Chitin/Metal-Organic Framework: a broad scope pollutants adsorbent
| Main Authors: | Tovar, G, Valverde, A, Mendes-Felipe, C, Wuttke, S, Fidalgo-Marijuan, Arkaitz, Larrea, Edurne S., Lezama, L, Yuang, F, Reguera, J, Lanceros-Mendez, S., Arriortua, María Isabel, Copello, Guilermo, Fernandez de Luis, Roberto |
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| Format: | info publication-workingpaper |
| Bahasa: | eng |
| Terbitan: |
, 2020
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3768522 |
Daftar Isi:
- As a consequence of both natural and anthropogenic origins, the diversity of pollutants found in water is strongly increasing, making it necessary to develop novel technologies for the purification of this complex media. In this context, composites based on Chitin (CH) biopolymer and metal-organic framework (MOF) microporous nanoparticles have been develop to work as broad scope pollutant absolvent. Full characterization of the chitin/metal-organic framework composites reveals that the MOF nanoparticles interact through electrostatic forces with the CH matrix, inducing both disorder in the CH polymeric chains and CH chain – MOF-808 regions, and finally leading to a CH matrix macro-pores compartmentalization and an overall surface area gain in the composites. As a consequence, chitin/metal-organic framework adsorbent materials contain micro, meso and macroporous structures that efficiently retain model pollutants with very diverse chemical structure, charges and sizes ranging from Angstroms (e.g. As(V), erythrosine, methylene blue, methyl orange) to nanometers (e.g. polymyxin B, lysozime or AuNPs). In addition, the full kinetic and adsorption capacity of the system has been studied for As(V) and organic dyes, in order to understand the performance of the Chitin/metal-organic framework samples. Chemisorption is revealed as the most plausible mechanisms for As(V), which is mainly immobilized at the nMOF-808. The chemical diversity and plasticity of MOF materials combined with the simple processability and biocompatibility of the CH matrix opens these composites to applications in many fields beyond water remediation; since the chemical affinity of MOF can be pre or post-synthetically tuned through their decoration with diverse functional motifs, and the porous structure of the Chitin matrix can be shaped depending on the processing methodology.