AI Article Synopsis
- - This study introduces a simple one-step method to create all-cellulose layered membranes using various cellulose-based materials, enhancing their functionality for environmental applications.
- - The membranes have high adsorption capabilities for metal ions and organic dyes due to their active chemical sites, making them effective for removing pollutants from water.
- - Additionally, the membranes act as efficient metal-free catalysts for dye decolorization, showing improved performance compared to traditional methods, highlighting their potential utility in water purification systems.
Article Abstract
In this study, we present a facile, one-step method for the manufacturing of all-cellulose, layered membranes containing cellulose nanocrystals (CNC), TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated oxidized cellulose nanofibers (TO-CNF), or zwitterionic polymer grafted cellulose nanocrystals (CNC-g-PCysMA) as functional entities in combination with cellulose fibers and commercial grade microfibrillated cellulose. The presence of active sites such as hydroxyl, carbonyl, thioethers, and amines, gave the membranes high adsorption capacities for the metal ions Au (III), Co (II), and Fe (III), as well as the cationic organic dye methylene blue (MB). Furthermore, the membranes served as excellent metal-free catalysts for the decolorization of dyes via hydrogenation. A 3-fold increase of the hydrogenation efficiency for cationic dyes such as rhodamine B (RhB) and methylene blue was obtained in the presence of membranes compared to NaBH alone. Water-based processing, the abundance of the component materials, and the multifunctional characteristics of the membranes ensure their potential as excellent candidates for water purification systems.
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| http://dx.doi.org/10.1016/j.carbpol.2021.118044 | DOI Listing |
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