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Published in: Cellulose 11/2020

16-05-2020 | Original Research

Synthesis of a zinc–imidazole metal–organic framework (ZIF-8) using ZnO rods grown on cotton fabrics as precursors: arsenate absorption studies

Authors: Marion Schelling, Manuela Kim, Eugenio Otal, Myriam Aguirre, Juan P. Hinestroza

Published in: Cellulose | Issue 11/2020

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Abstract

A Zn-imidazolate metal–organic framework, ZIF-8, was synthesized using ZnO nanorods grown on cotton fibers as precursors. We monitored the synthesis path via X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis. The fibers were evaluated by their capacity to absorb arsenate from aqueous solutions and we used scanning transmission electron microscopy–high angle annular dark-field (STEM–HAADF) imaging to observe the transport gradient of arsenate across the ZIF layer and the ZnO interface. The uptake of arsenate in the fibers coated with ZIF-8 on top of the ZnO rods, at pH 7, was of 70% while the uptake of the fibers coated only with ZnO rods was 38%. In addition to the enhanced uptake capacity, the fibers containing ZIF-8 also exhibited lower amounts of Zn leaching into the arsenate solutions. These results provide insights on the synthesis of Zn-imidazole metal–organic frameworks and confirm the potential use of ZIF-8 in the removal of arsenate from contaminated water streams.

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Metadata
Title
Synthesis of a zinc–imidazole metal–organic framework (ZIF-8) using ZnO rods grown on cotton fabrics as precursors: arsenate absorption studies
Authors
Marion Schelling
Manuela Kim
Eugenio Otal
Myriam Aguirre
Juan P. Hinestroza
Publication date
16-05-2020
Publisher
Springer Netherlands
Published in
Cellulose / Issue 11/2020
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-020-03216-4

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