerogels, but also accelerates the practical application of COF aerogels and contributes to environmental remediation.
- Covalent organic frameworks,
- Graphene,
- Aerogels,
- Adsorption,
- Sewage treatment
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