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Erschienen in: Cellulose 11/2017

06.09.2017 | Original Paper

Microwave-assisted facile synthesis of TEMPO-oxidized cellulose beads with high adsorption capacity for organic dyes

verfasst von: Fengcai Lin, Yuzhe You, Xuan Yang, Xin Jiang, Qilin Lu, Ting Wang, Biao Huang, Beili Lu

Erschienen in: Cellulose | Ausgabe 11/2017

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Abstract

A facile, green and efficient microwave-assisted method was developed to oxidize cellulose hydrogel beads with neutral 2,2,6,6-tetramethylpiperidinyl-1-oxyl radical (TEMPO)-mediated system. Resulting cellulose beads were investigated by scanning electron microscopy, solid-state 13C-NMR spectra, and X-ray diffraction. The patterns of 13C-NMR spectra indicated that the oxidation occurred only at C6 primary hydroxyl carbon, and the carboxyl groups amounted to 1.28 mmol/g in the cellulose beads. The TEMPO-oxidized cellulose beads showed highly porous structures consisting of nano-sized fibrils with retention of original spherical shapes, and the crystallinity index of the cellulose II almost unchanged after oxidation. The maximum adsorption capacity of rhodamine B, auramine O, malachite green and methylene blue on the TEMPO-oxidized cellulose beads was found to be 609, 537, 740 and 873 mg/g, respectively, and the adsorption process was well described by pseudo-second-order kinetics. In addition, desorption tests showed that TEMPO-oxidized cellulose beads could be regenerated by acid treatment and used repeatedly. Thus, TEMPO-oxidized cellulose beads prepared by microwave irradiation can be potentially used for the removal of organic dyes from industrial wastewater.

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Metadaten
Titel
Microwave-assisted facile synthesis of TEMPO-oxidized cellulose beads with high adsorption capacity for organic dyes
verfasst von
Fengcai Lin
Yuzhe You
Xuan Yang
Xin Jiang
Qilin Lu
Ting Wang
Biao Huang
Beili Lu
Publikationsdatum
06.09.2017
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 11/2017
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-017-1473-9

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