Adsorption Characteristics of Ag Nanoparticles on Cellulose Nanofibrils with Different Chemical Compositions

The adsorption characteristics of silver nanoparticles (AgNPs) on cellulose nanofibrils (CNFs) were investigated herein with different chemical compositions. Pure cellulose nanofibers (PCNFs), lignocellulose nanofibers (LCNFs) with different lignin contents (LCNF-20% and LCNF-31%), and holocellulose...

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Bibliographic Details
Published in:Polymers 2020-01, Vol.12 (1), p.164
Main Authors: Kwon, Gu-Joong, Han, Song-Yi, Park, Chan-Woo, Park, Ji-Soo, Lee, En-Ah, Kim, Nam-Hun, Alle, Madhusudhan, Bandi, Rajkumar, Lee, Seung-Hwan
Format: Article
Language:English
Subjects:
Adsorption
Caustic soda
Cellulose
Cellulose fibers
Chemical composition
Composition effects
Fourier transforms
Hydroxyl groups
Infrared analysis
Infrared spectroscopy
Lignin
Lignocellulose
Nanocomposites
Nanofibers
Nanoparticles
Photoelectrons
Reducing agents
Silver nitrate
Sodium
Spectrum analysis
Sustainable materials
Temperature effects
X ray photoelectron spectroscopy
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Summary:The adsorption characteristics of silver nanoparticles (AgNPs) on cellulose nanofibrils (CNFs) were investigated herein with different chemical compositions. Pure cellulose nanofibers (PCNFs), lignocellulose nanofibers (LCNFs) with different lignin contents (LCNF-20% and LCNF-31%), and holocellulose nanofibers (HCNFs) with hemicellulose were used in this study. Furthermore, CNFs and silver nitrate were mixed and reacted at different temperatures, and NaBH was used as the reducing agent. First, the effect of temperature on the adsorption of AgNPs on PCNF was studied. At an optimal temperature (45 °C), the effect of the chemical composition of CNF was studied. The overall properties were analyzed using UV-vis spectroscopy, transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The AgNPs were found to be spherical under all conditions with average diameter of 5.3 nm (PCNF), 5.6 nm (HCNF), 6.3 nm (LCNF-20%) and 6.6 nm (LCNF-31%). The amount of AgNPs adsorbed on the CNF was observed to vary, based on the chemical composition of the CNF. The adsorption amount of AgNPs was observed to increase in the order of LCNF-20% > PCNF > LCNF-31% > HCNF. The results indicated that phenolic hydroxyl groups present in LCNF significantly affected the adsorption of AgNPs.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym12010164